Regional Geochemical Results from Analyses of 

Stream-Water, Stream-Sediment, Soil, Soil-Water, 

Bedrock, and Vegetation Samples, Tangle Lakes 

District, Alaska

Open-File Report 2008–1260

Prepared in cooperation with the Alaska Department of Natural Resources

U.S. Department of the Interior

U.S. Geological Survey

Regional Geochemical Results from 

Analyses of Stream-Water, Stream-Sediment, 

Soil, Soil-Water, Bedrock, and Vegetation 

Samples, Tangle Lakes District, Alaska

By Bronwen Wang, U.S. Geological Survey; L.P. Gough, U.S. Geological Survey; 

R.B. Wanty, U.S. Geological Survey; G.K. Lee, U.S. Geological Survey; James Vohden, 

U.S. Geological Survey, J.M. O’Neill, U.S. Geological Survey; and L.J. Kerin, Alaska

Department of Natural Resources

Prepared in cooperation with Alaska Department of Natural Resources

Open-File Report 2008–1260

U.S. Department of the Interior

U.S. Geological Survey
U.S. Department of the Interior

DIRK KEMPTHORNE, Secretary

U.S. Geological Survey

Mark D. Myers, Director

U.S. Geological Survey, Reston, Virginia: 2008

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Suggested citation:

Wang, Bronwen, Gough, L.P., Wanty, R.B., Lee, G.K., Vohden, James, O’Neill, J.M., and Kerin, L.J., 2008, Regional 

geochemical results from analyses of stream-water, stream-sediment, soil, soil-water, bedrock, and vegetation 

samples, Tangle Lakes District, Alaska: U.S. Geological Survey Open-File Report 2008–1260, 58 p.
iii

Contents

Introduction and Landscape Setting ..........................................................................................................1

Objectives...............................................................................................................................................1

Terrain, Vegetation, and Hydrology....................................................................................................1

Geologic Framework ............................................................................................................................4

Soils. ....................................................................................................................................................5

Methods...........................................................................................................................................................5

Stream-Water Samples .......................................................................................................................8

Sediment Chemistry and Mineralogy, and Bedrock Samples.......................................................9

Soil, Soil-Water, and Vegetation Samples ........................................................................................9

Data. ...........................................................................................................................................................13

General Analytical and Site Information.........................................................................................13

Stream Water Chemistry ...................................................................................................................14

Sediment Chemistry and Mineralogy ..............................................................................................14

Soils and Soil Water ..........................................................................................................................14

Vegetation ............................................................................................................................................14

Bedrock ................................................................................................................................................14

Acknowledgments ......................................................................................................................................14

References Cited..........................................................................................................................................14

Figures

Figure 1. Map showing Mount Hayes quadrangle, east-central Alaska, with the 

location of the Tangle Lakes study area ................................................ 2

Figure 2. Map showing study area with generalized hydrologic features in the 

Mount Hayes quadrangle, east-central Alaska, Tangle Lakes study area............ 3

Figure 3. Map showing study area in the Mount Hayes quadrangle, east-central Alaska, 

showing locations of sampling sites ...................................................... 6

Figure 4. Photograph of a U.S. Geological Survey scientist sampling surface water at a 

site south of Eureka Creek, at approximately 3,700-ft elevation, showing 

general lack of new-growth vegetation (June 20–24, 2006), and presence of 

snow fields ................................................................................. 8

Figure 6. Photograph of a U.S. Geological Survey scientist at sampling site 06AK06LG ...... 10

Figure 5. Photograph of the apparatus used for collecting soil water........................... 10
iv

Tables

Table 1. Map numbers of sampling sites and corresponding field identifiers (field No.) for 

samples taken at the site, Tangle Lakes District, Alaska .............................. 7

Table 2. Analytical methodology for stream-sediment, stream-water, soil, soil-water, 

vegetation and bedrock samples ......................................................... 11

Table 3. Detection limits of analytical methods used in chemical analyses for streamsediments, stream-waters, soil, soil-water, vegetation, and bedrock samples, 

Tangle Lakes District, Alaska............................................................... 11

Table 4. Map, laboratory, and field numbers, site latitude and longitude, field 

parameters and discharge for surface-water sampling sites, Tangle 

Lakes District, Alaska ..................................................................... 13

Table 5. Map, laboratory, and field numbers, sample treatment, site latitude and 

longitude, and cation and trace-element chemistry of filtered (FA) and 

unfiltered (RA) acidified surface-water samples, Tangle Lakes District, Alaska ... 16

Table 6. Map and field numbers, major anion chemistry of filtered unacidified (FU) 

surface water samples, Tangle Lakes District, Alaska ................................. 37

Table 7. Map, laboratory, and field numbers, site latitude and longitude, and alkalinity 

reported as calcium carbonate of unfiltered and filtered unacidified surface 

water samples, Tangle Lakes District, Alaska .......................................... 38

Table 8. Map and field numbers, site latitude and longitude, location descriptions, 

and chemistry of composited stream-sediment samples, Tangle Lakes 

District, Alaska .............................................................................. 39

Table 9. Map and field numbers, site latitude and longitude, location descriptions, and 

mineralogy of panned-concentrate samples of stream-sediments, Tangle Lakes 

District, Alaska .............................................................................. 45

Table 10. Map, laboratory, and field numbers, site latitude and longitude, sample 

descriptions, and chemistry of soils, Tangle Lakes District, Alaska .................. 46

Table 11. Map, laboratory, and field numbers, site latitude and longitude, site 

descriptions, and chemistry of soil water, Tangle Lakes District, Alaska ............ 49

Table 12. Map, laboratory, and field numbers, site latitude and longitude, and 

chemistry of soil water, Tangle Lakes District, Alaska ................................. 52

Table 13. Map, laboratory, and field numbers, site latitude and longitude, and major-anion 

chemistry of soil-water samples, Tangle Lakes District, Alaska ..................... 53

Table 14. Map, laboratory, and field numbers, site latitude and longitude, sample 

description, and chemistry of willow leaf material (dry-weight basis), 

Tangle Lakes District, Alaska............................................................... 54

Table 15. Map and field numbers, site latitude and longitude, sample sources and 

descriptions, collection method, and chemistry of bedrock samples, 

Tangle Lakes District, Alaska............................................................... 55
v

Conversion Factors, Datums, and Abbreviations

Conversion Factors

Multiply By To obtain

meter (m) 3.281 foot (ft) 

kilometer (km) 0.6214 mile (mi)

kilometer (km) 0.5400 mile, nautical (nmi) 

square kilometer (km2

) 0.3861 square mile (mi2)

Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as follows:

°F=(1.8×°C)+32.

Datums

Horizontal coordinate information is referenced to the bedrock samples, Tangle Lakes District, 

Alaska. “North American Datum of 1927, Alaska (NAD 27 Alaska)”

Altitude, as used in this report, refers to distance above the vertical datum.

Abbreviations

Abbreviation Meaning

L liter

mg/L milligram per liter

μg/L microgram per liter

ng/L nanogram per liter

μm micrometer

μg/g microgram per gram

ng/g nanogram per gram

mg/kg milligram per kilogram

μS microSiemens

ppb part per billion

ppm part per million
vi

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Regional Geochemical Results from Analyses of 

Stream-Water, Stream-Sediment, Soil, Soil-Water, 

Bedrock, and Vegetation Samples, Tangle Lakes District, 

Alaska

By Bronwen Wang1, L.P. Gough2, R.B. Wanty3, G.K. Lee3, James Vohden4, J.M. O’Neill3, and L.J. Kerin4

Introduction and Landscape Setting

We report chemical analyses of stream-water, streamsediment, soil, soil-water, bedrock, and vegetation samples 

collected from the headwaters of the Delta River (Tangle 

Lakes District, Mount Hayes 1:250,000-scale quadrangle) 

in east-central Alaska for the period June 20–25, 2006. 

Additionally, we present mineralogic analyses of stream 

sediment, concentrated by panning. The study area includes 

the southwestward extent of the Bureau of Land Management 

(BLM) Delta River Mining District (Bittenbender and others, 

2007), including parts of the Delta River Archeological 

District, and encompasses an area of about 500 km2

(approximately bordered by the Denali Highway to the south, 

near Round Tangle Lake, northward to the foothills of the 

Alaska Range (fig. 1). The primary focus of this study was 

the chemical characterization of native materials, especially 

surface-water and sediment samples, of first-order streams 

from the headwaters of the Delta River. 

The impetus for this work was the need, expressed 

by the Alaska Department of Natural Resources (ADNR), 

for an inventory of geochemical and hydrogeochemical 

baseline information about the Delta River Mining District. 

This information is needed because of a major upturn 

in exploration, drilling, and general mineral-resources 

assessments in the region since the late 1990s. Currently, the 

study area, called the “MAN Project” area is being explored 

by Pure Nickel, Inc. (http://www.purenickel.com/s/MAN_

Alaska.asp), and includes both Cu-Au-Ag and Ni-Cu-PGE 

(Pt-Pd-Au-Ag) mining claims.

Geochemical data on surface-water, stream-sediment, 

soil, soil-water, grayleaf willow (Salix glauca L.), and limited 

bedrock samples are provided along with the analytical 

methodologies used and panned-concentrate mineralogy. 

We are releasing the data at this time with only minimal 

interpretation.

Objectives

The objectives of U.S. Geological Survey (USGS) and 

ADNR studies in the Delta River Mining District include 

(1) description of chemical signatures imparted to water, 

sediment, soil, and vegetation from the geologic (mineralized 

and nonmineralized) substrate, and (2) estimation of 

geochemical baselines for surface water, sediment, soils, and 

vegetation in selected watersheds before development, if it is 

to occur. 

Terrain, Vegetation, and Hydrology

The Tangle Lakes area of the Delta River Mining District 

is south of the Alaska Range in east-central Alaska about 30 

km west-northwest of the small community of Paxson (figs. 1, 

2). Pure Nickel Inc. (http://www.purenickel.com/s/Home.asp), 

the exploration company that owns most of the claims in this 

area, is in an exploration phase and has not announced when 

it might move beyond this present phase. The activities of 

Pure Nickel, as well as of previous property owners in the area 

(Nevada Star Resources Corp., Anglo American Exploration 

USA, Inc.), have created a renewed interest in understanding 

the tectonic setting and metallogeny of the Cu-Ni-PGE 

deposits present in mafic and ultramafic country rocks of the 

area. 1

 U.S. Geological Survey, 4200 University Drive, Anchorage, Alaska 99508.

2

 U.S. Geological Survey, 12201 Sunrise Valley Drive, MS 954, Reston, 

Virginia 20192-0002. 3

 U.S. Geological Survey, Box 25045, MS 964, Denver Federal Center, 

Denver, Colorado 80225-0046. 4

 Alaska Department of Natural Resources, Division of Mining, Land and 

Water, 3700 Airport Way, Fairbanks, Alaska 99709-4699.
2 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska

Tangle Lakes

Study Area

Paxson

Delta Junction

Cantwell

Dawson

City

Tok

Glennallen

Valdez

Seward

Anchorage

Fairbanks

0 50 100 150 MILES

N

0 100 200 300 KILOMETERS

ALASKA

ALASKA

CANADA

CANADA

Figure 1. Mount Hayes quadrangle, east-central Alaska, with the location of the Tangle Lakes study area.
Introduction and Landscape Setting 3

Sum

mit Lake

Fielding Lake

Tangle

Lakes

Amphitheater

Mountains Sevenmile Lake

145o 30’ 

63o 30’ 

146o 30’ 

63o 00’ 

Black Rapids Glacier

Eureka

Glacier

Canwell Glacier

Eureka Creek

Delta

River

Delta

River

Richardson

Highway

ALASKA 

Tangle Lakes 

study area 

Denali

Highway

Alaska

Range

0 1 2 3 4 MILES

0 1 2 3 4 KILOMETERS

Figure 2. Study area with generalized hydrologic features in the Mount Hayes quadrangle, east-central Alaska, 

Tangle Lakes study area.
4 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska

The Mount Hayes A-4, A-5, B-4, and B-5 quadrangles, 

where we focused our 2006 field studies, are characterized 

by vegetated, high rugged mountains with scattered, sparsely 

vegetated to barren higher peaks (highest elevations, >1,700 m 

in the Alaska Range foothills). The Delta River, the area’s 

largest stream, drains northward through the Alaska Range 

from Round Tangle Lake. The drainage is narrow and swift 

moving in the south but becomes broad and meandering as 

it leaves the Alaska Range. Eureka Creek, the main tributary 

to the Delta River in the study area (fig. 1), runs west to east, 

and its drainage is narrower and steeper than the Delta River. 

The alpine tundra vegetation of the region (tree line at about 

900 m, well below the elevation of most of the study area) 

is composed of forbs, herbs, and low shrubs (Salix, Betula, 

and Spirea); ground cover is composed of forbs, mosses, and 

lichens. Fires are infrequent, and most of our sampling sites 

did not show evidence of past fire disturbance. The study area 

has an interior Alaska continental climate characterized by 

cool, wet summers, very cold, dry winters, a day length that 

ranges from about 5 hours in December to about 19 hours in 

June, and broad fluctuations in ambient temperature.

Geologic Framework

The Tangle Lakes District, the area drained by Eureka 

Creek and its tributaries between the Denali Highway and the 

foothills of the Alaska Range (figs. 1, 2), is underlain mainly 

by Late Triassic rocks of the Nikolai Greenstone. The area is 

part of the massive Wragellia superterrane that was accreted 

to this part of Alaska in the Late Cretaceous (Nokleberg 

and others, 1994). Nokleberg and others (1994) included 

the Eureka Creek study area in a larger, fault-bounded 

Tangle Lakes subterrane within the much larger Wrangellia 

superterrane of south-central and southeastern Alaska. 

Early geologic investigations were by Rose (1965, 1966) in 

the Rainy Creek area and Amphitheater Mountains in the 

northeastern and southern parts of the study area, respectively, 

and by Stout (1976), who summarized the geology of the 

intervening Eureka Creek area and integrated that geology 

with the work by Rose in the north and south. 

The Nikolai Greenstone, more than 4,000 m thick in the 

Amphitheater Mountains, consists mainly of basalt flows, 

some of which are spectacular pillow basalts, interbedded 

with minor argillite, chert, and mafic volcaniclastic rocks. 

What distinguishes the Nikolai in the Tangle Lakes area 

from equivalent rocks elsewhere in south-central Alaska is 

the presence of large cumulate mafic and ultramafic sills 

that were emplaced mainly into or beneath the overlying 

volcanic sequence. Unconformably underlying the Nikolai 

volcanic rocks (and intruded by the mafic sills and dikes) are 

Pennsylvanian(?) through Triassic limestone, shale, and chert, 

exposed between Eureka and Rainy Creeks in the northeastern 

part of the study area (fig. 1). 

The Nikolai Greenstone and underlying sedimentary 

rocks are folded into the broad, west trending Amphitheater 

syncline, whose axis is in the low-lying area occupied by 

Sevenmile Lake (fig. 2) within the Amphitheater Mountains. 

The syncline plunges gently west and traces eastward to 

Summit Lake. The study area (fig. 1) is bounded on the south 

by the north-dipping limb of this syncline. 

On the northeast, weakly folded Nikolai mafic rocks are 

bounded by the northwest-trending Eureka Fault of Nokleberg 

and others (1992), northeast of which are strongly deformed 

metasedimentary, metavolcanic, and intrusive rocks that 

range in age from Pennsylvanian to Cretaceous. This and 

other faults in the region are mapped as thrust faults (Stout, 

1976; Nokleberg and others, 1992), some of which place 

younger on older sequences. Reconnaissance during this study 

revealed that the faults exposed in Broxson Gulch juxtapose 

the Cretaceous Kahiltna flysch of Stout (1976) against Triassic 

mafic rocks along a wide, nearly vertical shear zone marked 

by abundant subhorizontal slickenlines. The area east and west 

of Broxson Gulch appears to represent a series of tectonic 

slices ranging from Permian pyroclastic flows and tuffs, 

through mafic and ultramafic igneous rocks of uncertain age, 

and possible Cretaceous flysch deposits, to quartz monzonite 

to diorite igneous bodies variously mapped as intrusive rocks 

by Stout (1976) and as fault-bounded tectonic slices by 

Nokleberg and others (1992). Our reconnaissance suggests 

that strike-slip faulting may be a major component of tectonic 

displacements in the Broxson Gulch area.

The Late Triassic Nikolai Greenstone is the main igneous 

rock type exposed in the study area (fig. 1). On the southern 

limb of the Amphitheater syncline, Stout (1976) reported 

approximately 3,500 m of andesitic to mafic mixed volcanic 

rocks and intrusive sills of diabase and diorite; the intrusive 

sills account for about one-third of the thickness of the section. 

The base of this section consists of water-laid tuffs and local 

limestone overlain mainly by volcanic tuffs and agglomerate. 

The upper part of the section consists of pillowed andesite 

flows and minor pillowed basalt flows. The andesitic volcanic 

section is overlain by gray to green basalts that commonly are 

amygdaloidal.

Intruding the Nikolai andesites, basalts, and related 

tuffs is the Fish Lake intrusive complex of Stout, 1976, who 

described this complex as (1) intrusive into the overlying 

volcanic rocks, (2) mafic to ultramafic in composition, and 

(3) probably a layered differentiated ultramafic sill. The 

peridotites examined by Stout are associated with secondary 

serpentinite, chrome spinel, and clinopyroxene layers. 
Methods 5

Exploration geologists from the Nevada Star Resource Group 

(Larry Hulbert, oral commun., 2006) have mapped ultramaficlayered zones within the complex, including peridotites 

that consist of dunite, wehrlite, and feldspathic wehrlite 

and pyroxenites that consist of olivine clinopyroxenite and 

clinopyroxenite, all of which show cumulate textures. The 

ultramafic rocks are associated with gabbro, olivine gabbro, 

and troctolite that are locally transitional into feldspathic 

peridotite and that locally display cumulate textures. The Fish 

Lake complex intrudes the Late Triassic Nikolai Greenstone; 

these rocks are now considered to represent a comagmatic 

phase of Late Triassic mafic volcanism that intruded the 

overlying volcanic carapace (Nokleberg and others, 1994). 

Younger, quartz monzonite to diorite intrusive bodies are 

present in the Tangle Lakes district only in the area northeast 

of the Eureka Fault and specifically adjacent to the Broxson 

Gulch area. The age of these rocks is uncertain, and they 

have been mapped as both Cretaceous and Tertiary intrusions 

and as fault-bounded tectonic slices (Stout, 1976; Nokleberg 

and others, 1992). Southwest of the Eureka Fault, a northto northeast-trending fracture system that cuts across the 

Amphitheater Mountains includes fractures locally filled with 

quartz veins as much as 30 cm thick (Stout, 1976). 

Base metal, disseminated Cu, and associated Fe sulfides, 

such as those that occur west of the study area (fig. 1) and 

west of the Maclaren River (Kathleen-Margaret Cu deposit) 

are absent in the Eureka Creek area. Sulfide-bearing veins do 

occur in the study area but have attracted little attention. Most 

of these veins occur along or near the axis of the Amphitheater 

syncline, south of the Eureka Fault, in association with quartzfilled fractures. Stout (1976) reported that some veins contain 

chalcopyrite, bornite, malachite, and azurite, some of which 

occur as pods as much as 2.5 cm across. Stout noted that 

several Cu-Ni occurrences were known at that time and that 

these occurrences were closely associated with the Fish Lake 

ultramafic intrusive complex.

Since 1991, several exploration companies have 

undertaken mapping, sampling, and core drilling in the Tangle 

Lakes district, all focused on the Fish Lake intrusive complex. 

Currently, Pure Nickel, Inc., which owns mineral rights 

within the area, reports showings as much as 15.4 weight 

percent Ni, 7.19 weight percent Cu, and 170 g of platinumgroup elements (PGE) + Au + Ag per tonne. Pure Nickel has 

subdivided the Tangle Lakes district into three metallogenic 

areas: (1) the broadly folded Nikolai Greenstone area (Ni-CuPGE) southwest of the Eureka Fault that includes all of the 

Amphitheater Mountains, (2) the complexly faulted and 

strongly folded multilithologic area (Ni-Cu-PGE) northeast 

of the Eureka Fault, and (3) a small area (Cu-Au) directly east 

of Broxson Gulch where tectonic slices of both sedimentary 

rocks and mafic and felsic igneous rocks of all ages and 

compositions are exposed.

Mineral resource investigations of the study area (fig. 1) 

are being carried out by exploration companies and BLM 

(Bean and others, 2004; Bittenbender and others, 2007). 

Soils

Soils at our sampling sites are classified as Orthels 

(Gelisols) and only occasionally as Cryepts (Inceptisols). 

More than 50 percent of our sampling sites were very moist 

at the time of collection, and permafrost, when present, was 

commonly observed at 15- to 50-cm depth. Most sites had 

silty to fine-sandy-loam A soil horizons with abundant root 

penetration. The A horizon was commonly less than 10 

cm thick and dark brown (organic rich); the B horizon was 

generally about as thick as the A horizon, lighter and redder, 

and contained moderate root volume; the C soil horizons, 

which commonly extended below 20- to 40-cm deep, 

consisted of fine to coarse sand with small blocks of angular 

bedrock and few roots. The universal presence of silt (eolian 

loess) in the soil horizons plays an important role in the 

definition of soil-geochemical signatures. We tried to collect 

mature, residual soils wherever possible. Although some of the 

soils collected had developed from alluvium, most sampling 

sites were intentionally located well above contemporary flood 

levels on slopes no steeper than 15 percent. Geomorphic signs 

of downslope soil movement (solifluction lobes and outwash 

fans), however, indicate that the upper horizons of many of 

these soils were mostly colluvial in origin. Cryoturbation, 

most commonly signaled by the presence of hummocks, was 

universally observed.

Methods

Samples of stream water, stream sediment, soil, soilwater, bedrock, and vegetation were collected for chemical 

analysis at various sites in the study area (fig. 3; table 1). 

Surface-water samples were collected at 30 sites. Near 22 

of the surface–water-sampling sites, stream sediment was 

collected for chemical analysis (fig. 4); and at 17 sites both 

stream-sediment and pan concentrates were collected for 

chemical and mineralogical analyses, respectively. Soil and 

soil-water samples were collected for chemical analysis near 

five stream–water-sampling sites, and grayleaf willow (Salix 

glauca L.) was sampled at six sites. The stream-sediment and 

stream-water samples were specifically targeted to elucidate 

the geochemical signature of the ultramafic rocks of the study 

area (fig. 1). 
6 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska

MH1

MH30

MH19

MH18

MH17

MH11

MH12

MH16

MH2

MH3

MH4

MH5

MH6

MH10

MH7 MH8

MH9 MH20

MH13

MH15

MH14

MH29

MH28 MH27

MH24 MH23 MH26

MH22

Black Rapids Glacier

Round Tangle

Lake

Summit

Lake

63o 30’

145o 30’

63o 30’

63o 00’

146o 30’

63o 00’

145o 30’

MH25

MH21

Denali Highway

Richardson

Highway

Sevenmile Lake

Miles

Kilometers

0 1

1

2

2

3

3

4

0 4

MH31

MH32

MH33

MH24

Site location and

 identifier

146o 30’

Figure 3. Study area in the Mount Hayes quadrangle, east-central Alaska, showing locations of sampling sites. 

See tables 4 through 15 for precise coordinates and types of material sampled at each site.
Methods 7

Table 1. Map numbers of sampling sites and corresponding field identifiers (field No.) for samples taken at the site, 

Tangle Lakes District, Alaska. 

[Map Nos. are shown in figure 3. For exact sampling location see tables 4–14. Field No: Water: in tables 4, 5, and 6, the prefix is followed 

by the field treatment designator indicating that sample was: (1) 0.1FA if passed through 0.1-μm filter and acidified; 0.45FA if passed through 

0.45-μm filter and acidified, and RA if unfiltered and acidified; (2) 0.45FU if passed through 0.45-μm filter but not acidified; (3) RU if 

unfiltered and not acidified. Sediment and mineralogy: in tables 7 and 8, prefix is followed by SS for stream sediment, SD for stream-sediment 

duplicate, SC for stream-sediment panned concentrate. Soil: in table 9, prefix is followed by A, B, or C designating horizon sampled. Soil 

water: in tables 10, 11, and 12, prefix is followed by C or A indicating samples for cation and anion analysis, respectively. All samples were 

filtered through 0.45 μm filter. Cation samples were acidified; anion samples were not acidified. Vegetation: in table 13, prefix is followed by 

W indicating willow samples. Abbreviation: μm, micrometer] 

Map

No.

Field No.

Water Sediment and 

mineralogy Soil Soil water Vegetation Bedrock 

MH1 06AK01 06GL078 – – – –

MH2 06AK02 06GL079 – – – –

MH3 06AK03 06GL080 – – – –

MH4 06AK04 06GL081 – – – –

MH5 06AK05 – – – – –

MH6 06AK06 06GL082 – – – –

MH7 06AK07 06GL083 – – – –

MH8 06AK08 – – – – –

MH9 06AK09 06GL084 – – – –

MH10 06AK10 06GL085 – – – –

MH11 06AK11 06GL086 – – – –

MH12 06AK12 06GL087 – – – –

MH13 06AK13 06GL088 – – – –

MH14 06AK14 06GL089 – – – –

MH15 06AK15 06GL090 – – – –

MH16 06AK16 06GL091 – – – –

MH17 06AK17 06GL092 – – – –

MH18 06AK18 06GL093 – – – –

MH19 06AK19 06GL094 – – – –

MH20 06AK20 06GL095 – – – –

MH21 06AK06LG – 06AK06 06AK06L1 06AK06 –

MH22 06AK07LG – 06AK07 06AK07L1 06AK07 –

MH23 06AK08LG – 06AK08 06AK08L1 06AK08 –

MH24 06AK09LG – 06AK09 06AK09L1 06AK09 –

MH25 06AK10LG – 06AK10 06AK10L1 06AK10 –

MH26 06AK11LG – – – 06AK11 –

MH27 06AK12LG – – – – –

MH28 06AK13LG 06AK13LG – – –

MH29 06AK14LG 06AK14LG – – –

MH30 06AK15LG – – – –

MH31 – – – – – 06GL077R

MH32 – – – – – 06GL092R

MH33 – – – – – 06GL094R
8 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska

tac08-5130_fig04.ai

Figure 4. Photograph of a U.S. Geological Survey scientist sampling surface water at a site south of Eureka Creek (fig. 2), at 

approximately 3,700-ft elevation, showing general lack of new-growth vegetation (June 20–24, 2006), and presence of snow 

fields.

Stream-Water Samples

Water samples were collected as depth- and widthintegrated composite samples. Waters were filtered through a 

0.45-μm syringe-end filter fitted to a 60 mL syringe. Samples 

for major-cation (Ca, Mg, K, Na) and trace-element analyses 

were preserved with ultra-high-purity HNO3; samples for 

major-anion (SO4

2-, Cl-

, F-, NO3

-

) analyses were filtered but 

not acidified. Alkalinity (as CaCO3) samples were either 

filtered and not acidified or unfiltered and not acidified. Water 

conductivity, pH, and temperature were measured in the field 

by using standard pH and conductivity meters and submersible 

thermometers. Stream discharge was measured in cross section 

by using the cross-sectional area, and velocity was determined 

by using a pygmy meter.

For water samples, major-cations and trace-element 

contents were determined by inductively coupled plasma mass 

spectrometry (ICP-MS), and major–anion contents by ion 

chromatography (IC) (Lamothe and others, 2002; Theodorakos 

and others, 2002). Alkalinity was determined by using a 

preset–end-point (pH 4.5) autotritration system (Theodorakos 

and others, 2002). Laboratory procedures require instrument 

calibration with appropriate standards for the elements to 

be reported. In general, the instrumentation calibration and 

quality-control procedures for the laboratory are (1) daily 

hardware and software checks to ensure that the instrument 

and its components are working properly; (2) calibration of the 

instrument to appropriate standards; (3) analysis of standard 

reference materials (aqueous standard reference materials 
Methods 9

are from the USGS Water Resource Division; see http://bqs.

usgs.gov/SRS/); (4) analysis of samples, with every tenth 

sample designated a calibration-check solution (that is, a 

calibration standard run as a sample); and (5) recalibration of 

the instrument and running of standard reference materials. 

Each run concludes with the analysis of a standard reference 

material (Paul Lamothe, U.S. Geological Survey, oral 

commun., 2008). 

Sediment Chemistry and Mineralogy, and 

Bedrock Samples

All stream-sediment samples consisted of fine alluvium 

from the active stream channel, primarily from first-order 

streams as shown on USGS 1:63,360-scale topographic 

maps. Each sample was a composite of material collected 

from several places along a 10-m reach of the channel at 

the sampling site. Approximately 0.9 kg of material was 

collected in a cloth bag, and the samples were air-dried. 

The samples were shipped to the USGS Mineral Resources 

Program’s Laboratory in Denver, Colo., for analysis. Before 

analysis, dried sediment samples were sieved to minus-80-

mesh (0.177 mm); the coarse fraction was discarded, and the 

fine fraction was ground with ceramic plates to minus-100 

mesh (0.149 mm). Clean quartz sand was pulverized between 

the sediment samples to reduce risk of cross-contamination 

(Peacock and others, 2002). For each sample, approximately 

185 g was saved for chemical analysis; any remaining material 

was archived. 

The ground-sediment samples were digested by using a 

four-acid digestion; digests were analyzed by ICP-MS using 

the methods of Crock and others (1983), Briggs and Meier 

(2002), and Lamothe and others (2002). Hg-Au, and Pd-Pt 

were analyzed in separate splits of the sediment samples. 

Sediment samples for Hg analysis were digested with HNO3

-

Na2Cr2O7 and Hg contents were determined by cold-vapor 

atomic-absorption spectrometry (CV-AAS) (Brown and others, 

2002). Au, Pd, and Pt were quantitated by ICP-MS analysis 

after collection by fire assay. A 30-g aliquot was weighed into 

a crucible with 150 g of flux and mixed; 1 mg of AgNO3

 was 

added and covered with borax, and then the sample was placed 

in the furnace for 45 minutes at 1,080°C. The melt was poured 

into a cast-iron mold, cooled, and hammered to free the lead 

button from the slag. The lead button was heated at 950oC until 

all the lead was removed. The resulting bead was dissolved in 

a HNO3-HCl and heated in a waterbath. The final solution was 

adjusted to 10 mL and introduced into the ICP-MS.

Heavy-mineral panned-concentrate samples were 

collected from active alluvium at most stream-sedimentsampling sites; however, a higher-energy depositional 

environment, such as coarser gravel, was sought to provide a 

more favorable environment for collecting heavy (high specific 

gravity) minerals. A 36-cm-diameter plastic gold pan was 

filled with approximately 7 kg of alluvium and panned on site 

until many of the lighter minerals (those with a lower specific 

gravity, such as quartz and feldspar, along with organic 

material and clays) were removed. The resulting concentrate 

was examined with 10x and 14x hand lenses in the field and 

collected in a plastic bag that was covered by a protective 

paper envelope. 

The concentrate samples were analyzed in the USGS 

Mineral Resources Program’s laboratory in Denver, Colo., 

where they were air dried and sieved to minus-30 mesh (0.6 

mm) and then gravity separated by using bromoform (specific 

gravity, about 2.85) to remove any remaining light minerals, 

primarily quartz and feldspar. The resulting heavy-mineralconcentrate sample was separated into magnetic, weakly 

magnetic, and nonmagnetic fractions, using a modified Frantz 

Isodynamic Separator (Taylor and Theodorakos, 1996). The 

magnetic fraction, which was extracted at a setting of 0.25 

A contains primarily magnetite and ilmenite; the weakly 

magnetic fraction, which was extracted at a setting of 1.75 A 

consists largely of ferromagnesian silicates and Fe oxides; and 

the remaining nonmagnetic fraction may contain many orerelated minerals, including sulfide minerals, gold and other 

native metals, and some accessory oxides and silicates. The 

mineral content of nonmagnetic heavy-mineral-concentrate 

samples was determined by visual identification through a 

binocular microscope.

Bedrock samples were collected from outcrop localities 

near stream-sediment-sampling sites where alteration or 

mineralization was observed. The samples were analyzed 

in the USGS Mineral Resources Program’s laboratory in 

Denver, Colo. Samples were reduced to 1/2-cm fragments 

in a jaw crusher, and the crushed samples were ground to 

minus-100 mesh and subsequently chemically analyzed for 

major and trace elements using the techniques of Taylor and 

Theodorakos, 2002. 

Soil, Soil-Water, and Vegetation Samples

Soil- and vegetation-sampling sites were selected on the 

basis of the following landscape and soil criteria: (1) sites 

possessed soils developed over a known lithologic unit; (2) 

sites were low in peat; (3) if permafrost was present, depth 

to frost layer was more than 30 cm; (4) if over Quaternary 

deposits, sites were composed of colluvium and not alluvium 

(above and out of the flood plain); and (5) soils were mature 

to the point of having recognizable horizontal development. 

Sites were also selected based on the following ecosystem 

and vegetation criteria: (1) sites were from open alpine 

tundra, and (2) sites were as well drained as possible for the 

area (generally with a southerly or ridge-crest exposure). 

Commonly, the sites were well drained if they lacked 

permafrost. At least one soil-collection pit was dug at each 

sampling site. Where available, samples of A1, B, and C soil 
10 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska

horizon material (about 1 kg) were collected by using a spade, 

mixed separately with a plastic spatula and bucket, and placed 

in paper USGS soil-sample bags. In the laboratory, the soils 

were mechanically disaggregated, sieved to 10 mesh (2 mm), 

and the minus-10 mesh material was further ground to pass a 

100 mesh (150 μm) sieve. The ground material was then used 

for all total chemical analyses. 

Ceramic-cup lysimeters were used in the collection of 

all soil pore water (figs. 5, 6). Before leaving for the field, the 

lysimeter tubes, cups, and O-rings were mounted and flushed 

(allowed to “drip”) as follows: five volumes (about 60 mL) 

with 1 volume percent reagent-grade HCl, two volumes 

with 1 volume percent ultrapure HCl, and four volumes with 

nanopure water. The apparatus was then disassembled, soaked 

in 1 volume percent ultrapure HCl, and rinsed with three 

flushes of laboratory nanopure water. In the field, before use, 

the assembled apparatus was again flushed 10 times with 

laboratory distilled-deionized (DI) water. Teflon tape was used 

to ensure a proper seal for the ceramic cup and vacuum hose. 

The complete apparatus was packed in plastic for transport to 

the field. 

In the field, areas of small wet-weather drainages were 

probed to locate soils with a depth of at least 35–40 cm. (The 

depth was commonly dictated by the presence of permafrost 

or bedrock.) Once a sampling site was located, a steel soil 

corer was used to make a hole in the soil with the proper 

diameter for insertion of the apparatus (ceramic cup and tube 

extension). The apparatus was always inserted into the C 

soilhorizon. 

At sites with what appeared to be minimal soil water, 

the ceramic cups were coated with silica flour. (Cups were 

moistened with DI-distilled water so that the flour would stick 

tac08-5130_fig05.ai

Figure 5. Photograph of the apparatus used for collecting 

soil water. After the application of a vacuum, soil water moves 

from soil through a ceramic cup into plexiglass tubing. Note 

level of water column in clear plexiglass tube.

Figure 6. Photograph of a U.S. Geological Survey scientist at sampling 

site 06AK06LG. Elevation is approximately 4,000 ft. (21,219 m).

to the cup.) At sites with adequate soil water, the 

cups were not coated. The silica flour was supposed 

to ensure a tighter union of the cup with the soil.1

Once inserted, a vacuum of 700–900 mbars was 

applied to the apparatus, and the cups and tubes were 

allowed to fill for about 20 minutes, extracted and 

emptied, and then reinserted into the soil to obtain 

the final sample. The tubes normally took from 2–4 

hours to fill completely (50-60 mL). 

Once filled, the apparatus was removed from 

the soil, and the soil water was filtered through a 

0.45-μm filter and then transferred to three bottles: 

30 mL (cation determination; several drops of 

ultrapure HCl were added to ensure that no elements 

were adsorbed onto the bottle wall), 15 mL (anion 

determination), and 15 mL with no headspace (pH 

and conductivity determinations measured the same 

day back at camp). The bottles for cation and anion 

determinations were analyzed in the USGS Mineral 

Resources Program’s laboratory in Denver, Colo. 

1

 By ICP-MS analysis, the flour was found to be essentially 

devoid of trace elements.
Methods 11

Table 2. Analytical methodology for stream-sediment, stream-water, soil, soil-water, vegetation and bedrock samples.

[Methods follow those detailed in Crock and others (1999) and Taggart (2002)]

Parameter Method

Ag, Al, As, Ba, Be, Bi, Ca, Cd, Ce, Co, Cr, Cs, Cu, Dy, Er, Eu, Fe, Ga, Gd, Ge, Ho, K, La, Li, Lu, Mg, Mn, Mo, Na, 

Nb, Ni, P, Pb, Pr, Rb, Sb, Sc, Se, SiO2

, Sm, SO4

2-, Sr, Ta, Tb, Th, Ti, Tl, Tm, U, V, Y, and Zn content

ICP-MS1

Ag, Al, As, Ba, Be, Bi, Ca, Cd, Ce, Co, Cr, Cs, Cu, Fe, Ga, K, La, Li, Mg, Mn, Mo, Na, Nb, Ni, P, Pb, Rb, Sb, Sc, Sr, 

Th, Ti, Tl, U, V, Y, and Zn content

ICP-MS2

Ag, Al, As, B, Ba, Be, Bi, Ca, Cd, Co, Cr, Cs, Cu, Fe, K, Li, Mg, Mn, Mo, Na, Ni, P, Pb, SO4

2-, Sr, Ti, V, and Zn 

content

ICP-AES3

Au, Pd, and Pt content FA-ICPMS4

Hg content CV-AAS5

Ash yield GRAV6

1

 Inductively coupled plasma mass spectrometry on aqueous samples.

2

 Inductively coupled plasma mass spectrometry on solid samples with acid digestion.

3

 Inductively coupled plasma atomic-emission spectrometry on aqueous samples.

4

 Flame-assay inductively coupled plasma mass spectrometry.

5

 Cold-vapor atomic-absorption spectroscopy.

6

 Gravimetric analysis. 

Table 3. Detection limits of analytical methods used in chemical analyses for stream-sediments, stream-waters, soil, soil-water, 

vegetation, and bedrock samples, Tangle Lakes District, Alaska.

[Abbreviations: ICP-MS, inductively coupled plasma-mass spectrometry; ICP-AES, inductively coupled plasma-atomic emission spectrometry; μg/L, 

microgram per liter; ppm, part per million; ppb, part per billion; –, not analyzed by method]

Parameter

ICP-MS detection limits ICP-AES Cold-vapor-atomic-absorption 

spectroscopy

Flame-assay-inductively 

coupled plasma-mass 

spectrometry

Aqueous phase samples 

(μg/L)

Solid phase sediment, soil, 

vegetation and 

bedrock samples 

(ppm)

Aqueous phase 

samples 

(μg/L)

Solid phase sediment, 

soil, vegetation and 

bedrock samples 

(ppm)

Solid phase sediment, 

soil, vegetation and 

bedrock samples 

(ppb)

Au – – – – 1

Pd – – – – 1

Pt – – – – .5

Hg – – – 0.02 –

Ag 0.3 < 0.01 – – –

Al 2 50 10 – –

As 1 1 50 – –

B – – 5 – –

Ba .2 .2 1 – –

Be .05 .03 10 – –

Bi .2 .06 – – –

Soil-water major ions and trace elements were analyzed by 

using the same techniques as for stream water. In addition, 

major-cation and trace-element contents in the soil water were 

also determined by ICP-AES (Briggs and Meier, 2002). 

Samples of the terminal 10–15 cm of the stems with 

leaves of grayleaf willow (Salix glauca L.) were clipped with 

stainless-steel shears and placed in Hubco polypropylene/

cotton sample bags. These samples usually were collected in 

close proximity to the soil-collection pit. The willow leaf was 

separated from the stem, and the leaf material was retained for 

analysis. One to four individual plants were collected at each 

site and composited. In the laboratory, the leaf material was 

dried at ambient temperature, ground in a Wiley mill to pass 

a 2-mm screen, and an aliquot ashed at 500°C. The ash was 

digested and analyzed by the methods of Crock and others 

(1999) and Taggart (2002). 

The analytical methodologies used for stream-water, 

stream-sediment, soil, soil-water, bedrock, and vegetation 

samples are listed in table 2, and current detection limits are 

listed in table 3. All analyses were performed in the USGS 

Mineral Resources Program’s laboratory in Denver, Colo. 

Details of the protocols used were described by Crock and 

others (1999) and Taggart (2002). 
12 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska

Table 3. Detection limits of analytical methods used in chemical analyses for stream-sediments, stream-waters, soil, soil-water, 

vegetation, and bedrock samples, Tangle Lakes District, Alaska.—Continued

[Abbreviations: ICP-MS, inductively coupled plasma-mass spectrometry; ICP-AES, inductively coupled plasma-atomic emission spectrometry; μg/L, 

microgram per liter; ppm, part per million; ppb, part per billion; –, not analyzed by method]

Parameter

ICP-MS detection limits ICP-AES Cold-vapor-atomic-absorption 

spectroscopy

Flame-assay-inductively 

coupled plasma-mass 

spectrometry

Aqueous phase samples 

(μg/L)

Solid phase sediment, soil, 

vegetation and 

bedrock samples 

(ppm)

Aqueous phase 

samples 

(μg/L)

Solid phase sediment, 

soil, vegetation and 

bedrock samples 

(ppm)

Solid phase sediment, 

soil, vegetation and 

bedrock samples 

(ppb)

Ca .2 100 100 – –

Cd .02 .007 5 – –

Ce .01 .1 – – –

Co .02 .03 10 – –

Cr 1 .5 10 – –

Cs .02 .003 – – –

Cu .5 2 10 – –

Dy .005 – – – –

Er .005 – – – –

Eu .005 – – – –

Fe 50 50 20 – –

Ga .05 .02 – – –

Gd .005 – – – –

Ge .05 – – – –

Ho .005 – – – –

K .03 20 100 – –

La .01 .05 – – –

Li .9 .3 1 – –

Lu .1 – – – –

Mg .01 6 100 – –

Mn .2 .7 10 – –

Mo 2 .05 20 – –

Na < .5 20 100 – –

Nb .2 .1 – – –

Nd .01 – – – –

Ni .4 .3 10 – –

P .01 5 100 – –

Pb .05 .4 50 – –

Pr .01 – – – –

Rb .01 .01 – – –

Sb .3 .04 50 – –

Sc .6 .04 – – –

Se 1 – – – –

SiO2

1

.2 – 100 – –

Sm .01 – – – –

SO4

2- 1

2 – – – –

Sr .5 .8 1 – –

Ta .02 – – – –

Tb .005 – – – –

Th .2 .1 – – –

Ti .5 40 50 – –

Tl .1 .08 – – –

Tm .005 – – – –

U .1 .02 – – –

V .5 .2 10 – –

W .5 – – – –

Y .01 .05 – – –

Yb .005 – – – –

Zn .5 3 10 – –

Zr .2 – – – –
Data 13

Map 

No.

Laboratory

No. Field No. Latitude(°N)

Longitude

(°W)

Date

collected

Field parameter

Discharge

(ft3 Conductivity /s)

(μS/cm) pH Temperature(°C)

MH1 C-285462 06AK01 63.32227 -146.04453 06-21-06 224 7.81 9.0 1.0

MH2 C-285463 06AK02 63.30497 -146.01581 06-21-06 38 7.10 3.0 3.9

MH3 C-285464 06AK03 63.30404 -146.04607 06-21-06 63 7.56 3.0 7.6 

MH4 C-285465 06AK04 63.30370 -146.04990 06-21-06 125 7.56 4.0 20 

MH5 C-285466 06AK05 63.30473 -146.05590 06-21-06 258 7.13 4.5 19 

MH6 C-285467 06AK06 63.29038 -146.04857 06-21-06 129 7.45 4.5 15 

MH7 C-285468 06AK07 63.24325 -146.06044 06-22-06 151 8.09 3.0 .31 

MH7 C-285469 06AK07B 63.24325 -146.06044 06-22-06 151 8.09 3.0 .31 

MH8 C-285470 06AK08 63.24343 -146.06023 06-22-06 159 7.91 2.5 .02 

MH9 C-285471 06AK09 63.23375 -146.07518 06-22-06 26 7.44 4.5 .30 

MH10 C-285472 06AK10 63.23109 -146.02482 06-22-06 45 7.72 6.0 .76 

MH11 C-285473 06AK11 63.25372 -146.17209 06-22-06 33 7.61 5.0 1.8 

MH12 C-285474 06AK12 63.26160 -146.19040 06-22-06 47 7.46 6.0 2.5 

MH13 C-285475 06AK13 63.21561 -145.96478 06-23-06 69 7.91 5.5 .40 

MH14 C-285476 06AK14 63.06788 -145.77942 06-23-06 25 6.77 3.0 .001 

MH15 C-285479 06AK15 63.20863 -145.94130 06-24-06 70 7.74 4.0 .68 

MH16 C-285480 06AK16 63.23763 -146.12909 06-24-06 18 7.16 2.0 .29 

MH17 C-285481 06AK17 63.27634 -146.27193 06-25-06 37 7.43 4.5 .37 

MH18 C-285482 06AK18 63.28515 -146.32445 06-25-06 20 7.43 5.5 .81 

MH19 C-285483 06AK19 63.31868 -146.32762 06-25-06 54 7.85 1.0 1.2 

MH20 C-285484 06AK20 63.22520 -145.93295 06-25-06 91 8.04 5.0 .44 

MH20 C-285485 06AK20B 63.22520 -145.93295 06-25-06 91 8.04 5.0 .44 

MH21 C-285559 06AK06LG 63.07365 -145.74760 06-20-06 – – – 1

.04

MH22 C-285560 06AK07LG 63.09626 -145.75070 06-20-06 77 7.10 9.7 .28 

MH23 C-285561 06AK08LG 63.22570 -146.05507 06-22-06 67 7.60 6.9 1

0.01–0.02

MH24 C-285562 06AK09LG 63.22648 -146.18576 06-22-06 8 7.15 4.7 10.20 

MH25 C-285563 06AK10LG 63.05607 -145.87636 06-23-06 92 7.90 2.6 .28 

MH26 C-285564 06AK11LG 63.22106 -145.91483 06-24-06 102 8.04 3.1 .30 

MH27 C-285565 06AK12LG 63.27527 -146.27946 06-25-06 44 7.59 6.9 4.70 

MH28 C-285566 06AK13LG 63.27890 -146.31895 06-25-06 36 7.38 9.1 2.01 

MH29 C-285567 06AK14LG 63.33512 -146.33614 06-25-06 106 8.14 3.5 1

10

MH30 C-285568 06AK15LG 63.29633 -146.30942 06-25-06 43 7.53 4.5 .96

1

 Discharge estimated.

Data

The analytic major-, minor-, and trace-element data 

for surface waters, stream sediments, soils, soil waters, and 

grayleaf willow (Salix glauca L.) presented in the tables is 

intended as a data release with minimal interpretation. The 

following describes the contents of these tables.

General Analytical and Site Information

Analytical methodologies, current detection limits, and 

map numbers (fig. 3) that correspond to the field number for 

the type of samples collected at each site are listed in tables 1, 

2, and 3, respectively, and major-, minor, and trace-element 

data for the various sample types are listed in tables 4 through 

15. All site descriptions, elevation, and location information 

in these tables are from the field notes and presented without 

alteration or unit conversion.

Table 4. Map, laboratory, and field numbers, site latitude and longitude, field parameters and discharge for surface-water sampling 

sites, Tangle Lakes District, Alaska.

[Map Nos. are shown in figure 3. Abbreviations: μS/cm, microsiemens per centimeter; oN, degrees North; oC, degrees Celsius; ft3.s, cubic foot per second; 

–, no data]
14 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska

Stream Water Chemistry

Map numbers, field numbers, site latitude and longitude, 

field parameters (conductivity, pH, temperature), and 

discharge for surface-water-sampling sites are listed in table 4. 

ICP-MS analyses of filtered and unfiltered, acidified surfacewater samples are listed in table 5 (at back of report). One 0.1 

μm filtered blank showed elevated levels of Al, Ba, Ca, Ce, 

Co, Cu, Dy, Gd, K, La, Li, Na, Nd, Ni, Sc, SO4, Sr, Ta, Y, and 

Zn over raw water samples indicating that contamination was 

introduced during processing or analysis. Consequently, the 

0.1 μm data must be viewed with caution. Contents of major 

anions (F, Cl-, NO3

-

, SO4

2-) in filtered, unacidified samples 

are listed in table 6 (at back of report); alkalinity, expressed 

as CaCl2, is listed separately in table 7 (at back of report), 

whether the alkalinity was measured on a filtered or unfiltered 

sample. 

Sediment Chemistry and Mineralogy

Map numbers, field numbers, site latitude and longitude, 

location descriptions, sample-collection methods, analytical 

methods, and chemical analyses of stream sediment are 

listed in table 8 (at back of report). Mineralogy of panned 

concentrates is described in table 9 (at back of report).

Soils and Soil Water 

Analytical data for soil samples reported on a dry-weight 

basis are listed in table 10 (at back of report). ICP-MS, ICPAES, and IC analyses of soil water are listed in tables 11, 

12, and 13 (at back of report), respectively. ICP-MS is the 

preferred method for trace-element analysis because of the 

lower detection limits for most of these elements, whereas 

ICP-AES has been the preferred analytical method for major 

cations. Recently, the detection limits of ICP-MS for major 

cations have decreased, and so ICP-AES has now largely been 

supplanted by ICP-MS for the determination of major cations. 

Here, we have included the data for major- and trace-element 

contents in soil water by both ICP-MS and ICP-AES.

Vegetation

Analytical data for vegetation samples on a dry-weight 

basis are listed in table 14 (at back of report). Dry-weight 

determinations are considered more biologically relevant and 

are the most common method of measuring elemental contents 

in plants. Conversion to an ash-weight basis can be made 

using the formula: Ca = (Cd

/A) × 100, where Ca is the ashweight element concentration, Cd

 is the dry-weight element 

concentration, and A is the percent ash in the sample. 

Bedrock

Analytical data for bedrock samples are listed in table 15

(at back of report).

Acknowledgments 

We thank Leo Kerin, Brent Martellaro, Jeffrey Rogers, 

and Peter Frantz of the Alaska Department of Natural 

Resources, Division of Mining, Land and Water for their 

support and assistance before and during our fieldwork. We 

thank the U.S. Geological Survey analysts, including Monique 

Adams, Mike Anthony, Zoe Ann Brown, James Crock, and 

Paul Lamothe. Our helicopter pilot Merlin “Spanky” Handley 

was especially skilled and helpful. 

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various pagination, accessed May 7, 2008, at

http://pubs.usgs.gov/of/2002/ofr-02-0223/

Taylor, C.D., and Theodorakos, P.M., 1996, Heavy-mineral 

concentrate preparation by heavy liquid and magnetic 

separation, in Arbogast, B.F., ed., Analytical methods 

manual for the Mineral Resource Surveys Program, U.S. 

Geological Survey: U.S. Geological Survey Open-File 

Report 96-525, p. 15–19.

Taylor, C.D., and Theodorakos, P.M., 2002, Rock sample 

preparation, in Taggart, J.E., Jr., ed., 2002, Analytical 

methods for chemical analysis of geologic and other 

materials, U.S. Geological Survey: U.S. Geological Survey 

Open-File Report 02-223, chap. A1, 5 p., accessed May 7, 

2008, at http://pubs.usgs.gov/of/2002/ofr-02-0223/

Theodorakos, P.M., d’Angelo, W.M., and Ficklin, W.H., 

2002, Fluoride, chloride, nitrate, and sulfate in aqueous 

solution utilizing AutoSuppression chemically suppressed 

ion chromatography, in Taggart, J.E., Jr., ed., Analytical 

methods for chemical analysis of geologic and other 

material, U.S. Geological Survey: U.S. Geological Survey 

Open-File Report 02-223, 7 p., accessed May 7, 2008, at 

http://pubs.usgs.gov/of/2002/ofr-02-0223/
16 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska Table 5. Map, laboratory, and field numbers, sample treatment, site latitude and longitude, and cation and trace-element chemistry of filtered (FA) and unfiltered (RA) acidified surface-water samples, Tangle Lakes District, Alaska. [Map Nos. are shown in figure 3. Surface-water cation and trace-element chemistry determined using inductively coupled plasma-mass spectrometry (ICP-MS). Filter and treatment: 0.1FA, passed through 0.1-μm filter, acidified; 0.45FA, passed through 0.45-μm filter, acidified. Field No.: repl., field replicate. Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; μm, micrometer; mg/L, milligram per liter; <, less than; –, not applicable] Map No. Laboratory No. Field No. Filter and treatment Latitude (°N) Longitude (°W) Date collected Ag

(μg/L)

Al

(μg/L)

As

(μg/L)

Ba

(μg/L)

Be

(μg/L)

Bi

(μg/L)

Ca

(mg/L)

Cd

(μg/L)

0.1 μm filter, acidifed

MH1 C-285462 06AK01-.1FA 0.1FA 63.32227 -146.04453 06-21-06 <3 <2 1 35.3 <0.05 < 0.2 30.6 <0.02

MH2 C-285463 06AK02-.1FA 0.1FA 63.30497 -146.01581 06-21-06 <3 <2 <1 .23 <.05 < .2 5.92 <.02

MH3 C-285464 06AK03-.1FA 0.1FA 63.30404 -146.04607 06-21-06 <3 27.9 <1 .37 <.05 < .2 11.1 <.02

MH4 C-285465 06AK04-.1FA 0.1FA 63.30370 -146.04990 06-21-06 <3 33.3 2 5.97 <.05 < .2 20.2 .06

MH5 C-285466 06AK05-.1FA 0.1FA 63.30473 -146.05590 06-21-06 <3 52.2 3 9.29 <.05 < .2 24.2 .1MH6 C-285467 06AK06-.1FA 0.1FA 63.29038 -146.04857 06-21-06 <3 29.6 2 8.18 <.05 < .2 20.9 .06

MH7 C-285468 06AK07-.1FA 0.1FA 63.24325 -146.06044 06-22-06 <3 <2 91.5 1.04 <.05 < .2 9.06 <.02

C-285469 06AK07-.1FA repl. 0.1FA 63.24325 -146.06044 06-22-06 <3 <2 94.7 1.02 <.05 < .2 9.43 <.02

MH8 C-285470 06AK08-.1FA 0.1FA 63.24343 -146.06023 06-22-06 <3 <2 86.9 1.34 <.05 .38 8.9 <.02

MH9 C-285471 06AK09-.1FA 0.1FA 63.23375 -146.07518 06-22-06 <3 20.1 <1 1.9 <.05 < .2 1.5 <.02MH10 C-285472 06AK10-.1FA 0.1FA 63.23109 -146.02482 06-22-06 <3 10 1 2.1 <.05 < .2 1.92 <.02

MH11 C-285473 06AK11-.1FA 0.1FA 63.25372 -146.17209 06-22-06 <3 19.8 <1 1.62 <.05 < .2 1.56 <.02

MH12 C-285474 06AK12-.1FA 0.1FA 63.26160 -146.19040 06-22-06 <3 11.6 <1 2.42 <.05 < .2 1.89 <.02

MH13 C-285475 06AK13-.1FA 0.1FA 63.21561 -145.96478 06-23-06 <3 3.2 <1 1.41 <.05 < .2 .96 <.02MH14 C-285476 06AK14-.1FA 0.1FA 63.06788 -145.77942 06-23-06 <3 170 <1 4.53 <.05 < .2 2.31 <.02

MH15 C-285479 06AK15-.1FA 0.1FA 63.20863 -145.94130 06-24-06 <3 <2 <1 <.2 <.05 < .2 <.2 <.02

MH16 C-285480 06AK16-.1FA 0.1FA 63.23763 -146.12909 06-24-06 <3 25 <1 1.78 <.05 < .2 1.31 <.02

MH17 C-285481 06AK17-.1FA 0.1FA 63.27634 -146.27193 06-25-06 <3 6.8 <1 4.1 <.05 < .2 3.17 <.02MH18 C-285482 06AK18-.1FA 0.1FA 63.28515 -146.32445 06-25-06 <3 29.8 1 8.73 <.05 < .2 2.47 <.02MH19 C-285483 06AK19-.1FA 0.1FA 63.31868 -146.32762 06-25-06 <3 4.8 28.9 10.3 <.05 < .2 8.98 <.02

MH20 C-285484 06AK20-.1FA 0.1FA 63.22520 -145.93295 06-25-06 <3 3.2 2 4.61 <.05 < .2 3.36 <.02

C-285485 06AK20-.1FA repl. 0.1FA 63.22520 -145.93295 06-25-06 <3 3.2 2 4.66 <.05 < .2 3.32 <.02

C-285477 Blank-ocala-.1FA 0.1FA – – 06-24-10 <3 13.6 <1 2.04 <.05 < .2 1.89 <.02

C-285478 Blank-rich-.1FA 0.1FA – – 06-24-10 <3 <2 <1 <0.2 <.05 .4 <.2 <.02
Table 5 17 Table 5. Map, laboratory, and field numbers, sample treatment, site latitude and longitude, and cation and trace-element chemistry of filtered (FA) and unfiltered (RA) acidified surface-water samples, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. Surface-water cation and trace-element chemistry determined using inductively coupled plasma-mass spectrometry (ICP-MS). Filter and treatment: 0.1FA, passed through 0.1-μm filter, acidified; 0.45FA, passed through 0.45-μm filter, acidified. Field No.: repl., field replicate. Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; μm, micrometer; mg/L, milligram per liter; <, less than; –, not applicable] Map No. Laboratory No. Field No. Filter and treatment Latitude (°N) Longitude (°W) Date collected Ce Co Cr Cs Cu Dy Er Eu 0.1 μm filter, acidifed MH1 C-285462 06AK01-.1FA 0.1FA 63.32227 -146.04453 06-21-06 < 0.01 <0.02 <1 < 0.02 < 0.5 < 0.005 < 0.005 0.006 MH2 C-285463 06AK02-.1FA 0.1FA 63.30497 -146.01581 06-21-06 < .01 <.02 <1 < .02 < .5 < .005 < .005 < .005 MH3 C-285464 06AK03-.1FA 0.1FA 63.30404 -146.04607 06-21-06 < .01 <.02 <1 < .02 < .5 < .005 < .005 < .005 MH4 C-285465 06AK04-.1FA 0.1FA 63.30370 -146.04990 06-21-06 .18 1.85 <1 < .02 17.3 .095 .074 .02 MH5 C-285466 06AK05-.1FA 0.1FA 63.30473 -146.05590 06-21-06 .25 2.32 <1 < .02 24.4 .15 .1 .03 MH6 C-285467 06AK06-.1FA 0.1FA 63.29038 -146.04857 06-21-06 .09 1.3 <1 < .02 9.5 .058 .04 .01 MH7 C-285468 06AK07-.1FA 0.1FA 63.24325 -146.06044 06-22-06 < .01 <.02 3.1 1.28 .55 < .005 < .005 < .005 C-285469 06AK07-.1FA repl. 0.1FA 63.24325 -146.06044 06-22-06 < .01 <.02 3.1 1.27 .63 < .005 < .005 < .005 MH8 C-285470 06AK08-.1FA 0.1FA 63.24343 -146.06023 06-22-06 < .01 <.02 2.4 1.33 .55 < .005 < .005 < .005 MH9 C-285471 06AK09-.1FA 0.1FA 63.23375 -146.07518 06-22-06 .03 .07 <1 .07 1.8 .008 .005 < .005 MH10 C-285472 06AK10-.1FA 0.1FA 63.23109 -146.02482 06-22-06 .01 .03 <1 .38 2.2 .005 < .005 < .005 MH11 C-285473 06AK11-.1FA 0.1FA 63.25372 -146.17209 06-22-06 .03 .02 <1 < .02 1.4 .006 .007 < .005 MH12 C-285474 06AK12-.1FA 0.1FA 63.26160 -146.19040 06-22-06 .02 .02 <1 .02 1.2 < .005 < .005 < .005 MH13 C-285475 06AK13-.1FA 0.1FA 63.21561 -145.96478 06-23-06 < .01 <.02 <1 < .02 1 < .005 < .005 < .005 MH14 C-285476 06AK14-.1FA 0.1FA 63.06788 -145.77942 06-23-06 .15 .07 <1 < .02 4.6 .02 .01 .007 MH15 C-285479 06AK15-.1FA 0.1FA 63.20863 -145.94130 06-24-06 < .01 <.02 <1 < .02 < .5 < .005 < .005 < .005 MH16 C-285480 06AK16-.1FA 0.1FA 63.23763 -146.12909 06-24-06 .03 .02 <1 < .02 .95 .009 .006 < .005 MH17 C-285481 06AK17-.1FA 0.1FA 63.27634 -146.27193 06-25-06 .01 .07 <1 < .02 1.4 < .005 < .005 < .005 MH18 C-285482 06AK18-.1FA 0.1FA 63.28515 -146.32445 06-25-06 .05 .02 <1 .09 1 .01 .01 .005 MH19 C-285483 06AK19-.1FA 0.1FA 63.31868 -146.32762 06-25-06 < .01 .09 1.3 .08 .59 < .005 < .005 < .005 MH20 C-285484 06AK20-.1FA 0.1FA 63.22520 -145.93295 06-25-06 < .01 .05 <1 < .02 2.3 < .005 < .005 < .005 C-285485 06AK20-.1FA repl. 0.1FA 63.22520 -145.93295 06-25-06 < .01 .04 <1 < .02 2.4 < .005 < .005 < .005 C-285477 Blank-ocala-.1FA 0.1FA – – 06-24-10 .02 .04 <1 < .02 2 .005 < .005 < .005 C-285478 Blank-rich-.1FA 0.1FA – – 06-24-10 < .01 <.02 <1 < .02 < .5 < .005 < .005 < .005
18 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska Table 5. Map, laboratory, and field numbers, sample treatment, site latitude and longitude, and cation and trace-element chemistry of filtered (FA) and unfiltered (RA) acidified surface-water samples, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. Surface-water cation and trace-element chemistry determined using inductively coupled plasma-mass spectrometry (ICP-MS). Filter and treatment: 0.1FA, passed through 0.1-μm filter, acidified; 0.45FA, passed through 0.45-μm filter, acidified. Field No.: repl., field replicate. Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; μm, micrometer; mg/L, milligram per liter; <, less than; –, not applicable] Map No. Laboratory No. Field No. Filter and treatment Latitude (°N) Longitude (°W) Date collected Fe Ga Gd Ge Ho K (mg/L) La Li 0.1 μm filter, acidifed MH1 C-285462 06AK01-.1FA 0.1FA 63.32227 -146.04453 06-21-06 <50 < 0.05 < 0.005 < 0.05 < 0.005 0.61 0.01 2.5 MH2 C-285463 06AK02-.1FA 0.1FA 63.30497 -146.01581 06-21-06 <50 < .05 < .005 < .05 < .005 .06 < .01 < .1 MH3 C-285464 06AK03-.1FA 0.1FA 63.30404 -146.04607 06-21-06 <50 < .05 < .005 < .05 < .005 .3 < .01 .1 MH4 C-285465 06AK04-.1FA 0.1FA 63.30370 -146.04990 06-21-06 <50 < .05 .093 < .05 .02 .2 .2 < .1 MH5 C-285466 06AK05-.1FA 0.1FA 63.30473 -146.05590 06-21-06 <50 < .05 .15 < .05 .03 .2 .29 .3 MH6 C-285467 06AK06-.1FA 0.1FA 63.29038 -146.04857 06-21-06 <50 < .05 .052 < .05 .01 .2 .09 < .1 MH7 C-285468 06AK07-.1FA 0.1FA 63.24325 -146.06044 06-22-06 <50 < .05 < .005 < .05 < .005 .85 < .01 13.2 C-285469 06AK07-.1FA repl. 0.1FA 63.24325 -146.06044 06-22-06 <50 < .05 < .005 .05 < .005 .89 < .01 13.9 MH8 C-285470 06AK08-.1FA 0.1FA 63.24343 -146.06023 06-22-06 <50 < .05 < .005 < .05 < .005 .82 < .01 12.6 MH9 C-285471 06AK09-.1FA 0.1FA 63.23375 -146.07518 06-22-06 <50 < .05 .008 < .05 < .005 .1 .02 2 MH10 C-285472 06AK10-.1FA 0.1FA 63.23109 -146.02482 06-22-06 <50 < .05 .009 < .05 < .005 .2 .01 2.3 MH11 C-285473 06AK11-.1FA 0.1FA 63.25372 -146.17209 06-22-06 <50 < .05 .009 < .05 < .005 .07 .02 .2 MH12 C-285474 06AK12-.1FA 0.1FA 63.26160 -146.19040 06-22-06 <50 < .05 .006 < .05 < .005 .1 .01 < .1 MH13 C-285475 06AK13-.1FA 0.1FA 63.21561 -145.96478 06-23-06 <50 < .05 < .005 < .05 < .005 .1 < .01 .6 MH14 C-285476 06AK14-.1FA 0.1FA 63.06788 -145.77942 06-23-06 72 < .05 .02 < .05 .005 .47 .08 < .1 MH15 C-285479 06AK15-.1FA 0.1FA 63.20863 -145.94130 06-24-06 <50 < .05 < .005 < .05 < .005 <.03 < .01 < .1 MH16 C-285480 06AK16-.1FA 0.1FA 63.23763 -146.12909 06-24-06 <50 < .05 .009 < .05 < .005 .06 .03 < .1 MH17 C-285481 06AK17-.1FA 0.1FA 63.27634 -146.27193 06-25-06 105 < .05 .005 < .05 < .005 .04 < .01 < .1 MH18 C-285482 06AK18-.1FA 0.1FA 63.28515 -146.32445 06-25-06 <50 < .05 .01 < .05 < .005 .2 .06 .4 MH19 C-285483 06AK19-.1FA 0.1FA 63.31868 -146.32762 06-25-06 <50 < .05 < .005 .05 < .005 .5 < .01 1.8 MH20 C-285484 06AK20-.1FA 0.1FA 63.22520 -145.93295 06-25-06 <50 < .05 .005 < .05 < .005 .32 < .01 1.8 C-285485 06AK20-.1FA repl. 0.1FA 63.22520 -145.93295 06-25-06 <50 < .05 < .005 < .05 < .005 .32 .01 2.4 C-285477 Blank-ocala-.1FA 0.1FA – – 06-24-10 <50 < .05 .006 < .05 < .005 .1 .02 1.2 C-285478 Blank-rich-.1FA 0.1FA – – 06-24-10 <50 < .05 < .005 < .05 < .005 <.03 < .01 < .1
Table 5 19 Table 5. Map, laboratory, and field numbers, sample treatment, site latitude and longitude, and cation and trace-element chemistry of filtered (FA) and unfiltered (RA) acidified surface-water samples, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. Surface-water cation and trace-element chemistry determined using inductively coupled plasma-mass spectrometry (ICP-MS). Filter and treatment: 0.1FA, passed through 0.1-μm filter, acidified; 0.45FA, passed through 0.45-μm filter, acidified. Field No.: repl., field replicate. Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; μm, micrometer; mg/L, milligram per liter; <, less than; –, not applicable] Map No. Laboratory No. Field No. Filter and treatment Latitude (°N) Longitude (°W) Date collected Lu Mg (mg/L) Mn Mo Na Nb Nd Ni 0.1 μm filter, acidifed MH1 C-285462 06AK01-.1FA 0.1FA 63.32227 -146.04453 06-21-06 < 0.1 11.2 < 0.2 < 2 11 < 0.2 < 0.01 < 0.4 MH2 C-285463 06AK02-.1FA 0.1FA 63.30497 -146.01581 06-21-06 < .1 .91 < .2 < 2 1.05 < .2 < .01 < .4 MH3 C-285464 06AK03-.1FA 0.1FA 63.30404 -146.04607 06-21-06 < .1 2.47 1.7 < 2 2.03 < .2 < .01 2.6 MH4 C-285465 06AK04-.1FA 0.1FA 63.30370 -146.04990 06-21-06 < .1 6.47 29.5 < 2 2.43 < .2 .24 8.7 MH5 C-285466 06AK05-.1FA 0.1FA 63.30473 -146.05590 06-21-06 < .1 8.14 39.6 < 2 2.72 < .2 .35 10.6 MH6 C-285467 06AK06-.1FA 0.1FA 63.29038 -146.04857 06-21-06 < .1 6.4 22.5 < 2 2.54 < .2 .12 7.8 MH7 C-285468 06AK07-.1FA 0.1FA 63.24325 -146.06044 06-22-06 < .1 26.1 < .2 < 2 .91 < .2 < .01 1.7 C-285469 06AK07-.1FA repl. 0.1FA 63.24325 -146.06044 06-22-06 < .1 27.4 < .2 < 2 .95 < .2 < .01 1.7 MH8 C-285470 06AK08-.1FA 0.1FA 63.24343 -146.06023 06-22-06 < .1 26.4 < .2 < 2 1.05 .93 < .01 1.9 MH9 C-285471 06AK09-.1FA 0.1FA 63.23375 -146.07518 06-22-06 < .1 3.67 3.1 < 2 .47 .49 .03 5.3 MH10 C-285472 06AK10-.1FA 0.1FA 63.23109 -146.02482 06-22-06 < .1 6.69 < .2 < 2 .57 .27 .02 8.8 MH11 C-285473 06AK11-.1FA 0.1FA 63.25372 -146.17209 06-22-06 < .1 4.86 .3 < 2 .33 < .2 .04 4.6 MH12 C-285474 06AK12-.1FA 0.1FA 63.26160 -146.19040 06-22-06 < .1 7.54 < .2 < 2 .34 < .2 .02 5.1 MH13 C-285475 06AK13-.1FA 0.1FA 63.21561 -145.96478 06-23-06 < .1 12.6 < .2 < 2 .25 < .2 < .01 4.3 MH14 C-285476 06AK14-.1FA 0.1FA 63.06788 -145.77942 06-23-06 < .1 3.85 1 < 2 .33 < .2 .1 9.5 MH15 C-285479 06AK15-.1FA 0.1FA 63.20863 -145.94130 06-24-06 < .1 < .01 < .2 < 2 <.01 .35 < .01 < .4 MH16 C-285480 06AK16-.1FA 0.1FA 63.23763 -146.12909 06-24-06 < .1 1.93 .3 < 2 .34 .26 .04 1.4 MH17 C-285481 06AK17-.1FA 0.1FA 63.27634 -146.27193 06-25-06 < .1 4.43 3.5 < 2 .5 < .2 .01 9.5 MH18 C-285482 06AK18-.1FA 0.1FA 63.28515 -146.32445 06-25-06 < .1 1.36 < .2 < 2 .66 < .2 .06 2.9 MH19 C-285483 06AK19-.1FA 0.1FA 63.31868 -146.32762 06-25-06 < .1 3.6 1.6 < 2 1.49 < .2 < .01 .6 MH20 C-285484 06AK20-.1FA 0.1FA 63.22520 -145.93295 06-25-06 < .1 14.4 < .2 < 2 .35 < .2 .02 9.2 C-285485 06AK20-.1FA repl. 0.1FA 63.22520 -145.93295 06-25-06 < .1 14.5 < .2 < 2 .36 < .2 .01 9 C-285477 Blank-ocala-.1FA 0.1FA – – 06-24-10 < .1 12.8 .2 < 2 .45 < .2 .02 8 C-285478 Blank-rich-.1FA 0.1FA – – 06-24-10 < .1 < .01 < .2 < 2 <.01 .79 < .01 < .4
20 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska Table 5. Map, laboratory, and field numbers, sample treatment, site latitude and longitude, and cation and trace-element chemistry of filtered (FA) and unfiltered (RA) acidified surface-water samples, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. Surface-water cation and trace-element chemistry determined using inductively coupled plasma-mass spectrometry (ICP-MS). Filter and treatment: 0.1FA, passed through 0.1-μm filter, acidified; 0.45FA, passed through 0.45-μm filter, acidified. Field No.: repl., field replicate. Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; μm, micrometer; mg/L, milligram per liter; <, less than; –, not applicable] Map No. Laboratory No. Field No. Filter and treatment Latitude (°N) Longitude (°W) Date collected P Pb Pr Rb Sb Sc Se SiO2 0.1 μm filter, acidifed MH1 C-285462 06AK01-.1FA 0.1FA 63.32227 -146.04453 06-21-06 < 0.01 <0.05 < 0.01 0.28 0.39 < 0.6 1.2 3.6 MH2 C-285463 06AK02-.1FA 0.1FA 63.30497 -146.01581 06-21-06 < .01 <.05 < .01 .06 <.3 < .6 < 1 5.9 MH3 C-285464 06AK03-.1FA 0.1FA 63.30404 -146.04607 06-21-06 .03 <.05 < .01 .14 <.3 < .6 < 1 6.2 MH4 C-285465 06AK04-.1FA 0.1FA 63.30370 -146.04990 06-21-06 < .01 <.05 .05 .24 <.3 .6 < 1 6.8 MH5 C-285466 06AK05-.1FA 0.1FA 63.30473 -146.05590 06-21-06 < .01 <.05 .07 .32 <.3 .7 < 1 7 MH6 C-285467 06AK06-.1FA 0.1FA 63.29038 -146.04857 06-21-06 < .01 <.05 .02 .26 <.3 .6 < 1 7 MH7 C-285468 06AK07-.1FA 0.1FA 63.24325 -146.06044 06-22-06 .02 <.05 < .01 3.43 3.14 2.9 < 1 29.1 C-285469 06AK07-.1FA repl. 0.1FA 63.24325 -146.06044 06-22-06 < .01 <.05 < .01 3.52 2.94 2.8 < 1 30.4 MH8 C-285470 06AK08-.1FA 0.1FA 63.24343 -146.06023 06-22-06 < .01 <.05 < .01 3.36 3.56 2.7 < 1 27.3 MH9 C-285471 06AK09-.1FA 0.1FA 63.23375 -146.07518 06-22-06 < .01 <.05 < .01 .3 .49 .7 < 1 7.7 MH10 C-285472 06AK10-.1FA 0.1FA 63.23109 -146.02482 06-22-06 < .01 <.05 < .01 .59 .31 1.1 < 1 11.6 MH11 C-285473 06AK11-.1FA 0.1FA 63.25372 -146.17209 06-22-06 < .01 <.05 < .01 .11 <.3 .8 < 1 8.4 MH12 C-285474 06AK12-.1FA 0.1FA 63.26160 -146.19040 06-22-06 < .01 <.05 < .01 .18 <.3 1 < 1 10.7 MH13 C-285475 06AK13-.1FA 0.1FA 63.21561 -145.96478 06-23-06 < .01 <.05 < .01 .24 <.3 .6 < 1 6.8 MH14 C-285476 06AK14-.1FA 0.1FA 63.06788 -145.77942 06-23-06 < .01 <.05 .02 .66 <.3 1 < 1 10.7 MH15 C-285479 06AK15-.1FA 0.1FA 63.20863 -145.94130 06-24-06 < .01 <.05 < .01 < .01 .38 < .6 < 1 < .2 MH16 C-285480 06AK16-.1FA 0.1FA 63.23763 -146.12909 06-24-06 < .01 <.05 .01 .13 <.3 .7 < 1 6.9 MH17 C-285481 06AK17-.1FA 0.1FA 63.27634 -146.27193 06-25-06 < .01 <.05 < .01 .1 <.3 1.1 < 1 11.1 MH18 C-285482 06AK18-.1FA 0.1FA 63.28515 -146.32445 06-25-06 < .01 <.05 .02 .26 <.3 .7 < 1 7.5 MH19 C-285483 06AK19-.1FA 0.1FA 63.31868 -146.32762 06-25-06 .01 <.05 < .01 1.86 <.3 .8 < 1 7.8 MH20 C-285484 06AK20-.1FA 0.1FA 63.22520 -145.93295 06-25-06 < .01 <.05 < .01 .7 <.3 1 < 1 10.2 C-285485 06AK20-.1FA repl. 0.1FA 63.22520 -145.93295 06-25-06 < .01 <.05 < .01 .71 <.3 .9 < 1 10.3 C-285477 Blank-ocala-.1FA 0.1FA – – 06-24-10 < .01 <.05 < .01 .16 <.3 1.1 < 1 11.9 C-285478 Blank-rich-.1FA 0.1FA – – 06-24-10 < .01 <.05 < .01 .01 1.16 < .6 < 1 < .2
Table 5 21 Table 5. Map, laboratory, and field numbers, sample treatment, site latitude and longitude, and cation and trace-element chemistry of filtered (FA) and unfiltered (RA) acidified surface-water samples, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. Surface-water cation and trace-element chemistry determined using inductively coupled plasma-mass spectrometry (ICP-MS). Filter and treatment: 0.1FA, passed through 0.1-μm filter, acidified; 0.45FA, passed through 0.45-μm filter, acidified. Field No.: repl., field replicate. Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; μm, micrometer; mg/L, milligram per liter; <, less than; –, not applicable] Map No. Laboratory No. Field No. Filter and treatment Latitude (°N) Longitude (°W) Date collected Sm SO4 Sr Ta Tb Th Ti Tl 0.1 μm filter, acidifed MH1 C-285462 06AK01-.1FA 0.1FA 63.32227 -146.04453 06-21-06 < 0.01 43 161 < 0.02 < 0.005 < 0.2 0.6 < 0.1 MH2 C-285463 06AK02-.1FA 0.1FA 63.30497 -146.01581 06-21-06 < .01 7 2.66 < .02 < .005 < .2 < .5 <.1 MH3 C-285464 06AK03-.1FA 0.1FA 63.30404 -146.04607 06-21-06 < .01 22 5.9 < .02 < .005 < .2 .6 <.1 MH4 C-285465 06AK04-.1FA 0.1FA 63.30370 -146.04990 06-21-06 .04 41 55 < .02 .01 < .2 .6 <.1 MH5 C-285466 06AK05-.1FA 0.1FA 63.30473 -146.05590 06-21-06 .07 47 80.1 < .02 .02 < .2 .6 <.1 MH6 C-285467 06AK06-.1FA 0.1FA 63.29038 -146.04857 06-21-06 .02 42 58.3 < .02 .008 < .2 .6 <.1 MH7 C-285468 06AK07-.1FA 0.1FA 63.24325 -146.06044 06-22-06 < .01 8 38.5 .07 < .005 < .2 < .5 <.1 C-285469 06AK07-.1FA repl. 0.1FA 63.24325 -146.06044 06-22-06 < .01 9 39.4 .04 < .005 < .2 < .5 <.1 MH8 C-285470 06AK08-.1FA 0.1FA 63.24343 -146.06023 06-22-06 < .01 8 38.7 .2 < .005 < .2 < .5 <.1 MH9 C-285471 06AK09-.1FA 0.1FA 63.23375 -146.07518 06-22-06 < .01 < 2 5.6 .07 < .005 < .2 .6 <.1 MH10 C-285472 06AK10-.1FA 0.1FA 63.23109 -146.02482 06-22-06 < .01 < 2 7.09 .04 < .005 < .2 < .5 <.1 MH11 C-285473 06AK11-.1FA 0.1FA 63.25372 -146.17209 06-22-06 < .01 < 2 5.54 .03 < .005 < .2 < .5 <.1 MH12 C-285474 06AK12-.1FA 0.1FA 63.26160 -146.19040 06-22-06 < .01 < 2 6.29 .02 < .005 < .2 < .5 <.1 MH13 C-285475 06AK13-.1FA 0.1FA 63.21561 -145.96478 06-23-06 < .01 < 2 4.65 < .02 < .005 < .2 < .5 <.1 MH14 C-285476 06AK14-.1FA 0.1FA 63.06788 -145.77942 06-23-06 .02 < 2 9.03 .02 < .005 < .2 1.3 <.1 MH15 C-285479 06AK15-.1FA 0.1FA 63.20863 -145.94130 06-24-06 < .01 < 2 < .5 .04 < .005 < .2 < .5 <.1 MH16 C-285480 06AK16-.1FA 0.1FA 63.23763 -146.12909 06-24-06 < .01 < 2 6.28 .03 < .005 < .2 < .5 <.1 MH17 C-285481 06AK17-.1FA 0.1FA 63.27634 -146.27193 06-25-06 < .01 < 2 9.56 .02 < .005 < .2 < .5 <.1 MH18 C-285482 06AK18-.1FA 0.1FA 63.28515 -146.32445 06-25-06 .02 < 2 12.6 < .02 < .005 < .2 < .5 <.1 MH19 C-285483 06AK19-.1FA 0.1FA 63.31868 -146.32762 06-25-06 < .01 7 48.4 < .02 < .005 < .2 < .5 <.1 MH20 C-285484 06AK20-.1FA 0.1FA 63.22520 -145.93295 06-25-06 < .01 6 11.6 < .02 < .005 < .2 < .5 <.1 C-285485 06AK20-.1FA repl. 0.1FA 63.22520 -145.93295 06-25-06 < .01 6 11.4 < .02 < .005 < .2 < .5 <.1 C-285477 Blank-ocala-.1FA 0.1FA – – 06-24-10 < .01 3 7.61 .03 < .005 < .2 < .5 <.1 C-285478 Blank-rich-.1FA 0.1FA – – 06-24-10 < .01 < 2 < .5 .1 < .005 < .2 < .5 <.1
22 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska Table 5. Map, laboratory, and field numbers, sample treatment, site latitude and longitude, and cation and trace-element chemistry of filtered (FA) and unfiltered (RA) acidified surface-water samples, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. Surface-water cation and trace-element chemistry determined using inductively coupled plasma-mass spectrometry (ICP-MS). Filter and treatment: 0.1FA, passed through 0.1-μm filter, acidified; 0.45FA, passed through 0.45-μm filter, acidified. Field No.: repl., field replicate. Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; μm, micrometer; mg/L, milligram per liter; <, less than; –, not applicable] Map No. Laboratory No. Field No. Filter and treatment Latitude (°N) Longitude (°W) Date collected Tm U V

W

Y Yb Zn Zr

0.1 μm filter, acidifed

MH1 C-285462 06AK01-.1FA 0.1FA 63.32227 -146.04453 06-21-06 < 0.005 0.35 0.7 < 0.5 0.04 < 0.005 1.2 < 0.2

MH2 C-285463 06AK02-.1FA 0.1FA 63.30497 -146.01581 06-21-06 < .005 < .1 <.5 < .5 < .01 < .005 1 < .2

MH3 C-285464 06AK03-.1FA 0.1FA 63.30404 -146.04607 06-21-06 < .005 < .1 .5 < .5 < .01 < .005 125 .3

MH4 C-285465 06AK04-.1FA 0.1FA 63.30370 -146.04990 06-21-06 .008 < .1 .6 < .5 .84 .04 6.7 < .2

MH5 C-285466 06AK05-.1FA 0.1FA 63.30473 -146.05590 06-21-06 .01 < .1 .6 < .5 1.24 .07 8.3 < .2

MH6 C-285467 06AK06-.1FA 0.1FA 63.29038 -146.04857 06-21-06 < .005 < .1 .6 < .5 .43 .02 4.9 < .2

MH7 C-285468 06AK07-.1FA 0.1FA 63.24325 -146.06044 06-22-06 < .005 < .1 .5 < .5 < .01 < .005 .7 < .2

C-285469 06AK07-.1FA repl. 0.1FA 63.24325 -146.06044 06-22-06 < .005 < .1 .5 < .5 < .01 < .005 .5 < .2

MH8 C-285470 06AK08-.1FA 0.1FA 63.24343 -146.06023 06-22-06 < .005 < .1 <.5 1.07 < .01 < .005 .7 < .2

MH9 C-285471 06AK09-.1FA 0.1FA 63.23375 -146.07518 06-22-06 < .005 < .1 <.5 < .5 .04 .005 .6 < .2

MH10 C-285472 06AK10-.1FA 0.1FA 63.23109 -146.02482 06-22-06 < .005 < .1 <.5 < .5 .03 < .005 <.5 < .2

MH11 C-285473 06AK11-.1FA 0.1FA 63.25372 -146.17209 06-22-06 < .005 < .1 <.5 < .5 .05 < .005 .6 < .2

MH12 C-285474 06AK12-.1FA 0.1FA 63.26160 -146.19040 06-22-06 < .005 < .1 <.5 < .5 .02 < .005 .7 < .2

MH13 C-285475 06AK13-.1FA 0.1FA 63.21561 -145.96478 06-23-06 < .005 < .1 <.5 < .5 < .01 < .005 1 < .2

MH14 C-285476 06AK14-.1FA 0.1FA 63.06788 -145.77942 06-23-06 < .005 < .1 <.5 < .5 .12 .01 3.4 .2

MH15 C-285479 06AK15-.1FA 0.1FA 63.20863 -145.94130 06-24-06 < .005 < .1 <.5 < .5 < .01 < .005 <.5 < .2

MH16 C-285480 06AK16-.1FA 0.1FA 63.23763 -146.12909 06-24-06 < .005 < .1 <.5 < .5 .06 .005 .8 < .2

MH17 C-285481 06AK17-.1FA 0.1FA 63.27634 -146.27193 06-25-06 < .005 < .1 <.5 < .5 .03 .005 .7 < .2

MH18 C-285482 06AK18-.1FA 0.1FA 63.28515 -146.32445 06-25-06 < .005 < .1 <.5 < .5 .09 .009 .6 < .2

MH19 C-285483 06AK19-.1FA 0.1FA 63.31868 -146.32762 06-25-06 < .005 .56 <.5 < .5 .01 < .005 .8 < .2

MH20 C-285484 06AK20-.1FA 0.1FA 63.22520 -145.93295 06-25-06 < .005 < .1 <.5 < .5 .03 < .005 <.5 < .2

C-285485 06AK20-.1FA repl. 0.1FA 63.22520 -145.93295 06-25-06 < .005 < .1 <.5 < .5 .02 < .005 .7 < .2

C-285477 Blank-ocala-.1FA 0.1FA – – 06-24-10 < .005 < .1 <.5 < .5 .03 < .005 .8 < .2

C-285478 Blank-rich-.1FA 0.1FA – – 06-24-10 < .005 < .1 <.5 .88 < .01 < .005 .5 < .2
Table 5 23 Table 5. Map, laboratory, and field numbers, sample treatment, site latitude and longitude, and cation and trace-element chemistry of filtered (FA) and unfiltered (RA) acidified surface-water samples, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. Surface-water cation and trace-element chemistry determined using inductively coupled plasma-mass spectrometry (ICP-MS). Filter and treatment: 0.1FA, passed through 0.1-μm filter, acidified; 0.45FA, passed through 0.45-μm filter, acidified. Field No.: repl., field replicate. Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; μm, micrometer; mg/L, milligram per liter; <, less than; –, not applicable] Map No. Laboratory No. Field No. Filter and treatment Latitude (°N) Longitude (°W) Date collected Ag Al As Ba Be Bi Ca Cd 0.45 μm filter, acidifed MH1 C-285486 06AK01-.45FA 0.45FA 63.32227 -146.04453 06-21-06 < 3 13 1 36.2 < 0.05 0.3 30.4 < 0.02 MH2 C-285487 06AK02-.45FA 0.45FA 63.30497 -146.01581 06-21-06 < 3 < 2 < 1 < .2 < .05 < .2 5.73 < .02 MH3 C-285488 06AK03-.45FA 0.45FA 63.30404 -146.04607 06-21-06 < 3 < 2 < 1 .28 < .05 < .2 10.5 < .02 MH4 C-285489 06AK04-.45FA 0.45FA 63.30370 -146.04990 06-21-06 < 3 28.2 1 5.81 < .05 < .2 17.9 .08 MH5 C-285490 06AK05-.45FA 0.45FA 63.30473 -146.05590 06-21-06 < 3 58.9 3 9.13 < .05 < .2 21.6 .1 MH6 C-285491 06AK06-.45FA 0.45FA 63.29038 -146.04857 06-21-06 < 3 30.2 1 7.7 < .05 < .2 18.2 .06 MH7 C-285492 06AK07-.45FA 0.45FA 63.24325 -146.06044 06-22-06 < 3 < 2 78.1 .96 < .05 < .2 7.22 < .02 C-285493 06AK07-.45FA repl. 0.45FA 63.24325 -146.06044 06-22-06 < 3 < 2 79.4 .9 < .05 < .2 7.23 < .02 MH8 C-285494 06AK08-.45FA 0.45FA 63.24343 -146.06023 06-22-06 < 3 < 2 76.8 1.33 < .05 .29 7.58 < .02 MH9 C-285495 06AK09-.45FA 0.45FA 63.23375 -146.07518 06-22-06 < 3 22.1 < 1 1.74 < .05 < .2 1.31 < .02 MH10 C-285496 06AK10-.45FA 0.45FA 63.23109 -146.02482 06-22-06 < 3 10.7 < 1 1.92 < .05 < .2 1.66 < .02 MH11 C-285497 06AK11-.45FA 0.45FA 63.25372 -146.17209 06-22-06 < 3 20.3 < 1 1.52 < .05 < .2 1.37 < .02 MH12 C-285498 06AK12-.45FA 0.45FA 63.26160 -146.19040 06-22-06 < 3 11.6 < 1 2.23 < .05 < .2 1.58 < .02 MH13 C-285499 06AK13-.45FA 0.45FA 63.21561 -145.96478 06-23-06 < 3 3.8 < 1 1.36 < .05 < .2 .88 < .02 MH14 C-285500 06AK14-.45FA 0.45FA 63.06788 -145.77942 06-23-06 < 3 161 < 1 4.74 < .05 < .2 2.08 < .02 MH15 C-285503 06AK15-.45FA 0.45FA 63.20863 -145.94130 06-24-06 < 3 12.4 < 1 1.88 < .05 < .2 1.57 < .02 MH16 C-285504 06AK16-.45FA 0.45FA 63.23763 -146.12909 06-24-06 < 3 25.7 < 1 1.68 < .05 < .2 1.27 < .02 MH17 C-285505 06AK17-.45FA 0.45FA 63.27634 -146.27193 06-25-06 < 3 6.6 < 1 3.89 < .05 < .2 2.91 < .02 MH18 C-285506 06AK18-.45FA 0.45FA 63.28515 -146.32445 06-25-06 < 3 26.9 < 1 8.11 < .05 < .2 2.23 < .02 MH19 C-285507 06AK19-.45FA 0.45FA 63.31868 -146.32762 06-25-06 < 3 5 26.1 9.69 < .05 < .2 8.04 < .02 MH20 C-285508 06AK20-.45FA 0.45FA 63.22520 -145.93295 06-25-06 < 3 3.3 2 4.39 < .05 < .2 2.9 < .02 C-285509 06AK20-.45FA repl. 0.45FA 63.22520 -145.93295 06-25-06 < 3 3.5 2 4.5 < .05 < .2 2.92 < .02 MH21 C-285510 06AK06LG-.45FA 0.45FA 63.07365 -145.74760 06-20-06 < 3 10.3 < 1 2.41 < .05 < .2 1.21 < .02 MH22 C-285511 06AK07LG-.45FA 0.45FA 63.09626 -145.75070 06-20-06 < 3 4.3 < 1 5.3 < .05 < .2 4.51 < .02 MH23 C-285512 06AK08LG-.45FA 0.45FA 63.22570 -146.05507 06-22-06 < 3 3.5 < 1 2.34 < .05 < .2 1.49 < .02 MH24 C-285513 06AK09LG-.45FA 0.45FA 63.22648 -146.18576 06-22-06 < 3 4.7 < 1 2.24 < .05 < .2 1.26 < .02 MH25 C-285514 06AK10LG-.45FA 0.45FA 63.05607 -145.87636 06-23-06 < 3 24.6 < 1 11 < .05 < .2 13.4 < .02 MH26 C-285515 06AK11LG-.45FA 0.45FA 63.22106 -145.91483 06-24-06 < 3 14 2 2.88 < .05 < .2 1.8 < .02 MH27 C-285516 06AK12LG-.45FA 0.45FA 63.27527 -146.27946 06-25-06 < 3 7.5 < 1 4.83 < .05 < .2 2.24 < .02 MH28 C-285517 06AK13LG-.45FA 0.45FA 63.27890 -146.31895 06-25-06 < 3 9.7 1 6.04 < .05 < .2 3.37 < .02 MH29 C-285518 06AK14LG-.45FA 0.45FA 63.33512 -146.33614 06-25-06 < 3 2 < 1 32.2 < .05 < .2 19 < .02 MH30 C-285519 06AK15LG-.45FA 0.45FA 63.29633 -146.30942 06-25-06 < 3 2.1 < 1 10.8 < .05 < .2 6.67 < .02 C-285501 Blank-ocala.45FA 0.45FA – – 06-24-10 < 3 < 2 < 1 < .2 < .05 < .2 < .2 < .02 C-285502 Blank-rich-.45FA 0.45FA – – 06-24-10 < 3 < 2 < 1 < .2 < .05 .32 < .2 < .02
24 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska Table 5. Map, laboratory, and field numbers, sample treatment, site latitude and longitude, and cation and trace-element chemistry of filtered (FA) and unfiltered (RA) acidified surface-water samples, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. Surface-water cation and trace-element chemistry determined using inductively coupled plasma-mass spectrometry (ICP-MS). Filter and treatment: 0.1FA, passed through 0.1-μm filter, acidified; 0.45FA, passed through 0.45-μm filter, acidified. Field No.: repl., field replicate. Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; μm, micrometer; mg/L, milligram per liter; <, less than; –, not applicable] Map No. Laboratory No. Field No. Filter and treatment Latitude (°N) Longitude (°W) Date collected Ce Co Cr Cs Cu Dy Er Eu 0.45 μm filter, acidifed MH1 C-285486 06AK01-.45FA 0.45FA 63.32227 -146.04453 06-21-06 < 0.01 <0.02 <1 < 0.02 0.54 < 0.005 < 0.005 0.005 MH2 C-285487 06AK02-.45FA 0.45FA 63.30497 -146.01581 06-21-06 < .01 <.02 <1 < .02 <.5 < .005 < .005 < .005 MH3 C-285488 06AK03-.45FA 0.45FA 63.30404 -146.04607 06-21-06 < .01 <.02 <1 < .02 <.5 < .005 < .005 < .005 MH4 C-285489 06AK04-.45FA 0.45FA 63.30370 -146.04990 06-21-06 .16 1.74 <1 < .02 16.6 .091 .056 .01 MH5 C-285490 06AK05-.45FA 0.45FA 63.30473 -146.05590 06-21-06 .34 2.24 <1 < .02 26.9 .23 .15 .04 MH6 C-285491 06AK06-.45FA 0.45FA 63.29038 -146.04857 06-21-06 .11 1.22 <1 < .02 10 .076 .05 .01 MH7 C-285492 06AK07-.45FA 0.45FA 63.24325 -146.06044 06-22-06 < .01 <.02 2.4 1.19 .5 < .005 < .005 < .005 C-285493 06AK07-.45FA repl. 0.45FA 63.24325 -146.06044 06-22-06 < .01 <.02 2.4 1.18 .51 < .005 < .005 < .005 MH8 C-285494 06AK08-.45FA 0.45FA 63.24343 -146.06023 06-22-06 < .01 <.02 2 1.29 .6 < .005 < .005 < .005 MH9 C-285495 06AK09-.45FA 0.45FA 63.23375 -146.07518 06-22-06 .03 .06 <1 .07 1.6 .009 < .005 < .005 MH10 C-285496 06AK10-.45FA 0.45FA 63.23109 -146.02482 06-22-06 .01 .03 <1 .36 2 .006 < .005 < .005 MH11 C-285497 06AK11-.45FA 0.45FA 63.25372 -146.17209 06-22-06 .03 .02 <1 < .02 1.3 .008 < .005 < .005 MH12 C-285498 06AK12-.45FA 0.45FA 63.26160 -146.19040 06-22-06 .02 .02 <1 < .02 1.2 < .005 < .005 < .005 MH13 C-285499 06AK13-.45FA 0.45FA 63.21561 -145.96478 06-23-06 < .01 <.02 <1 < .02 .98 < .005 < .005 < .005 MH14 C-285500 06AK14-.45FA 0.45FA 63.06788 -145.77942 06-23-06 .15 .07 <1 < .02 4.5 .02 .01 .005 MH15 C-285503 06AK15-.45FA 0.45FA 63.20863 -145.94130 06-24-06 .02 .04 <1 < .02 1.7 < .005 < .005 < .005 MH16 C-285504 06AK16-.45FA 0.45FA 63.23763 -146.12909 06-24-06 .04 .02 <1 < .02 .99 .01 .005 < .005 MH17 C-285505 06AK17-.45FA 0.45FA 63.27634 -146.27193 06-25-06 < .01 .07 <1 < .02 1.5 < .005 < .005 < .005 MH18 C-285506 06AK18-.45FA 0.45FA 63.28515 -146.32445 06-25-06 .05 .02 <1 .08 1.1 .01 .008 < .005 MH19 C-285507 06AK19-.45FA 0.45FA 63.31868 -146.32762 06-25-06 < .01 .08 1.1 .08 .54 < .005 < .005 < .005 MH20 C-285508 06AK20-.45FA 0.45FA 63.22520 -145.93295 06-25-06 < .01 .04 <1 < .02 2.1 < .005 < .005 < .005 C-285509 06AK20-.45FA repl. 0.45FA 63.22520 -145.93295 06-25-06 < .01 .04 <1 < .02 2.1 < .005 < .005 < .005 MH21 C-285510 06AK06LG-.45FA 0.45FA 63.07365 -145.74760 06-20-06 .01 .04 <1 < .02 .76 < .005 < .005 < .005 MH22 C-285511 06AK07LG-.45FA 0.45FA 63.09626 -145.75070 06-20-06 < .01 .04 <1 < .02 .73 < .005 < .005 < .005 MH23 C-285512 06AK08LG-.45FA 0.45FA 63.22570 -146.05507 06-22-06 < .01 .04 <1 < .02 1.4 < .005 < .005 < .005 MH24 C-285513 06AK09LG-.45FA 0.45FA 63.22648 -146.18576 06-22-06 < .01 <.02 <1 < .02 <.5 < .005 < .005 < .005 MH25 C-285514 06AK10LG-.45FA 0.45FA 63.05607 -145.87636 06-23-06 .04 .02 <1 < .02 1.7 .009 .006 .005 MH26 C-285515 06AK11LG-.45FA 0.45FA 63.22106 -145.91483 06-24-06 .02 .04 <1 < .02 1.8 .005 < .005 < .005 MH27 C-285516 06AK12LG-.45FA 0.45FA 63.27527 -146.27946 06-25-06 .01 .05 <1 < .02 1.3 < .005 < .005 < .005 MH28 C-285517 06AK13LG-.45FA 0.45FA 63.27890 -146.31895 06-25-06 .02 .2 <1 .02 1.1 < .005 < .005 < .005 MH29 C-285518 06AK14LG-.45FA 0.45FA 63.33512 -146.33614 06-25-06 < .01 <.02 <1 < .02 <.5 < .005 < .005 < .005 MH30 C-285519 06AK15LG-.45FA 0.45FA 63.29633 -146.30942 06-25-06 < .01 <.02 <1 < .02 .6 < .005 < .005 < .005 C-285501 Blank-ocala.45FA 0.45FA – – 06-24-10 < .01 <.02 <1 < .02 <.5 < .005 < .005 < .005 C-285502 Blank-rich-.45FA 0.45FA – – 06-24-10 < .01 <.02 <1 < .02 <.5 < .005 < .005 < .005
Table 5 25 Table 5. Map, laboratory, and field numbers, sample treatment, site latitude and longitude, and cation and trace-element chemistry of filtered (FA) and unfiltered (RA) acidified surface-water samples, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. Surface-water cation and trace-element chemistry determined using inductively coupled plasma-mass spectrometry (ICP-MS). Filter and treatment: 0.1FA, passed through 0.1-μm filter, acidified; 0.45FA, passed through 0.45-μm filter, acidified. Field No.: repl., field replicate. Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; μm, micrometer; mg/L, milligram per liter; <, less than; –, not applicable] Map No. Laboratory No. Field No. Filter and treatment Latitude (°N) Longitude (°W) Date collected Fe Ga Gd Ge Ho K La Li 0.45 μm filter, acidifed MH1 C-285486 06AK01-.45FA 0.45FA 63.32227 -146.04453 06-21-06 <50 < 0.05 < 0.005 < 0.05 < 0.005 0.63 0.01 2.2 MH2 C-285487 06AK02-.45FA 0.45FA 63.30497 -146.01581 06-21-06 <50 < .05 < .005 < .05 < .005 .07 < .01 < .1 MH3 C-285488 06AK03-.45FA 0.45FA 63.30404 -146.04607 06-21-06 <50 < .05 < .005 < .05 < .005 .1 < .01 < .1 MH4 C-285489 06AK04-.45FA 0.45FA 63.30370 -146.04990 06-21-06 <50 < .05 .084 < .05 .02 .2 .19 < .1 MH5 C-285490 06AK05-.45FA 0.45FA 63.30473 -146.05590 06-21-06 <50 < .05 .21 < .05 .05 .2 .36 < .1 MH6 C-285491 06AK06-.45FA 0.45FA 63.29038 -146.04857 06-21-06 <50 < .05 .065 < .05 .02 .2 .11 < .1 MH7 C-285492 06AK07-.45FA 0.45FA 63.24325 -146.06044 06-22-06 <50 < .05 < .005 < .05 < .005 .69 < .01 10.4 C-285493 06AK07-.45FA repl. 0.45FA 63.24325 -146.06044 06-22-06 <50 < .05 < .005 < .05 < .005 .69 < .01 10.5 MH8 C-285494 06AK08-.45FA 0.45FA 63.24343 -146.06023 06-22-06 <50 < .05 < .005 < .05 < .005 .71 < .01 9.8 MH9 C-285495 06AK09-.45FA 0.45FA 63.23375 -146.07518 06-22-06 <50 < .05 .008 < .05 < .005 .1 .02 .4 MH10 C-285496 06AK10-.45FA 0.45FA 63.23109 -146.02482 06-22-06 <50 < .05 < .005 < .05 < .005 .1 .01 .8 MH11 C-285497 06AK11-.45FA 0.45FA 63.25372 -146.17209 06-22-06 <50 < .05 .01 < .05 < .005 .06 .02 < .1 MH12 C-285498 06AK12-.45FA 0.45FA 63.26160 -146.19040 06-22-06 <50 < .05 .005 < .05 < .005 .1 .01 < .1 MH13 C-285499 06AK13-.45FA 0.45FA 63.21561 -145.96478 06-23-06 <50 < .05 < .005 < .05 < .005 .1 < .01 < .1 MH14 C-285500 06AK14-.45FA 0.45FA 63.06788 -145.77942 06-23-06 58 < .05 .03 < .05 .005 .41 .08 < .1 MH15 C-285503 06AK15-.45FA 0.45FA 63.20863 -145.94130 06-24-06 <50 < .05 .006 < .05 < .005 .08 .01 < .1 MH16 C-285504 06AK16-.45FA 0.45FA 63.23763 -146.12909 06-24-06 <50 < .05 .008 < .05 < .005 .07 .03 < .1 MH17 C-285505 06AK17-.45FA 0.45FA 63.27634 -146.27193 06-25-06 94 < .05 .005 < .05 < .005 .04 < .01 < .1 MH18 C-285506 06AK18-.45FA 0.45FA 63.28515 -146.32445 06-25-06 <50 < .05 .01 < .05 < .005 .2 .05 < .1 MH19 C-285507 06AK19-.45FA 0.45FA 63.31868 -146.32762 06-25-06 <50 < .05 < .005 .05 < .005 .46 < .01 .5 MH20 C-285508 06AK20-.45FA 0.45FA 63.22520 -145.93295 06-25-06 <50 < .05 < .005 < .05 < .005 .3 < .01 .4 C-285509 06AK20-.45FA repl. 0.45FA 63.22520 -145.93295 06-25-06 <50 < .05 .007 < .05 < .005 .3 < .01 < .1 MH21 C-285510 06AK06LG-.45FA 0.45FA 63.07365 -145.74760 06-20-06 91 < .05 < .005 < .05 < .005 .06 < .01 < .1 MH22 C-285511 06AK07LG-.45FA 0.45FA 63.09626 -145.75070 06-20-06 89 < .05 < .005 < .05 < .005 .1 < .01 < .1 MH23 C-285512 06AK08LG-.45FA 0.45FA 63.22570 -146.05507 06-22-06 <50 < .05 < .005 < .05 < .005 .1 < .01 .6 MH24 C-285513 06AK09LG-.45FA 0.45FA 63.22648 -146.18576 06-22-06 <50 < .05 < .005 < .05 < .005 .07 < .01 .4 MH25 C-285514 06AK10LG-.45FA 0.45FA 63.05607 -145.87636 06-23-06 <50 < .05 .01 < .05 < .005 .52 .03 .4 MH26 C-285515 06AK11LG-.45FA 0.45FA 63.22106 -145.91483 06-24-06 <50 < .05 .005 < .05 < .005 .2 .02 3.5 MH27 C-285516 06AK12LG-.45FA 0.45FA 63.27527 -146.27946 06-25-06 80 < .05 < .005 < .05 < .005 .09 .01 .9 MH28 C-285517 06AK13LG-.45FA 0.45FA 63.27890 -146.31895 06-25-06 138 < .05 < .005 < .05 < .005 .2 .01 1.3 MH29 C-285518 06AK14LG-.45FA 0.45FA 63.33512 -146.33614 06-25-06 <50 < .05 < .005 < .05 < .005 .3 < .01 .4 MH30 C-285519 06AK15LG-.45FA 0.45FA 63.29633 -146.30942 06-25-06 <50 < .05 < .005 < .05 < .005 .56 .02 .7 C-285501 Blank-ocala.45FA 0.45FA – – 06-24-10 <50 < .05 < .005 < .05 < .005 <.03 < .01 < .1 C-285502 Blank-rich-.45FA 0.45FA – – 06-24-10 <50 < .05 < .005 < .05 < .005 <.03 < .01 < .1
26 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska Table 5. Map, laboratory, and field numbers, sample treatment, site latitude and longitude, and cation and trace-element chemistry of filtered (FA) and unfiltered (RA) acidified surface-water samples, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. Surface-water cation and trace-element chemistry determined using inductively coupled plasma-mass spectrometry (ICP-MS). Filter and treatment: 0.1FA, passed through 0.1-μm filter, acidified; 0.45FA, passed through 0.45-μm filter, acidified. Field No.: repl., field replicate. Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; μm, micrometer; mg/L, milligram per liter; <, less than; –, not applicable] Map No. Laboratory No. Field No. Filter and treatment Latitude (°N) Longitude (°W) Date collected Lu Mg Mn Mo Na Nb Nd Ni 0.45 μm filter, acidifed MH1 C-285486 06AK01-.45FA 0.45FA 63.32227 -146.04453 06-21-06 < 0.1 10.7 <0.2 < 2 10.4 0.87 < 0.01 <0.4 MH2 C-285487 06AK02-.45FA 0.45FA 63.30497 -146.01581 06-21-06 < .1 .86 <.2 < 2 .98 .28 < .01 <.4 MH3 C-285488 06AK03-.45FA 0.45FA 63.30404 -146.04607 06-21-06 < .1 2.24 1.6 < 2 1.63 < .2 < .01 2.4 MH4 C-285489 06AK04-.45FA 0.45FA 63.30370 -146.04990 06-21-06 < .1 5.42 27.9 < 2 2.06 < .2 .21 8.1 MH5 C-285490 06AK05-.45FA 0.45FA 63.30473 -146.05590 06-21-06 < .1 7.03 36.7 < 2 2.35 < .2 .45 10.1 MH6 C-285491 06AK06-.45FA 0.45FA 63.29038 -146.04857 06-21-06 < .1 5.38 20.4 < 2 2.14 < .2 .15 7.2 MH7 C-285492 06AK07-.45FA 0.45FA 63.24325 -146.06044 06-22-06 < .1 20.9 <.2 < 2 .73 < .2 < .01 1.3 C-285493 06AK07-.45FA repl. 0.45FA 63.24325 -146.06044 06-22-06 < .1 21.2 <.2 < 2 .73 < .2 < .01 1.3 MH8 C-285494 06AK08-.45FA 0.45FA 63.24343 -146.06023 06-22-06 < .1 22.2 <.2 < 2 .89 .74 < .01 1.6 MH9 C-285495 06AK09-.45FA 0.45FA 63.23375 -146.07518 06-22-06 < .1 3.25 2.9 < 2 .41 .3 .03 4.8 MH10 C-285496 06AK10-.45FA 0.45FA 63.23109 -146.02482 06-22-06 < .1 5.66 <.2 < 2 .48 < .2 .02 7.7 MH11 C-285497 06AK11-.45FA 0.45FA 63.25372 -146.17209 06-22-06 < .1 4.32 .2 < 2 .3 < .2 .03 4.2 MH12 C-285498 06AK12-.45FA 0.45FA 63.26160 -146.19040 06-22-06 < .1 6.34 <.2 < 2 .3 < .2 .02 4.4 MH13 C-285499 06AK13-.45FA 0.45FA 63.21561 -145.96478 06-23-06 < .1 11.8 <.2 < 2 .24 < .2 < .01 4 MH14 C-285500 06AK14-.45FA 0.45FA 63.06788 -145.77942 06-23-06 < .1 3.51 .9 < 2 .3 < .2 .11 8.6 MH15 C-285503 06AK15-.45FA 0.45FA 63.20863 -145.94130 06-24-06 < .1 10.8 <.2 < 2 .39 .36 .02 6.7 MH16 C-285504 06AK16-.45FA 0.45FA 63.23763 -146.12909 06-24-06 < .1 1.92 .3 < 2 .34 < .2 .04 1.3 MH17 C-285505 06AK17-.45FA 0.45FA 63.27634 -146.27193 06-25-06 < .1 4.19 3.2 < 2 .47 < .2 .02 8.8 MH18 C-285506 06AK18-.45FA 0.45FA 63.28515 -146.32445 06-25-06 < .1 1.25 <.2 < 2 .6 < .2 .07 2.7 MH19 C-285507 06AK19-.45FA 0.45FA 63.31868 -146.32762 06-25-06 < .1 3.23 1.5 < 2 1.34 < .2 < .01 .5 MH20 C-285508 06AK20-.45FA 0.45FA 63.22520 -145.93295 06-25-06 < .1 12.6 <.2 < 2 .32 < .2 .01 8 C-285509 06AK20-.45FA repl. 0.45FA 63.22520 -145.93295 06-25-06 < .1 12.7 <.2 < 2 .32 < .2 .01 8.2 MH21 C-285510 06AK06LG-.45FA 0.45FA 63.07365 -145.74760 06-20-06 < .1 5.38 .6 < 2 .38 < .2 .01 4.5 MH22 C-285511 06AK07LG-.45FA 0.45FA 63.09626 -145.75070 06-20-06 < .1 10.2 2.9 < 2 1.14 < .2 < .01 4.1 MH23 C-285512 06AK08LG-.45FA 0.45FA 63.22570 -146.05507 06-22-06 < .1 10.7 1.6 < 2 .27 < .2 < .01 7.4 MH24 C-285513 06AK09LG-.45FA 0.45FA 63.22648 -146.18576 06-22-06 < .1 .23 .2 < 2 .35 < .2 .01 <.4 MH25 C-285514 06AK10LG-.45FA 0.45FA 63.05607 -145.87636 06-23-06 < .1 7.25 .7 < 2 1.19 < .2 .04 1.5 MH26 C-285515 06AK11LG-.45FA 0.45FA 63.22106 -145.91483 06-24-06 < .1 16.2 <.2 < 2 .91 < .2 .02 2.8 MH27 C-285516 06AK12LG-.45FA 0.45FA 63.27527 -146.27946 06-25-06 < .1 5.73 1.9 < 2 .76 < .2 .02 8.1 MH28 C-285517 06AK13LG-.45FA 0.45FA 63.27890 -146.31895 06-25-06 < .1 3.52 13.4 < 2 1.06 < .2 .01 5.6 MH29 C-285518 06AK14LG-.45FA 0.45FA 63.33512 -146.33614 06-25-06 < .1 4.5 .4 < 2 .99 < .2 < .01 <.4 MH30 C-285519 06AK15LG-.45FA 0.45FA 63.29633 -146.30942 06-25-06 < .1 1.21 <.2 < 2 1.09 < .2 .01 <.4 C-285501 Blank-ocala.45FA 0.45FA – – 06-24-10 < .1 <.01 <.2 < 2 <.01 < .2 < .01 <.4 C-285502 Blank-rich-.45FA 0.45FA – – 06-24-10 < .1 <.01 <.2 < 2 <.01 .67 < .01 <.4
Table 5 27 Table 5. Map, laboratory, and field numbers, sample treatment, site latitude and longitude, and cation and trace-element chemistry of filtered (FA) and unfiltered (RA) acidified surface-water samples, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. Surface-water cation and trace-element chemistry determined using inductively coupled plasma-mass spectrometry (ICP-MS). Filter and treatment: 0.1FA, passed through 0.1-μm filter, acidified; 0.45FA, passed through 0.45-μm filter, acidified. Field No.: repl., field replicate. Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; μm, micrometer; mg/L, milligram per liter; <, less than; –, not applicable] Map No. Laboratory No. Field No. Filter and treatment Latitude (°N) Longitude (°W) Date collected P Pb Pr Rb Sb Sc Se SiO2 0.45 μm filter, acidifed MH1 C-285486 06AK01-.45FA 0.45FA 63.32227 -146.04453 06-21-06 < 0.01 <0.05 < 0.01 0.31 1.75 < 0.6 1.4 3.5 MH2 C-285487 06AK02-.45FA 0.45FA 63.30497 -146.01581 06-21-06 < .01 <.05 < .01 .07 .55 < .6 < 1 5.5 MH3 C-285488 06AK03-.45FA 0.45FA 63.30404 -146.04607 06-21-06 < .01 <.05 < .01 .13 .33 < .6 < 1 5.6 MH4 C-285489 06AK04-.45FA 0.45FA 63.30370 -146.04990 06-21-06 < .01 <.05 .04 .26 .42 .6 < 1 5.8 MH5 C-285490 06AK05-.45FA 0.45FA 63.30473 -146.05590 06-21-06 < .01 <.05 .09 .33 .54 .6 1 6.1 MH6 C-285491 06AK06-.45FA 0.45FA 63.29038 -146.04857 06-21-06 < .01 <.05 .03 .26 .39 < .6 < 1 6 MH7 C-285492 06AK07-.45FA 0.45FA 63.24325 -146.06044 06-22-06 < .01 <.05 < .01 3.05 2.56 2.1 < 1 23 C-285493 06AK07-.45FA repl. 0.45FA 63.24325 -146.06044 06-22-06 < .01 <.05 < .01 3.03 2.56 2 < 1 23.3 MH8 C-285494 06AK08-.45FA 0.45FA 63.24343 -146.06023 06-22-06 < .01 <.05 < .01 3.11 3.34 2.1 < 1 22.9 MH9 C-285495 06AK09-.45FA 0.45FA 63.23375 -146.07518 06-22-06 < .01 <.05 < .01 .27 .48 .6 < 1 6.6 MH10 C-285496 06AK10-.45FA 0.45FA 63.23109 -146.02482 06-22-06 < .01 <.05 < .01 .53 .32 .8 < 1 9.9 MH11 C-285497 06AK11-.45FA 0.45FA 63.25372 -146.17209 06-22-06 < .01 <.05 < .01 .1 <.3 .6 < 1 7.2 MH12 C-285498 06AK12-.45FA 0.45FA 63.26160 -146.19040 06-22-06 < .01 <.05 < .01 .16 <.3 .8 < 1 8.9 MH13 C-285499 06AK13-.45FA 0.45FA 63.21561 -145.96478 06-23-06 < .01 <.05 < .01 .22 <.3 < .6 < 1 6.1 MH14 C-285500 06AK14-.45FA 0.45FA 63.06788 -145.77942 06-23-06 < .01 <.05 .03 .64 <.3 .8 < 1 9.6 MH15 C-285503 06AK15-.45FA 0.45FA 63.20863 -145.94130 06-24-06 < .01 <.05 < .01 .15 .5 .9 < 1 9.8 MH16 C-285504 06AK16-.45FA 0.45FA 63.23763 -146.12909 06-24-06 < .01 <.05 < .01 .12 <.3 < .6 < 1 6.5 MH17 C-285505 06AK17-.45FA 0.45FA 63.27634 -146.27193 06-25-06 < .01 <.05 < .01 .1 <.3 .8 < 1 10 MH18 C-285506 06AK18-.45FA 0.45FA 63.28515 -146.32445 06-25-06 < .01 <.05 .02 .25 <.3 < .6 < 1 6.5 MH19 C-285507 06AK19-.45FA 0.45FA 63.31868 -146.32762 06-25-06 .01 <.05 < .01 1.75 .3 < .6 < 1 6.7 MH20 C-285508 06AK20-.45FA 0.45FA 63.22520 -145.93295 06-25-06 < .01 <.05 < .01 .65 <.3 .7 < 1 8.9 C-285509 06AK20-.45FA repl. 0.45FA 63.22520 -145.93295 06-25-06 < .01 11.4 < .01 .65 <.3 .7 < 1 8.8 MH21 C-285510 06AK06LG-.45FA 0.45FA 63.07365 -145.74760 06-20-06 < .01 <.05 < .01 .12 <.3 < .6 < 1 1.1 MH22 C-285511 06AK07LG-.45FA 0.45FA 63.09626 -145.75070 06-20-06 < .01 <.05 < .01 .13 <.3 .6 < 1 6.8 MH23 C-285512 06AK08LG-.45FA 0.45FA 63.22570 -146.05507 06-22-06 < .01 <.05 < .01 .27 .57 1.2 < 1 13.2 MH24 C-285513 06AK09LG-.45FA 0.45FA 63.22648 -146.18576 06-22-06 < .01 <.05 < .01 .09 <.3 < .6 < 1 3.1 MH25 C-285514 06AK10LG-.45FA 0.45FA 63.05607 -145.87636 06-23-06 < .01 <.05 < .01 .36 <.3 1 < 1 10.6 MH26 C-285515 06AK11LG-.45FA 0.45FA 63.22106 -145.91483 06-24-06 < .01 <.05 < .01 .29 <.3 < .6 < 1 5.6 MH27 C-285516 06AK12LG-.45FA 0.45FA 63.27527 -146.27946 06-25-06 < .01 <.05 < .01 .14 <.3 .9 < 1 9.1 MH28 C-285517 06AK13LG-.45FA 0.45FA 63.27890 -146.31895 06-25-06 < .01 <.05 < .01 .24 <.3 .6 < 1 7.1 MH29 C-285518 06AK14LG-.45FA 0.45FA 63.33512 -146.33614 06-25-06 < .01 <.05 < .01 .25 <.3 < .6 < 1 2.4 MH30 C-285519 06AK15LG-.45FA 0.45FA 63.29633 -146.30942 06-25-06 < .01 <.05 < .01 1.02 <.3 .6 < 1 6.5 C-285501 Blank-ocala.45FA 0.45FA – – 06-24-10 < .01 <.05 < .01 < .01 <.3 < .6 < 1 < .2 C-285502 Blank-rich-.45FA 0.45FA – – 06-24-10 < .01 <.05 < .01 < .01 1.12 < .6 < 1 < .2
28 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska Table 5. Map, laboratory, and field numbers, sample treatment, site latitude and longitude, and cation and trace-element chemistry of filtered (FA) and unfiltered (RA) acidified surface-water samples, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. Surface-water cation and trace-element chemistry determined using inductively coupled plasma-mass spectrometry (ICP-MS). Filter and treatment: 0.1FA, passed through 0.1-μm filter, acidified; 0.45FA, passed through 0.45-μm filter, acidified. Field No.: repl., field replicate. Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; μm, micrometer; mg/L, milligram per liter; <, less than; –, not applicable] Map No. Laboratory No. Field No. Filter and treatment Latitude (°N) Longitude (°W) Date collected Sm SO4 Sr Ta Tb Th Ti Tl 0.45 μm filter, acidifed MH1 C-285486 06AK01-.45FA 0.45FA 63.32227 -146.04453 06-21-06 < 0.01 46 166 0.08 < 0.005 < 0.2 0.7 <0.1 MH2 C-285487 06AK02-.45FA 0.45FA 63.30497 -146.01581 06-21-06 < .01 8 2.77 .03 < .005 < .2 < .5 <.1 MH3 C-285488 06AK03-.45FA 0.45FA 63.30404 -146.04607 06-21-06 < .01 23 5.89 .02 < .005 < .2 < .5 <.1 MH4 C-285489 06AK04-.45FA 0.45FA 63.30370 -146.04990 06-21-06 .05 40 55.3 < .02 .01 < .2 .5 <.1 MH5 C-285490 06AK05-.45FA 0.45FA 63.30473 -146.05590 06-21-06 .12 46 81 < .02 .03 < .2 .6 <.1 MH6 C-285491 06AK06-.45FA 0.45FA 63.29038 -146.04857 06-21-06 .04 40 60.2 < .02 .01 < .2 < .5 <.1 MH7 C-285492 06AK07-.45FA 0.45FA 63.24325 -146.06044 06-22-06 < .01 7 36.3 < .02 < .005 < .2 < .5 <.1 C-285493 06AK07-.45FA repl. 0.45FA 63.24325 -146.06044 06-22-06 < .01 7 36.6 < .02 < .005 < .2 < .5 <.1 MH8 C-285494 06AK08-.45FA 0.45FA 63.24343 -146.06023 06-22-06 < .01 8 37.3 .06 < .005 < .2 < .5 <.1 MH9 C-285495 06AK09-.45FA 0.45FA 63.23375 -146.07518 06-22-06 < .01 < 2 5.52 .03 < .005 < .2 .5 <.1 MH10 C-285496 06AK10-.45FA 0.45FA 63.23109 -146.02482 06-22-06 < .01 < 2 6.64 < .02 < .005 < .2 < .5 <.1 MH11 C-285497 06AK11-.45FA 0.45FA 63.25372 -146.17209 06-22-06 < .01 < 2 5.38 < .02 < .005 < .2 < .5 <.1 MH12 C-285498 06AK12-.45FA 0.45FA 63.26160 -146.19040 06-22-06 < .01 < 2 5.96 < .02 < .005 < .2 < .5 <.1 MH13 C-285499 06AK13-.45FA 0.45FA 63.21561 -145.96478 06-23-06 < .01 3 4.7 < .02 < .005 < .2 < .5 <.1 MH14 C-285500 06AK14-.45FA 0.45FA 63.06788 -145.77942 06-23-06 .02 < 2 9.04 < .02 < .005 < .2 1.4 <.1 MH15 C-285503 06AK15-.45FA 0.45FA 63.20863 -145.94130 06-24-06 < .01 4 7.13 .03 < .005 < .2 < .5 <.1 MH16 C-285504 06AK16-.45FA 0.45FA 63.23763 -146.12909 06-24-06 .01 < 2 6.35 < .02 < .005 < .2 < .5 <.1 MH17 C-285505 06AK17-.45FA 0.45FA 63.27634 -146.27193 06-25-06 < .01 < 2 9.54 < .02 < .005 < .2 < .5 <.1 MH18 C-285506 06AK18-.45FA 0.45FA 63.28515 -146.32445 06-25-06 .01 < 2 12.1 < .02 < .005 < .2 < .5 <.1 MH19 C-285507 06AK19-.45FA 0.45FA 63.31868 -146.32762 06-25-06 < .01 7 47.8 < .02 < .005 < .2 < .5 <.1 MH20 C-285508 06AK20-.45FA 0.45FA 63.22520 -145.93295 06-25-06 < .01 6 11.3 < .02 < .005 < .2 < .5 <.1 C-285509 06AK20-.45FA repl. 0.45FA 63.22520 -145.93295 06-25-06 < .01 6 11.3 < .02 < .005 < .2 < .5 <.1 MH21 C-285510 06AK06LG-.45FA 0.45FA 63.07365 -145.74760 06-20-06 < .01 < 2 6.9 < .02 < .005 < .2 < .5 <.1 MH22 C-285511 06AK07LG-.45FA 0.45FA 63.09626 -145.75070 06-20-06 < .01 2 17 < .02 < .005 < .2 < .5 <.1 MH23 C-285512 06AK08LG-.45FA 0.45FA 63.22570 -146.05507 06-22-06 < .01 2 7.09 .03 < .005 < .2 < .5 <.1 MH24 C-285513 06AK09LG-.45FA 0.45FA 63.22648 -146.18576 06-22-06 < .01 < 2 4.47 .02 < .005 < .2 < .5 <.1 MH25 C-285514 06AK10LG-.45FA 0.45FA 63.05607 -145.87636 06-23-06 .01 < 2 38.7 .02 < .005 < .2 .7 <.1 MH26 C-285515 06AK11LG-.45FA 0.45FA 63.22106 -145.91483 06-24-06 < .01 11 8 < .02 < .005 < .2 < .5 <.1 MH27 C-285516 06AK12LG-.45FA 0.45FA 63.27527 -146.27946 06-25-06 < .01 < 2 13.7 < .02 < .005 < .2 < .5 <.1 MH28 C-285517 06AK13LG-.45FA 0.45FA 63.27890 -146.31895 06-25-06 < .01 < 2 14.7 < .02 < .005 < .2 < .5 <.1 MH29 C-285518 06AK14LG-.45FA 0.45FA 63.33512 -146.33614 06-25-06 < .01 22 108 < .02 < .005 < .2 < .5 <.1 MH30 C-285519 06AK15LG-.45FA 0.45FA 63.29633 -146.30942 06-25-06 < .01 10 28.4 < .02 < .005 < .2 < .5 <.1 C-285501 Blank-ocala.45FA 0.45FA – – 06-24-10 < .01 < 2 < .5 < .02 < .005 < .2 < .5 <.1 C-285502 Blank-rich-.45FA 0.45FA – – 06-24-10 < .01 < 2 < .5 .05 < .005 < .2 < .5 <.1
Table 5 29 Table 5. Map, laboratory, and field numbers, sample treatment, site latitude and longitude, and cation and trace-element chemistry of filtered (FA) and unfiltered (RA) acidified surface-water samples, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. Surface-water cation and trace-element chemistry determined using inductively coupled plasma-mass spectrometry (ICP-MS). Filter and treatment: 0.1FA, passed through 0.1-μm filter, acidified; 0.45FA, passed through 0.45-μm filter, acidified. Field No.: repl., field replicate. Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; μm, micrometer; mg/L, milligram per liter; <, less than; –, not applicable] Map No. Laboratory No. Field No. Filter and treatment Latitude (°N) Longitude (°W) Date collected Tm U V W Y Yb Zn Zr 0.45 μm filter, acidifed MH1 C-285486 06AK01-.45FA 0.45FA 63.32227 -146.04453 06-21-06 < 0.005 0.42 0.6 1.08 0.02 < 0.005 1.6 < 0.2 MH2 C-285487 06AK02-.45FA 0.45FA 63.30497 -146.01581 06-21-06 < .005 < .1 <.5 < .5 < .01 < .005 1.4 < .2 MH3 C-285488 06AK03-.45FA 0.45FA 63.30404 -146.04607 06-21-06 < .005 < .1 <.5 < .5 < .01 < .005 1.5 < .2 MH4 C-285489 06AK04-.45FA 0.45FA 63.30370 -146.04990 06-21-06 .008 < .1 .5 < .5 .77 .04 5.8 < .2 MH5 C-285490 06AK05-.45FA 0.45FA 63.30473 -146.05590 06-21-06 .02 .12 .5 < .5 1.6 .1 7.9 < .2 MH6 C-285491 06AK06-.45FA 0.45FA 63.29038 -146.04857 06-21-06 .006 < .1 <.5 < .5 .53 .04 4.8 < .2 MH7 C-285492 06AK07-.45FA 0.45FA 63.24325 -146.06044 06-22-06 < .005 < .1 <.5 < .5 < .01 < .005 <.5 < .2 C-285493 06AK07-.45FA repl. 0.45FA 63.24325 -146.06044 06-22-06 < .005 < .1 <.5 < .5 < .01 < .005 <.5 < .2 MH8 C-285494 06AK08-.45FA 0.45FA 63.24343 -146.06023 06-22-06 < .005 .1 <.5 1.04 < .01 < .005 <.5 < .2 MH9 C-285495 06AK09-.45FA 0.45FA 63.23375 -146.07518 06-22-06 < .005 < .1 <.5 < .5 .03 .007 .6 < .2 MH10 C-285496 06AK10-.45FA 0.45FA 63.23109 -146.02482 06-22-06 < .005 < .1 <.5 < .5 .02 < .005 <.5 < .2 MH11 C-285497 06AK11-.45FA 0.45FA 63.25372 -146.17209 06-22-06 < .005 < .1 <.5 < .5 .03 .006 <.5 < .2 MH12 C-285498 06AK12-.45FA 0.45FA 63.26160 -146.19040 06-22-06 < .005 < .1 <.5 < .5 < .01 < .005 <.5 < .2 MH13 C-285499 06AK13-.45FA 0.45FA 63.21561 -145.96478 06-23-06 < .005 < .1 <.5 < .5 < .01 < .005 <.5 < .2 MH14 C-285500 06AK14-.45FA 0.45FA 63.06788 -145.77942 06-23-06 < .005 < .1 <.5 < .5 .11 .02 2 .2 MH15 C-285503 06AK15-.45FA 0.45FA 63.20863 -145.94130 06-24-06 < .005 < .1 <.5 < .5 .01 < .005 .5 < .2 MH16 C-285504 06AK16-.45FA 0.45FA 63.23763 -146.12909 06-24-06 < .005 < .1 <.5 < .5 .04 .006 .5 < .2 MH17 C-285505 06AK17-.45FA 0.45FA 63.27634 -146.27193 06-25-06 < .005 < .1 <.5 < .5 .01 < .005 <.5 < .2 MH18 C-285506 06AK18-.45FA 0.45FA 63.28515 -146.32445 06-25-06 < .005 < .1 <.5 < .5 .07 .009 .6 < .2 MH19 C-285507 06AK19-.45FA 0.45FA 63.31868 -146.32762 06-25-06 < .005 .6 <.5 < .5 < .01 < .005 .8 < .2 MH20 C-285508 06AK20-.45FA 0.45FA 63.22520 -145.93295 06-25-06 < .005 < .1 <.5 < .5 .01 < .005 <.5 < .2 C-285509 06AK20-.45FA repl. 0.45FA 63.22520 -145.93295 06-25-06 < .005 < 0.1 <.5 < .5 .01 < .005 <.5 < .2 MH21 C-285510 06AK06LG-.45FA 0.45FA 63.07365 -145.74760 06-20-06 < .005 < .1 <.5 < .5 < .01 < .005 .8 < .2 MH22 C-285511 06AK07LG-.45FA 0.45FA 63.09626 -145.75070 06-20-06 < .005 < .1 <.5 < .5 < .01 < .005 .7 < .2 MH23 C-285512 06AK08LG-.45FA 0.45FA 63.22570 -146.05507 06-22-06 < .005 < .1 <.5 < .5 < .01 < .005 .7 < .2 MH24 C-285513 06AK09LG-.45FA 0.45FA 63.22648 -146.18576 06-22-06 < .005 < .1 <.5 < .5 < .01 < .005 <.5 < .2 MH25 C-285514 06AK10LG-.45FA 0.45FA 63.05607 -145.87636 06-23-06 < .005 < .1 .7 < .5 .05 .005 .5 < .2 MH26 C-285515 06AK11LG-.45FA 0.45FA 63.22106 -145.91483 06-24-06 < .005 < .1 <.5 < .5 .02 < .005 .5 < .2 MH27 C-285516 06AK12LG-.45FA 0.45FA 63.27527 -146.27946 06-25-06 < .005 < .1 <.5 < .5 .01 < .005 .7 < .2 MH28 C-285517 06AK13LG-.45FA 0.45FA 63.27890 -146.31895 06-25-06 < .005 < .1 <.5 < .5 .01 < .005 <.5 < .2 MH29 C-285518 06AK14LG-.45FA 0.45FA 63.33512 -146.33614 06-25-06 < .005 < .1 <.5 < .5 < .01 < .005 .5 < .2 MH30 C-285519 06AK15LG-.45FA 0.45FA 63.29633 -146.30942 06-25-06 < .005 < .1 <.5 < .5 .02 < .005 .6 < .2 C-285501 Blank-ocala.45FA 0.45FA – – 06-24-10 < .005 < .1 <.5 < .5 < .01 < .005 <.5 < .2 C-285502 Blank-rich-.45FA 0.45FA – – 06-24-10 < .005 < .1 <.5 .92 < .01 < .005 <.5 < .2
30 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska Table 5. Map, laboratory, and field numbers, sample treatment, site latitude and longitude, and cation and trace-element chemistry of filtered (FA) and unfiltered (RA) acidified surface-water samples, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. Surface-water cation and trace-element chemistry determined using inductively coupled plasma-mass spectrometry (ICP-MS). Filter and treatment: 0.1FA, passed through 0.1-μm filter, acidified; 0.45FA, passed through 0.45-μm filter, acidified. Field No.: repl., field replicate. Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; μm, micrometer; mg/L, milligram per liter; <, less than; –, not applicable] Map No. Laboratory No. Field No. Filter and treatment Latitude (°N) Longitude (°W) Date collected Ag Al As Ba Be Bi Ca Cd Unfiltered, acidifed MH1 C-285535 06AK01-RA RA 63.32227 -146.04453 06-21-06 <3 23.3 1 35 <0.05 < 0.2 28.7 <0.02 MH2 C-285536 06AK02-RA RA 63.30497 -146.01581 06-21-06 <3 17.3 <1 <.2 <.05 < .2 5.59 <.02 MH3 C-285537 06AK03-RA RA 63.30404 -146.04607 06-21-06 <3 24.1 <1 .36 <.05 .32 10.3 <.02 MH4 C-285538 06AK04-RA RA 63.30370 -146.04990 06-21-06 <3 127 2 5.99 <.05 < .2 17.9 .07 MH5 C-285539 06AK05-RA RA 63.30473 -146.05590 06-21-06 <3 154 3.6 9.25 <.05 < .2 21.2 .1 MH6 C-285540 06AK06-RA RA 63.29038 -146.04857 06-21-06 <3 105 2 7.91 <.05 < .2 18.4 .06 MH7 C-285541 06AK07-RA RA 63.24325 -146.06044 06-22-06 <3 <2 81 .95 <.05 < .2 7.49 <.02 C-285542 06AK07-RA repl. RA 63.24325 -146.06044 06-22-06 <3 <2 82.4 .96 <.05 < .2 7.52 <.02 MH8 C-285543 06AK08-RA RA 63.24343 -146.06023 06-22-06 <3 5.5 82.2 1.34 <.05 < .2 8.04 <.02 MH9 C-285544 06AK09-RA RA 63.23375 -146.07518 06-22-06 <3 46.6 <1 2.11 <.05 < .2 1.4 <.02 MH10 C-285545 06AK10-RA RA 63.23109 -146.02482 06-22-06 <3 15.9 1 2.03 <.05 .38 1.72 <.02 MH11 C-285546 06AK11-RA RA 63.25372 -146.17209 06-22-06 <3 25.5 <1 1.6 <.05 < .2 1.41 <.02 MH12 C-285547 06AK12-RA RA 63.26160 -146.19040 06-22-06 <3 15.2 <1 2.29 <.05 < .2 1.63 <.02 MH13 C-285548 06AK13-RA RA 63.21561 -145.96478 06-23-06 <3 4.6 <1 1.46 <.05 < .2 .9 <.02 MH14 C-285549 06AK14-RA RA 63.06788 -145.77942 06-23-06 <3 175 <1 4.83 <.05 < .2 2.13 <.02 MH15 C-285552 06AK15-RA RA 63.20863 -145.94130 06-24-06 <3 14.3 <1 1.87 <.05 < .2 1.65 <.02 MH16 C-285553 06AK16-RA RA 63.23763 -146.12909 06-24-06 <3 28.2 <1 1.86 <.05 < .2 1.31 <.02 MH17 C-285554 06AK17-RA RA 63.27634 -146.27193 06-25-06 <3 11.4 <1 4.17 <.05 < .2 3.01 <.02 MH18 C-285555 06AK18-RA RA 63.28515 -146.32445 06-25-06 <3 33.9 1 8.4 <.05 < .2 2.28 <.02 MH19 C-285556 06AK19-RA RA 63.31868 -146.32762 06-25-06 <3 222 29.4 11.8 <.05 < .2 8.29 <.02 MH20 C-285557 06AK20-RA RA 63.22520 -145.93295 06-25-06 <3 10.9 2 4.54 <.05 < .2 3.04 <.02 C-285558 06AK20-RA repl. RA 63.22520 -145.93295 06-25-06 <3 7.8 2 4.53 <.05 < .2 3.13 <.02 MH21 C-285559 06AK06LG-RA RA 63.07365 -145.74760 06-20-06 <3 18.6 <1 2.55 <.05 < .2 1.3 <.02 MH22 C-285560 06AK07LG-RA RA 63.09626 -145.75070 06-20-06 <3 5 <1 5.28 <.05 < .2 4.62 <.02 MH23 C-285561 06AK08LG-RA RA 63.22570 -146.05507 06-22-06 <3 8 <1 2.34 <.05 < .2 1.52 <.02 MH24 C-285562 06AK09LG-RA RA 63.22648 -146.18576 06-22-06 <3 55.1 <1 2.78 <.05 < .2 1.28 <.02 MH25 C-285563 06AK10LG-RA RA 63.05607 -145.87636 06-23-06 <3 94.7 <1 11.2 <.05 < .2 13.1 <.02 MH26 C-285564 06AK11LG-RA RA 63.22106 -145.91483 06-24-06 <3 28.8 2 3.01 <.05 < .2 1.81 <.02 MH27 C-285565 06AK12LG-RA RA 63.27527 -146.27946 06-25-06 <3 15.9 <1 5.12 <.05 < .2 2.38 .07 MH28 C-285566 06AK13LG-RA RA 63.27890 -146.31895 06-25-06 <3 23.9 2 6.45 <.05 .37 3.41 <.02 MH29 C-285567 06AK14LG-RA RA 63.33512 -146.33614 06-25-06 <3 325 1 34.6 <.05 < .2 18.9 <.02 MH30 C-285568 06AK15LG-RA RA 63.29633 -146.30942 06-25-06 <3 12.9 <1 11.4 <.05 < .2 6.54 <.02 C-285550 Blank-ocala-RA RA – – 06-24-10 <3 <2 <1 <.2 <.05 < .2 <.2 <.02 C-285551 Blank-rich-RA RA – – 06-24-10 <3 <2 <1 <.2 <.05 < .2 <.2 <.02
Table 5 31 Table 5. Map, laboratory, and field numbers, sample treatment, site latitude and longitude, and cation and trace-element chemistry of filtered (FA) and unfiltered (RA) acidified surface-water samples, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. Surface-water cation and trace-element chemistry determined using inductively coupled plasma-mass spectrometry (ICP-MS). Filter and treatment: 0.1FA, passed through 0.1-μm filter, acidified; 0.45FA, passed through 0.45-μm filter, acidified. Field No.: repl., field replicate. Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; μm, micrometer; mg/L, milligram per liter; <, less than; –, not applicable] Map No. Laboratory No. Field No. Filter and treatment Latitude (°N) Longitude (°W) Date collected Ce Co Cr Cs Cu Dy Er Eu Unfiltered, acidifed MH1 C-285535 06AK01-RA RA 63.32227 -146.04453 06-21-06 0.02 <0.02 <1 < 0.02 0.52 < 0.005 < 0.005 < 0.005 MH2 C-285536 06AK02-RA RA 63.30497 -146.01581 06-21-06 < .01 .02 <1 < .02 <.5 < .005 < .005 < .005 MH3 C-285537 06AK03-RA RA 63.30404 -146.04607 06-21-06 < .01 .04 <1 < .02 <.5 < .005 < .005 < .005 MH4 C-285538 06AK04-RA RA 63.30370 -146.04990 06-21-06 .42 1.92 1 < .02 25 .26 .16 .05 MH5 C-285539 06AK05-RA RA 63.30473 -146.05590 06-21-06 .61 2.38 1.2 .02 34.2 .36 .23 .072 MH6 C-285540 06AK06-RA RA 63.29038 -146.04857 06-21-06 .25 1.37 1 < .02 14.7 .16 .097 .03 MH7 C-285541 06AK07-RA RA 63.24325 -146.06044 06-22-06 < .01 <.02 2.6 1.18 .51 < .005 < .005 < .005 C-285542 06AK07-RA repl. RA 63.24325 -146.06044 06-22-06 < .01 <.02 2.7 1.2 .52 < .005 < .005 < .005 MH8 C-285543 06AK08-RA RA 63.24343 -146.06023 06-22-06 < .01 <.02 2.3 1.32 .71 < .005 < .005 < .005 MH9 C-285544 06AK09-RA RA 63.23375 -146.07518 06-22-06 .04 .1 <1 .07 1.8 .009 .005 < .005 MH10 C-285545 06AK10-RA RA 63.23109 -146.02482 06-22-06 .02 .03 <1 .37 2.1 .006 < .005 < .005 MH11 C-285546 06AK11-RA RA 63.25372 -146.17209 06-22-06 .03 .03 <1 .02 1.3 .008 .005 < .005 MH12 C-285547 06AK12-RA RA 63.26160 -146.19040 06-22-06 .02 <.02 <1 .02 1.2 .005 < .005 < .005 MH13 C-285548 06AK13-RA RA 63.21561 -145.96478 06-23-06 < .01 .02 <1 < .02 .98 < .005 < .005 < .005 MH14 C-285549 06AK14-RA RA 63.06788 -145.77942 06-23-06 .15 .09 <1 < .02 4.6 .02 .01 .007 MH15 C-285552 06AK15-RA RA 63.20863 -145.94130 06-24-06 .02 .04 <1 < .02 1.9 < .005 < .005 < .005 MH16 C-285553 06AK16-RA RA 63.23763 -146.12909 06-24-06 .04 .03 <1 < .02 1.1 .009 .005 < .005 MH17 C-285554 06AK17-RA RA 63.27634 -146.27193 06-25-06 .01 .13 <1 < .02 1.4 < .005 < .005 < .005 MH18 C-285555 06AK18-RA RA 63.28515 -146.32445 06-25-06 .05 .03 <1 .09 1.3 .01 .009 < .005 MH19 C-285556 06AK19-RA RA 63.31868 -146.32762 06-25-06 .29 .3 2 .18 2.9 .03 .02 .007 MH20 C-285557 06AK20-RA RA 63.22520 -145.93295 06-25-06 < .01 .06 <1 < .02 2.3 .006 < .005 < .005 C-285558 06AK20-RA repl. RA 63.22520 -145.93295 06-25-06 < .01 .06 <1 < .02 2.3 < .005 < .005 < .005 MH21 C-285559 06AK06LG-RA RA 63.07365 -145.74760 06-20-06 .02 .1 <1 < .02 .88 .005 < .005 < .005 MH22 C-285560 06AK07LG-RA RA 63.09626 -145.75070 06-20-06 < .01 .04 <1 < .02 .7 < .005 < .005 < .005 MH23 C-285561 06AK08LG-RA RA 63.22570 -146.05507 06-22-06 < .01 .06 <1 < .02 1.4 .005 < .005 < .005 MH24 C-285562 06AK09LG-RA RA 63.22648 -146.18576 06-22-06 .02 .04 <1 < .02 .69 < .005 < .005 < .005 MH25 C-285563 06AK10LG-RA RA 63.05607 -145.87636 06-23-06 .06 .06 <1 < .02 2 .01 .008 < .005 MH26 C-285564 06AK11LG-RA RA 63.22106 -145.91483 06-24-06 .03 .07 <1 < .02 1.6 .005 < .005 < .005 MH27 C-285565 06AK12LG-RA RA 63.27527 -146.27946 06-25-06 .02 .09 <1 < .02 3.2 .006 < .005 < .005 MH28 C-285566 06AK13LG-RA RA 63.27890 -146.31895 06-25-06 .02 .27 <1 .03 1.4 < .005 < .005 < .005 MH29 C-285567 06AK14LG-RA RA 63.33512 -146.33614 06-25-06 .11 .65 5.2 < .02 2.2 .02 .01 .008 MH30 C-285568 06AK15LG-RA RA 63.29633 -146.30942 06-25-06 .01 .04 <1 < .02 .73 .005 < .005 < .005 C-285550 Blank-ocala-RA RA – – 06-24-10 < .01 <.02 <1 < .02 <.5 < .005 < .005 < .005 C-285551 Blank-rich-RA RA – – 06-24-10 < .01 <.02 <1 < .02 <.5 < .005 < .005 < .005
32 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska Table 5. Map, laboratory, and field numbers, sample treatment, site latitude and longitude, and cation and trace-element chemistry of filtered (FA) and unfiltered (RA) acidified surface-water samples, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. Surface-water cation and trace-element chemistry determined using inductively coupled plasma-mass spectrometry (ICP-MS). Filter and treatment: 0.1FA, passed through 0.1-μm filter, acidified; 0.45FA, passed through 0.45-μm filter, acidified. Field No.: repl., field replicate. Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; μm, micrometer; mg/L, milligram per liter; <, less than; –, not applicable] Map No. Laboratory No. Field No. Filter and treatment Latitude (°N) Longitude (°W) Date collected Fe Ga Gd Ge Ho K La Li Unfiltered, acidifed MH1 C-285535 06AK01-RA RA 63.32227 -146.04453 06-21-06 <50 < 0.05 0.008 < 0.05 < 0.005 0.58 0.02 3.1 MH2 C-285536 06AK02-RA RA 63.30497 -146.01581 06-21-06 <50 < .05 < .005 < .05 < .005 .06 < .01 < .1 MH3 C-285537 06AK03-RA RA 63.30404 -146.04607 06-21-06 <50 < .05 < .005 < .05 < .005 .1 < .01 < .1 MH4 C-285538 06AK04-RA RA 63.30370 -146.04990 06-21-06 93 < .05 .26 < .05 .054 .2 .38 .6 MH5 C-285539 06AK05-RA RA 63.30473 -146.05590 06-21-06 117 < .05 .37 < .05 .077 .2 .57 1.1 MH6 C-285540 06AK06-RA RA 63.29038 -146.04857 06-21-06 84 < .05 .15 < .05 .04 .2 .22 .5 MH7 C-285541 06AK07-RA RA 63.24325 -146.06044 06-22-06 <50 < .05 < .005 < .05 < .005 .68 < .01 11.9 C-285542 06AK07-RA repl. RA 63.24325 -146.06044 06-22-06 <50 < .05 < .005 < .05 < .005 .7 < .01 12.8 MH8 C-285543 06AK08-RA RA 63.24343 -146.06023 06-22-06 <50 < .05 < .005 < .05 < .005 .73 < .01 12.9 MH9 C-285544 06AK09-RA RA 63.23375 -146.07518 06-22-06 121 < .05 .01 < .05 < .005 .1 .03 2.9 MH10 C-285545 06AK10-RA RA 63.23109 -146.02482 06-22-06 <50 < .05 .006 < .05 < .005 .2 .01 2.9 MH11 C-285546 06AK11-RA RA 63.25372 -146.17209 06-22-06 <50 < .05 .01 < .05 < .005 .05 .02 .9 MH12 C-285547 06AK12-RA RA 63.26160 -146.19040 06-22-06 <50 < .05 < .005 < .05 < .005 .1 .01 .2 MH13 C-285548 06AK13-RA RA 63.21561 -145.96478 06-23-06 <50 < .05 < .005 < .05 < .005 .1 < .01 1.9 MH14 C-285549 06AK14-RA RA 63.06788 -145.77942 06-23-06 90 < .05 .03 < .05 .005 .41 .08 .2 MH15 C-285552 06AK15-RA RA 63.20863 -145.94130 06-24-06 <50 < .05 .005 < .05 < .005 .09 .01 2 MH16 C-285553 06AK16-RA RA 63.23763 -146.12909 06-24-06 <50 < .05 .01 < .05 < .005 .08 .03 < .1 MH17 C-285554 06AK17-RA RA 63.27634 -146.27193 06-25-06 223 < .05 < .005 < .05 < .005 .06 .01 .5 MH18 C-285555 06AK18-RA RA 63.28515 -146.32445 06-25-06 <50 < .05 .01 < .05 < .005 .2 .06 .8 MH19 C-285556 06AK19-RA RA 63.31868 -146.32762 06-25-06 354 .06 .04 .1 .007 .41 .17 2.7 MH20 C-285557 06AK20-RA RA 63.22520 -145.93295 06-25-06 <50 < .05 < .005 < .05 < .005 .3 .01 2.4 C-285558 06AK20-RA repl. RA 63.22520 -145.93295 06-25-06 <50 < .05 .006 < .05 < .005 .31 .01 2.5 MH21 C-285559 06AK06LG-RA RA 63.07365 -145.74760 06-20-06 184 < .05 < .005 < .05 < .005 .08 .01 .1 MH22 C-285560 06AK07LG-RA RA 63.09626 -145.75070 06-20-06 182 < .05 < .005 < .05 < .005 .1 < .01 < .1 MH23 C-285561 06AK08LG-RA RA 63.22570 -146.05507 06-22-06 <50 < .05 < .005 < .05 < .005 .1 < .01 .2 MH24 C-285562 06AK09LG-RA RA 63.22648 -146.18576 06-22-06 <50 < .05 .005 < .05 < .005 .08 .02 .1 MH25 C-285563 06AK10LG-RA RA 63.05607 -145.87636 06-23-06 85 < .05 .01 < .05 < .005 .51 .03 .7 MH26 C-285564 06AK11LG-RA RA 63.22106 -145.91483 06-24-06 <50 < .05 < .005 < .05 < .005 .2 .02 3.3 MH27 C-285565 06AK12LG-RA RA 63.27527 -146.27946 06-25-06 118 < .05 < .005 < .05 < .005 .2 .02 1.4 MH28 C-285566 06AK13LG-RA RA 63.27890 -146.31895 06-25-06 239 < .05 .006 < .05 < .005 .2 .02 1.5 MH29 C-285567 06AK14LG-RA RA 63.33512 -146.33614 06-25-06 528 .08 .02 < .05 < .005 .3 .05 .4 MH30 C-285568 06AK15LG-RA RA 63.29633 -146.30942 06-25-06 <50 < .05 < .005 < .05 < .005 .55 .02 .5 C-285550 Blank-ocala-RA RA – – 06-24-10 <50 < .05 < .005 < .05 < .005 <.03 < .01 .4 C-285551 Blank-rich-RA RA – – 06-24-10 <50 < .05 < .005 < .05 < .005 <.03 < .01 .3
Table 5 33 Table 5. Map, laboratory, and field numbers, sample treatment, site latitude and longitude, and cation and trace-element chemistry of filtered (FA) and unfiltered (RA) acidified surface-water samples, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. Surface-water cation and trace-element chemistry determined using inductively coupled plasma-mass spectrometry (ICP-MS). Filter and treatment: 0.1FA, passed through 0.1-μm filter, acidified; 0.45FA, passed through 0.45-μm filter, acidified. Field No.: repl., field replicate. Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; μm, micrometer; mg/L, milligram per liter; <, less than; –, not applicable] Map No. Laboratory No. Field No. Filter and treatment Latitude (°N) Longitude (°W) Date collected Lu Mg Mn Mo Na Nb Nd Ni Unfiltered, acidifed MH1 C-285535 06AK01-RA RA 63.32227 -146.04453 06-21-06 < 0.1 9.91 1.1 < 2 9.56 < 0.2 0.02 <0.4 MH2 C-285536 06AK02-RA RA 63.30497 -146.01581 06-21-06 < .1 .84 .3 < 2 .96 < .2 < .01 <.4 MH3 C-285537 06AK03-RA RA 63.30404 -146.04607 06-21-06 < .1 2.25 1.9 < 2 1.63 .89 < .01 2.7 MH4 C-285538 06AK04-RA RA 63.30370 -146.04990 06-21-06 < .1 5.36 30.2 < 2 2.04 .46 .56 8.9 MH5 C-285539 06AK05-RA RA 63.30473 -146.05590 06-21-06 < .1 6.8 39.8 < 2 2.28 .27 .85 10.8 MH6 C-285540 06AK06-RA RA 63.29038 -146.04857 06-21-06 < .1 5.29 23.3 < 2 2.14 < .2 .33 7.9 MH7 C-285541 06AK07-RA RA 63.24325 -146.06044 06-22-06 < .1 20.8 <.2 < 2 .73 < .2 < .01 1.4 C-285542 06AK07-RA repl. RA 63.24325 -146.06044 06-22-06 < .1 21.1 <.2 < 2 .72 < .2 < .01 1.5 MH8 C-285543 06AK08-RA RA 63.24343 -146.06023 06-22-06 < .1 22.4 .2 < 2 .9 < .2 < .01 1.8 MH9 C-285544 06AK09-RA RA 63.23375 -146.07518 06-22-06 < .1 3.38 5.3 < 2 .43 < .2 .04 5.4 MH10 C-285545 06AK10-RA RA 63.23109 -146.02482 06-22-06 < .1 5.77 <.2 < 2 .49 1.02 .02 8.4 MH11 C-285546 06AK11-RA RA 63.25372 -146.17209 06-22-06 < .1 4.37 .4 < 2 .3 .49 .03 4.3 MH12 C-285547 06AK12-RA RA 63.26160 -146.19040 06-22-06 < .1 6.42 .2 < 2 .3 .2 .02 4.6 MH13 C-285548 06AK13-RA RA 63.21561 -145.96478 06-23-06 < .1 11.8 <.2 < 2 .23 < .2 < .01 4.3 MH14 C-285549 06AK14-RA RA 63.06788 -145.77942 06-23-06 < .1 3.48 1.4 < 2 .29 < .2 .11 9.1 MH15 C-285552 06AK15-RA RA 63.20863 -145.94130 06-24-06 < .1 11 .3 < 2 .4 < .2 .02 7.1 MH16 C-285553 06AK16-RA RA 63.23763 -146.12909 06-24-06 < .1 1.95 .4 < 2 .35 < .2 .05 1.4 MH17 C-285554 06AK17-RA RA 63.27634 -146.27193 06-25-06 < .1 4.27 7.2 < 2 .47 < .2 .02 9.9 MH18 C-285555 06AK18-RA RA 63.28515 -146.32445 06-25-06 < .1 1.25 .9 < 2 .6 < .2 .06 2.8 MH19 C-285556 06AK19-RA RA 63.31868 -146.32762 06-25-06 < .1 3.44 7.7 < 2 1.4 < .2 .17 2.4 MH20 C-285557 06AK20-RA RA 63.22520 -145.93295 06-25-06 < .1 13.1 .3 < 2 .33 < .2 .01 8.7 C-285558 06AK20-RA repl. RA 63.22520 -145.93295 06-25-06 < .1 13.1 .2 < 2 .33 < .2 .01 8.8 MH21 C-285559 06AK06LG-RA RA 63.07365 -145.74760 06-20-06 < .1 5.71 6.9 < 2 .4 < .2 .02 5.1 MH22 C-285560 06AK07LG-RA RA 63.09626 -145.75070 06-20-06 < .1 10.5 7.6 < 2 1.14 < .2 < .01 4.3 MH23 C-285561 06AK08LG-RA RA 63.22570 -146.05507 06-22-06 < .1 10.9 3 < 2 .27 < .2 < .01 7.7 MH24 C-285562 06AK09LG-RA RA 63.22648 -146.18576 06-22-06 < .1 0.25 1.2 < 2 .35 < .2 .02 <.4 MH25 C-285563 06AK10LG-RA RA 63.05607 -145.87636 06-23-06 < .1 7.14 1.7 < 2 1.17 < .2 .05 1.8 MH26 C-285564 06AK11LG-RA RA 63.22106 -145.91483 06-24-06 < .1 16.2 .5 < 2 .93 < .2 .03 3.1 MH27 C-285565 06AK12LG-RA RA 63.27527 -146.27946 06-25-06 < .1 6.01 4.4 < 2 .9 < .2 .02 8.9 MH28 C-285566 06AK13LG-RA RA 63.27890 -146.31895 06-25-06 < .1 3.79 16.8 < 2 1.1 1 .02 6.2 MH29 C-285567 06AK14LG-RA RA 63.33512 -146.33614 06-25-06 < .1 5.48 12.2 < 2 1.02 .47 .06 8.6 MH30 C-285568 06AK15LG-RA RA 63.29633 -146.30942 06-25-06 < .1 1.26 1.2 < 2 1.13 .28 .02 <.4 C-285550 Blank-ocala-RA RA – – 06-24-10 < .1 <.01 <.2 < 2 <.01 < .2 < .01 <.4 C-285551 Blank-rich-RA RA – – 06-24-10 < .1 <.01 <.2 < 2 <.01 < .2 < .01 <.4
34 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska Table 5. Map, laboratory, and field numbers, sample treatment, site latitude and longitude, and cation and trace-element chemistry of filtered (FA) and unfiltered (RA) acidified surface-water samples, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. Surface-water cation and trace-element chemistry determined using inductively coupled plasma-mass spectrometry (ICP-MS). Filter and treatment: 0.1FA, passed through 0.1-μm filter, acidified; 0.45FA, passed through 0.45-μm filter, acidified. Field No.: repl., field replicate. Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; μm, micrometer; mg/L, milligram per liter; <, less than; –, not applicable] Map No. Laboratory No. Field No. Filter and treatment Latitude (°N) Longitude (°W) Date collected P Pb Pr Rb Sb Sc Se SiO2 Unfiltered, acidifed MH1 C-285535 06AK01-RA RA 63.32227 -146.04453 06-21-06 < 0.01 <0.05 < 0.01 0.31 0.46 < 0.6 1.2 3.5 MH2 C-285536 06AK02-RA RA 63.30497 -146.01581 06-21-06 < .01 <.05 < .01 .08 <.3 < .6 < 1 5.6 MH3 C-285537 06AK03-RA RA 63.30404 -146.04607 06-21-06 < .01 <.05 < .01 .15 1.12 < .6 < 1 5.8 MH4 C-285538 06AK04-RA RA 63.30370 -146.04990 06-21-06 < .01 <.05 .11 .28 .69 .6 < 1 6.2 MH5 C-285539 06AK05-RA RA 63.30473 -146.05590 06-21-06 < .01 <.05 .16 .36 .62 .6 1 6.4 MH6 C-285540 06AK06-RA RA 63.29038 -146.04857 06-21-06 < .01 <.05 .06 .28 .43 .6 < 1 6.3 MH7 C-285541 06AK07-RA RA 63.24325 -146.06044 06-22-06 < .01 <.05 < .01 3.18 2.44 2.2 < 1 23.3 C-285542 06AK07-RA repl. RA 63.24325 -146.06044 06-22-06 < .01 <.05 < .01 3.13 2.46 2.1 < 1 24 MH8 C-285543 06AK08-RA RA 63.24343 -146.06023 06-22-06 < .01 <.05 < .01 3.31 2.23 2.1 < 1 24.2 MH9 C-285544 06AK09-RA RA 63.23375 -146.07518 06-22-06 < .01 <.05 < .01 .3 <.3 .6 < 1 7 MH10 C-285545 06AK10-RA RA 63.23109 -146.02482 06-22-06 < .01 <.05 < .01 .57 1.2 .9 < 1 10.3 MH11 C-285546 06AK11-RA RA 63.25372 -146.17209 06-22-06 < .01 <.05 < .01 .11 .4 .7 < 1 7.5 MH12 C-285547 06AK12-RA RA 63.26160 -146.19040 06-22-06 < .01 <.05 < .01 .17 <.3 .8 < 1 9.3 MH13 C-285548 06AK13-RA RA 63.21561 -145.96478 06-23-06 < .01 <.05 < .01 .24 <.3 < .6 < 1 6.4 MH14 C-285549 06AK14-RA RA 63.06788 -145.77942 06-23-06 .01 <.05 .02 .67 <.3 .8 < 1 9.8 MH15 C-285552 06AK15-RA RA 63.20863 -145.94130 06-24-06 < .01 <.05 < .01 .16 <.3 .8 < 1 10.2 MH16 C-285553 06AK16-RA RA 63.23763 -146.12909 06-24-06 < .01 <.05 < .01 .13 <.3 < .6 < 1 6.9 MH17 C-285554 06AK17-RA RA 63.27634 -146.27193 06-25-06 < .01 <.05 < .01 .1 <.3 .8 < 1 10.6 MH18 C-285555 06AK18-RA RA 63.28515 -146.32445 06-25-06 < .01 <.05 .02 .25 <.3 < .6 < 1 6.9 MH19 C-285556 06AK19-RA RA 63.31868 -146.32762 06-25-06 .02 .09 .04 2.06 .71 .8 < 1 7.9 MH20 C-285557 06AK20-RA RA 63.22520 -145.93295 06-25-06 < .01 <.05 < .01 .67 .45 .8 < 1 9.2 C-285558 06AK20-RA repl. RA 63.22520 -145.93295 06-25-06 < .01 <.05 < .01 .69 .36 .8 < 1 9.1 MH21 C-285559 06AK06LG-RA RA 63.07365 -145.74760 06-20-06 .01 <.05 < .01 .14 <.3 < .6 < 1 1.3 MH22 C-285560 06AK07LG-RA RA 63.09626 -145.75070 06-20-06 < .01 <.05 < .01 .13 <.3 .6 < 1 7.1 MH23 C-285561 06AK08LG-RA RA 63.22570 -146.05507 06-22-06 < .01 <.05 < .01 .27 <.3 1.1 < 1 12.9 MH24 C-285562 06AK09LG-RA RA 63.22648 -146.18576 06-22-06 < .01 <.05 < .01 .11 <.3 < .6 < 1 3.3 MH25 C-285563 06AK10LG-RA RA 63.05607 -145.87636 06-23-06 < .01 <.05 .01 .39 <.3 .9 < 1 10.3 MH26 C-285564 06AK11LG-RA RA 63.22106 -145.91483 06-24-06 < .01 .2 < .01 .28 <.3 < .6 < 1 5.6 MH27 C-285565 06AK12LG-RA RA 63.27527 -146.27946 06-25-06 < .01 .3 < .01 .21 <.3 .7 < 1 9.1 MH28 C-285566 06AK13LG-RA RA 63.27890 -146.31895 06-25-06 < .01 <.05 < .01 .27 1.2 .6 < 1 7.2 MH29 C-285567 06AK14LG-RA RA 63.33512 -146.33614 06-25-06 < .01 <.05 .01 .32 .58 < .6 < 1 4.3 MH30 C-285568 06AK15LG-RA RA 63.29633 -146.30942 06-25-06 < .01 <.05 < .01 1.03 .4 < .6 < 1 6.4 C-285550 Blank-ocala-RA RA – – 06-24-10 < .01 <.05 < .01 < .01 <.3 < .6 < 1 < .2 C-285551 Blank-rich-RA RA – – 06-24-10 < .01 <.05 < .01 < .01 <.3 < .6 < 1 < .2
Table 5 35 Table 5. Map, laboratory, and field numbers, sample treatment, site latitude and longitude, and cation and trace-element chemistry of filtered (FA) and unfiltered (RA) acidified surface-water samples, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. Surface-water cation and trace-element chemistry determined using inductively coupled plasma-mass spectrometry (ICP-MS). Filter and treatment: 0.1FA, passed through 0.1-μm filter, acidified; 0.45FA, passed through 0.45-μm filter, acidified. Field No.: repl., field replicate. Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; μm, micrometer; mg/L, milligram per liter; <, less than; –, not applicable] Map No. Laboratory No. Field No. Filter and treatment Latitude (°N) Longitude (°W) Date collected Sm SO4 Sr Ta Tb Th Ti Tl Unfiltered, acidifed MH1 C-285535 06AK01-RA RA 63.32227 -146.04453 06-21-06 < 0.01 48 161 < 0.02 < 0.005 < 0.2 1.3 <0.1 MH2 C-285536 06AK02-RA RA 63.30497 -146.01581 06-21-06 < .01 7 2.83 < .02 < .005 <.2 .6 <.1 MH3 C-285537 06AK03-RA RA 63.30404 -146.04607 06-21-06 < .01 24 6.17 .05 < .005 < .2 1.1 <.1 MH4 C-285538 06AK04-RA RA 63.30370 -146.04990 06-21-06 .14 42 56.3 .03 .04 < .2 2.6 <.1 MH5 C-285539 06AK05-RA RA 63.30473 -146.05590 06-21-06 .21 48 81.4 < .02 .057 < .2 2.7 <.1 MH6 C-285540 06AK06-RA RA 63.29038 -146.04857 06-21-06 .08 43 61.8 < .02 .02 < .2 2.7 <.1 MH7 C-285541 06AK07-RA RA 63.24325 -146.06044 06-22-06 < .01 7 36.8 < .02 < .005 < .2 < .5 <.1 C-285542 06AK07-RA repl. RA 63.24325 -146.06044 06-22-06 < .01 7 36.8 < .02 < .005 < .2 .5 <.1 MH8 C-285543 06AK08-RA RA 63.24343 -146.06023 06-22-06 < .01 8 39 < .02 < .005 < .2 < .5 <.1 MH9 C-285544 06AK09-RA RA 63.23375 -146.07518 06-22-06 .01 < 2 5.82 < .02 < .005 < .2 1.4 <.1 MH10 C-285545 06AK10-RA RA 63.23109 -146.02482 06-22-06 < .01 < 2 6.8 .06 < .005 < .2 .5 <.1 MH11 C-285546 06AK11-RA RA 63.25372 -146.17209 06-22-06 < .01 < 2 5.5 .03 < .005 < .2 .6 <.1 MH12 C-285547 06AK12-RA RA 63.26160 -146.19040 06-22-06 < .01 < 2 6.03 < .02 < .005 < .2 < .5 <.1 MH13 C-285548 06AK13-RA RA 63.21561 -145.96478 06-23-06 < .01 2 4.81 < .02 < .005 < .2 < .5 <.1 MH14 C-285549 06AK14-RA RA 63.06788 -145.77942 06-23-06 .03 < 2 9.05 < .02 < .005 < .2 1.9 <.1 MH15 C-285552 06AK15-RA RA 63.20863 -145.94130 06-24-06 < .01 3 7.42 < .02 < .005 < .2 < .5 <.1 MH16 C-285553 06AK16-RA RA 63.23763 -146.12909 06-24-06 .01 < 2 6.68 < .02 < .005 < .2 < .5 <.1 MH17 C-285554 06AK17-RA RA 63.27634 -146.27193 06-25-06 < .01 < 2 9.73 < .02 < .005 < .2 < .5 <.1 MH18 C-285555 06AK18-RA RA 63.28515 -146.32445 06-25-06 .02 < 2 12.5 < .02 < .005 < .2 < .5 <.1 MH19 C-285556 06AK19-RA RA 63.31868 -146.32762 06-25-06 .03 8 49.2 .03 .006 < .2 6 <.1 MH20 C-285557 06AK20-RA RA 63.22520 -145.93295 06-25-06 < .01 7 11.6 .03 < .005 < .2 < .5 <.1 C-285558 06AK20-RA repl. RA 63.22520 -145.93295 06-25-06 < .01 7 11.8 .02 < .005 < .2 < .5 <.1 MH21 C-285559 06AK06LG-RA RA 63.07365 -145.74760 06-20-06 < .01 < 2 7.22 .02 < .005 < .2 .6 <.1 MH22 C-285560 06AK07LG-RA RA 63.09626 -145.75070 06-20-06 < .01 3 17.3 < .02 < .005 < .2 < .5 <.1 MH23 C-285561 06AK08LG-RA RA 63.22570 -146.05507 06-22-06 < .01 3 7.18 < .02 < .005 < .2 < .5 <.1 MH24 C-285562 06AK09LG-RA RA 63.22648 -146.18576 06-22-06 < .01 < 2 4.62 < .02 < .005 < .2 2 <.1 MH25 C-285563 06AK10LG-RA RA 63.05607 -145.87636 06-23-06 .01 2 37.7 < .02 < .005 < .2 2.4 <.1 MH26 C-285564 06AK11LG-RA RA 63.22106 -145.91483 06-24-06 < .01 11 8.04 < .02 < .005 < .2 .9 <.1 MH27 C-285565 06AK12LG-RA RA 63.27527 -146.27946 06-25-06 < .01 < 2 14.2 < .02 < .005 < .2 .5 <.1 MH28 C-285566 06AK13LG-RA RA 63.27890 -146.31895 06-25-06 < .01 < 2 15.2 .06 < .005 < .2 .7 <.1 MH29 C-285567 06AK14LG-RA RA 63.33512 -146.33614 06-25-06 < .01 20 109 .03 < .005 < .2 12.4 <.1 MH30 C-285568 06AK15LG-RA RA 63.29633 -146.30942 06-25-06 < .01 11 28.8 < .02 < .005 < .2 .7 <.1 C-285550 Blank-ocala-RA RA – – 06-24-10 < .01 < 2 < .5 < .02 < .005 < .2 < .5 <.1 C-285551 Blank-rich-RA RA – – 06-24-10 < .01 < 2 < .5 < .02 < .005 < .2 < .5 <.1
36 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska Table 5. Map, laboratory, and field numbers, sample treatment, site latitude and longitude, and cation and trace-element chemistry of filtered (FA) and unfiltered (RA) acidified surface-water samples, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. Surface-water cation and trace-element chemistry determined using inductively coupled plasma-mass spectrometry (ICP-MS). Filter and treatment: 0.1FA, passed through 0.1-μm filter, acidified; 0.45FA, passed through 0.45-μm filter, acidified. Field No.: repl., field replicate. Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; μm, micrometer; mg/L, milligram per liter; <, less than; –, not applicable] Map No. Laboratory No. Field No. Filter and treatment Latitude (°N) Longitude (°W) Date collected Tm U V

W

Y Yb Zn Zr

Unfiltered, acidifed

MH1 C-285535 06AK01-RA RA 63.32227 -146.04453 06-21-06 < 0.005 0.36 0.8 < 0.5 0.04 0.005 0.8 < 0.2

MH2 C-285536 06AK02-RA RA 63.30497 -146.01581 06-21-06 < .005 < .1 .5 < .5 < .01 < .005 1.6 < .2

MH3 C-285537 06AK03-RA RA 63.30404 -146.04607 06-21-06 < .005 < .1 .6 .95 < .01 < .005 2 < .2

MH4 C-285538 06AK04-RA RA 63.30370 -146.04990 06-21-06 .02 < .1 .8 < .5 1.69 .13 7.1 < .2

MH5 C-285539 06AK05-RA RA 63.30473 -146.05590 06-21-06 .03 .13 .8 < .5 2.54 .17 9.6 < .2

MH6 C-285540 06AK06-RA RA 63.29038 -146.04857 06-21-06 .01 < .1 .7 < .5 1.04 .08 5.6 < .2

MH7 C-285541 06AK07-RA RA 63.24325 -146.06044 06-22-06 < .005 < .1 .5 < .5 < .01 < .005 <.5 < .2

C-285542 06AK07-RA repl. RA 63.24325 -146.06044 06-22-06 < .005 < .1 .5 < .5 < .01 < .005 .7 < .2

MH8 C-285543 06AK08-RA RA 63.24343 -146.06023 06-22-06 < .005 < .1 <.5 < .5 < .01 < .005 <.5 < .2

MH9 C-285544 06AK09-RA RA 63.23375 -146.07518 06-22-06 < .005 < .1 <.5 < .5 .04 .005 .5 < .2

MH10 C-285545 06AK10-RA RA 63.23109 -146.02482 06-22-06 < .005 < .1 <.5 .95 .02 < .005 <.5 < .2

MH11 C-285546 06AK11-RA RA 63.25372 -146.17209 06-22-06 < .005 < .1 <.5 < .5 .04 .007 .6 < .2

MH12 C-285547 06AK12-RA RA 63.26160 -146.19040 06-22-06 < .005 < .1 <.5 < .5 .02 < .005 <.5 < .2

MH13 C-285548 06AK13-RA RA 63.21561 -145.96478 06-23-06 < .005 < .1 <.5 < .5 < .01 < .005 <.5 < .2

MH14 C-285549 06AK14-RA RA 63.06788 -145.77942 06-23-06 < .005 < .1 <.5 < .5 .11 .01 1.9 .2

MH15 C-285552 06AK15-RA RA 63.20863 -145.94130 06-24-06 < .005 < .1 <.5 < .5 .02 < .005 .7 < .2

MH16 C-285553 06AK16-RA RA 63.23763 -146.12909 06-24-06 < .005 < .1 <.5 < .5 .05 < .005 .6 < .2

MH17 C-285554 06AK17-RA RA 63.27634 -146.27193 06-25-06 < .005 < .1 <.5 < .5 .02 < .005 <.5 < .2

MH18 C-285555 06AK18-RA RA 63.28515 -146.32445 06-25-06 < .005 < .1 <.5 < .5 .08 .009 .6 < .2

MH19 C-285556 06AK19-RA RA 63.31868 -146.32762 06-25-06 < .005 .6 1.1 < .5 .15 .01 1.7 < .2

MH20 C-285557 06AK20-RA RA 63.22520 -145.93295 06-25-06 < .005 < .1 <.5 < .5 .02 < .005 <.5 < .2

C-285558 06AK20-RA repl. RA 63.22520 -145.93295 06-25-06 < .005 < .1 <.5 < .5 .02 .005 .7 < .2

MH21 C-285559 06AK06LG-RA RA 63.07365 -145.74760 06-20-06 < .005 < .1 <.5 < .5 < .01 < .005 .9 < .2

MH22 C-285560 06AK07LG-RA RA 63.09626 -145.75070 06-20-06 < .005 < .1 <.5 < .5 < .01 < .005 <.5 < .2

MH23 C-285561 06AK08LG-RA RA 63.22570 -146.05507 06-22-06 < .005 < .1 <.5 < .5 < .01 < .005 <.5 < .2

MH24 C-285562 06AK09LG-RA RA 63.22648 -146.18576 06-22-06 < .005 < .1 <.5 < .5 .02 < .005 <.5 < .2

MH25 C-285563 06AK10LG-RA RA 63.05607 -145.87636 06-23-06 < .005 < .1 .8 < .5 .06 .009 1 < .2

MH26 C-285564 06AK11LG-RA RA 63.22106 -145.91483 06-24-06 < .005 < .1 <.5 < .5 .02 < .005 2.6 < .2

MH27 C-285565 06AK12LG-RA RA 63.27527 -146.27946 06-25-06 < .005 < .1 <.5 < .5 .02 < .005 3.8 < .2

MH28 C-285566 06AK13LG-RA RA 63.27890 -146.31895 06-25-06 < .005 < .1 <.5 .99 .02 < .005 .5 < .2

MH29 C-285567 06AK14LG-RA RA 63.33512 -146.33614 06-25-06 < .005 .13 .7 < .5 .07 .006 1.2 < .2

MH30 C-285568 06AK15LG-RA RA 63.29633 -146.30942 06-25-06 < .005 < .1 <.5 < .5 .02 < .005 <.5 < .2

C-285550 Blank-ocala-RA RA – – 06-24-10 < .005 < .1 <.5 < .5 < .01 < .005 <.5 < .2

C-285551 Blank-rich-RA RA – – 06-24-10 < .005 < .1 <.5 < .5 < .01 < .005 1.1 < .2
Table 6 37

Table 6. Map and field numbers, major anion chemistry of filtered unacidified (FU) surface water samples, Tangle Lakes District, 

Alaska.

[Map Nos. are shown in figure 3. All values are in milligrams per liter. Surface-water major anion chemistry determined by ion chormatography (IC). Filter and 

treatment: 0.45FU, passed through 0.45 μm-filter, unacidified. Abbreviations: o, degrees; N, North; W, West; repl., field replicate; dup, laboratory duplicate; 

NQ, not quantified; ND, not detected; –, not applicable; <, less than]

Map No. Field 

No.

Filter and 

treatment

Latitude

(°N)

Longitude

(°W)

Date 

collected F– Cl– NO3

– SO42–

MH1 06AK01-.45FU 0.45FU 63.32227 -146.04453 06-21-06 0.15 0.07 NQ 61.5

MH2 06AK02-.45FU 0.45FU 63.30497 -146.01581 06-21-06 <.01 .01 0.05 9.5

MH3 06AK03-.45FU 0.45FU 63.30404 -146.04607 06-21-06 <.01 .24 .26 32.2

MH3 06AK03-.45FU dup. 0.45FU 63.30404 -146.04607 06-21-06 <.01 .21 .25 30.4

MH4 06AK04-.45FU 0.45FU 63.30370 -146.04990 06-21-06 .05 .21 .26 58.4

MH5 06AK05-.45FU 0.45FU 63.30473 -146.05590 06-21-06 .05 .16 .04 66.9

MH6 06AK06-.45FU 0.45FU 63.29038 -146.04857 06-21-06 .02 .38 NQ 50.9

MH7 06AK07-.45FU 0.45FU 63.24325 -146.06044 06-22-06 .01 .11 ND 9.2

MH7 06AK07-.45FU repl. 0.45FU 63.24325 -146.06044 06-22-06 .05 .1 ND 9.2

MH8 06AK08-.45FU 0.45FU 63.24343 -146.06023 06-22-06 .06 .16 ND 10

MH9 06AK09-.45FU 0.45FU 63.23375 -146.07518 06-22-06 .01 .05 .73 .8

MH10 06AK10-.45FU 0.45FU 63.23109 -146.02482 06-22-06 <.01 .07 ND 1.25

MH11 06AK11-.45FU 0.45FU 63.25372 -146.17209 06-22-06 <.01 .04 ND .59

MH12 06AK12-.45FU 0.45FU 63.26160 -146.19040 06-22-06 <.01 .09 ND 1.48

MH13 06AK13-.45FU 0.45FU 63.21561 -145.96478 06-22-06 <.01 .22 ND 3.8

MH13 06AK13-.45FU dup. 0.45FU 63.21561 -145.96478 06-22-06 <.01 .2 ND 3.81

MH14 06AK14-.45FU 0.45FU 63.06788 -145.77942 06-22-06 <.01 .13 ND 1.59

MH15 06AK15-.45FU 0.45FU 63.20863 -145.94130 06-23-06 <.01 .29 ND 4.89

MH16 06AK16-.45FU 0.45FU 63.23763 -146.12909 06-23-06 <.01 <.01 ND .41

MH17 06AK17-.45FU 0.45FU 63.27634 -146.27193 06-24-06 <.01 .02 ND .3

MH18 06AK18-.45FU 0.45FU 63.28515 -146.32445 06-24-06 <.01 .07 ND .73

MH19 06AK19-.45FU 0.45FU 63.31868 -146.32762 06-25-06 .01 .07 .14 9.03

MH2 06AK20-.45FU 0.45FU 63.31868 -146.32762 06-25-06 <.01 .23 ND 7.86

06AK20-.45FU repl. 0.45FU 63.22520 -145.93295 06-25-06 <.01 .1 ND 7.38

06AK20-.45FU repl., dup. 0.45FU 63.22520 -145.93295 06-25-06 <.01 .08 ND 7.74

MH21 06AK06LG-.45FU-str 0.45FU 63.07365 -145.74760 06-20-06 <.01 .05 ND .4

MH22 06AK07LG-.45FU-str 0.45FU 63.09626 -145.75070 06-20-06 .01 .05 ND 2.18

MH23 06AK08LG-.45FU-str 0.45FU 63.22570 -146.05507 06-21-06 <.01 .08 ND 3.05

MH24 06AK09LG-.45FU-str 0.45FU 63.22648 -146.18576 06-21-06 <.01 .07 ND .6

MH25 06AK10LG-.45FU-str 0.45FU 63.05607 -145.87636 06-22-06 <.01 .16 ND 2.11

MH26 06AK11LG-.45FU-str 0.45FU 63.05607 -145.87636 06-22-06 <.01 .51 ND 12.14

MH27 06AK12LG-.45FU-str 0.45FU 63.22106 -145.91483 06-23-06 <.01 .13 <.01 .81

MH27 06AK12LG-.45FU-str, dup. 0.45FU 63.27527 -146.27946 06-23-06 <.01 .11 ND .78

MH28 06AK13LG-.45FU-str 0.45FU 63.27890 -146.31895 06-24-06 <.01 .22 ND 1.2

MH29 06AK14LG-.45FU-str 0.45FU 63.33512 -146.33614 06-25-06 <.01 .16 .14 26.2

MH30 06AK15LG-.45FU-str 0.45FU 63.29633 -146.30942 06-25-06 <.01 .05 <.01 14

BLANK-OCALA-.45FU 0.45FU – – 06-23-06 <.01 .11 ND ND

BLANK-RICH-.45FU 0.45FU – – 06-23-06 <.01 .36 ND .1
38 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska

Table 7. Map, laboratory, and field numbers, site latitude and longitude, and alkalinity reported as calcium 

carbonate of unfiltered and filtered unacidified surface water samples, Tangle Lakes District, Alaska. 

[Map Nos. are shown in figure 3. Surface water carbonate concentration determined by fixed-endpoint-titration. RU, unfiltered, 

unacidified; 0.45FU, passed through 0.45-μm filter, unacidified. Abbreviations: °N, degrees North, °W, degrees West; repl., field 

replicated; CaCO3, calcium carbonate; mg/L, milligram per liter]

Map No. Laboratory No. Field 

No.

Filter and 

treatment

Latitude

(°N)

Longitude

(°W)

Date 

collected

CaCO3

(mg/L)

Unfiltered, unacidified

MH17 C-285520 06AK17-RU RU 63.27634 -146.27193 06-25-06 24.7

MH18 C-285521 06AK18-RU RU 63.28515 -146.32445 06-25-06 12.1

MH19 C-285522 06AK19-RU RU 63.31868 -146.32762 06-25-06 35.7

MH20 C-285523 06AK20-RU RU 63.22520 -145.93295 06-25-06 56.4

C-285524 06AK20-RU repl. RU 63.22520 -145.93295 06-25-06 55.3

MH21 C-285525 06AK06LG-RU RU 63.07365 -145.74760 06-21-06 25.3

MH22 C-285526 06AK07LG-RU RU 63.09626 -145.75070 06-21-06 53.8

MH23 C-285527 06AK08LG-RU RU 63.22570 -146.05507 06-22-06 72.3

MH24 C-285528 06AK09LG-RU RU 63.22648 -146.18576 06-22-06 5.40

MH25 C-285529 06AK10LG-RU RU 63.05607 -145.87636 06-23-06 60.0

MH26 C-285530 06AK11LG-RU RU 63.22106 -145.91483 06-24-06 58.7

MH27 C-285531 06AK12LG-RU RU 63.27527 -146.27946 06-25-06 30.6

MH28 C-285532 06AK13LG-RU RU 63.27890 -146.31895 06-25-06 23.4

MH29 C-285533 06AK14LG-RU RU 63.33512 -146.33614 06-25-06 46.2

MH30 C-285534 06AK15LG-RU RU 63.29633 -146.30942 06-25-06 14.7

Filtered (0.45 μm), unacidified

MH1 C-285569 06AK01-.45FU 0.45FU 63.32227 -146.04453 06-21-06 89.0

MH2 C-285570 06AK02-.45FU 0.45FU 63.30497 -146.01581 06-21-06 13.7

MH3 C-285571 06AK03-.45FU 0.45FU 63.30404 -146.04607 06-21-06 13.9

MH4 C-285572 06AK04-.45FU 0.45FU 63.30370 -146.04990 06-21-06 30.1

MH5 C-285573 06AK05-.45FU 0.45FU 63.30473 -146.05590 06-21-06 38.2

MH6 C-285574 06AK006-.45FU 0.45FU 63.29038 -146.04857 06-21-06 30.7

MH7 C-285575 06AK07-.45FU 0.45FU 63.24325 -146.06044 06-22-06 112

C-285576 06AK07-.45FU repl. 0.45FU 63.24325 -146.06044 06-22-06 105

MH8 C-285577 06AK08-.45FU 0.45FU 63.24343 -146.06023 06-22-06 109.1

MH9 C-285578 06AK09-.45FU 0.45FU 63.23375 -146.07518 06-22-06 18.2

MH10 C-285579 06AK10-.45FU 0.45FU 63.23109 -146.02482 06-22-06 30.6

MH11 C-285580 06AK11-.45FU 0.45FU 63.25372 -146.17209 06-22-06 21.5

MH12 C-285581 06AK12-.45FU 0.45FU 63.26160 -146.19040 06-22-06 30.0

MH13 C-285582 06AK13-.45FU 0.45FU 63.21561 -145.96478 06-23-06 77.6

MH14 C-285583 06AK14-.45FU 0.45FU 63.06788 -145.77942 06-23-06 15.5

MH15 C-285586 06AK15-.45FU 0.45FU 63.20863 -145.94130 06-24-06 44.3

MH16 C-285587 06AK106-.45FU 0.45FU 63.23763 -146.12909 06-24-06 12.1

MH17 C-285588 06AK17-.45FU 0.45FU 63.27634 -146.27193 06-25-06 25.0

MH18 C-285589 06AK18-.45FU 0.45FU 63.28515 -146.32445 06-25-06 12.2

MH19 C-285590 06AK19-.45FU 0.45FU 63.31868 -146.32762 06-25-06 29.8

MH20 C-285591 06AK20-.45FU 0.45FU 63.22520 -145.93295 06-25-06 54.8

C-285592 06AK20-.45FU repl. 0.45FU 63.22520 -145.93295 06-25-06 56.5
Table 8 39 Table 8. Map and field numbers, site latitude and longitude, location descriptions, and chemistry of composited stream-sediment samples, Tangle Lakes District, Alaska. [Map Nos. are shown in figure 3. Au, Pd, and Pt determined by flame-assay direct-current plasma (FA-DCP) and Hg determined by old-vapor atomic-absorption spectroscopy (CV-AAS). All other elements were determined by inductively coupled plasma-mass spectrometry (ICP-MS). Abbreviations: °N, degrees North; °W, degrees West; ppb, part per billion; ppm, part per million; ft, foot; mi, mile; <, less than] Map No. Field No. Latitude (°N) Longitude (°W) Date collected Location description FA-ICPMS CV-AA ICP-MS Au (ppb) Pd (ppb) Pt (ppb) Hg (ppm) Ag (ppm) Al (ppm) As (ppm) MH1 06GL078SS 63.32312 -146.04228 06-21-06 Upper W Specimen Cr. at 4,738 ft elevation. 7 5 6.9 0.08 0.34 81,400 33.1 MH2 06GL079SS 63.30545 -146.01343 06-21-06 Upper E Specimen Cr. at 4,217 ft elevation. 2 6 8.6 .03 .064 60,300 4.3 MH3 06GL080SS 63.30453 -146.04385 06-21-06 Upper E Specimen Cr. at 3,868 ft elevation. 2 6 9.8 .07 .051 62,500 3.1 MH4 06GL081SS 63.30515 -146.04347 06-21-06 Upper W Specimen Cr. at 3,871 ft elevation. 290 8 10.9 2.2 1.46 60,300 33 06GL081SD 63.30515 -146.04347 06-21-06 Upper W Specimen Cr. at 3,871 ft elevation. 10 7 10 5.3 .105 51,900 31.9 MH6 06GL082SS 63.29040 -146.04565 06-21-06 Specimen Cr. at 3,586 ft elevation. 37 8 10 .39 .475 50,500 23.1 MH7 06GL083SS 63.24371 -146.05809 06-22-06 Stream N side Wild VABM at 3,602 ft elevation. 12 8 20 18 .162 27,000 1,160 06GL084SS 63.23421 -146.07301 06-22-06 Stream W side Wild VABM at 3,983 ft elevation. 6 11 7.8 .24 .076 48,800 55.8 MH9 06GL085SS 63.23159 -146.02222 06-22-06 Stream E side Wild VABM at 3,442 ft elevation. 5 21 15.1 .34 .085 36,400 22.6 MH10 06GL086SS 63.25433 -146.16962 06-22-06 Stream NE side knob 3 mi W of Wild VABM at 3,845 ft elevation. 2 11 9.7 .12 .061 50,000 25.7 MH11 06GL087SS 63.26217 -146.18781 06-22-06 S tributary Eureka Cr. enters at 3250 ft; taken at 3,668 ft elevation. 4 7 6.4 .03 .07 57,100 29.3 MH12 06GL088SS 63.21600 -145.96277 06-23-06 Stream SW side knob E of Fish L at 3,455 ft elevation. 7 18 25.2 .06 .07 20,700 7.3 MH13 06GL089SS 63.06786 -145.77934 06-23-06 Stream E of 14-mile L at 3,622 ft elevation. 8 4 5.1 <.02 .049 67,900 10.2 MH14 06GL090SS 63.20904 -145.93913 06-24-06 Stream S side knob E of Fish L at 3,428 ft elevation. 3 16 33.7 .02 .035 11,500 4 MH15 06GL091SS 63.23813 -146.12677 06-24-06 Stream E side knob w/4440 ft. pond at 3,743 ft elevation. 6 42 32.7 .13 .094 65,400 17.8 MH16 06GL092SS 63.27601 -146.27095 06-25-06 N tributary of N tributary of Eureka Cr. at 3,510 ft elevation. 6 49 35.5 .21 .17 49,800 46 MH17 06GL093SS 63.28561 -146.32222 06-25-06 E tributary upper Eureka Cr. at 3,570 ft elevation. 5 7 6.5 .17 .225 71,900 91.7 MH18 06GL094SS 63.31912 -146.32547 06-25-06 E tributary upper Eureka Cr. at 4,350 ft elevation. 13 5 6 .2 .111 74,600 134 MH19 06GL095SS 63.22569 -145.93065 06-25-06 Stream N side knob E of Fish L at 3,301 ft elevation. 430 16 23.2 .74 .109 29,800 24.6 MH20 06GL095SD 63.22569 -145.93065 06-25-06 Stream N side knob E of Fish L at 3,301 ft elevation. 7 15 17.9 .03 .084 23,400 21.2 MH28 06AK-13LG 63.27890 -146.31895 06-25-06 E tributary upper Eureka Cr. at 3,490 ft elevation. 5 11 6.9 .18 .146 57,300 173 MH29 06AK-14LG 63.33512 -146.33612 06-25-06 E tributary upper Eureka Cr. at 4,550 ft elevation. 8 8 9.8 .27 .069 57,200 17.9
40 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska Table 8. Map and field numbers, site latitude and longitude, location descriptions, and chemistry of composited stream-sediment samples, Tangle Lakes District, Alaska.— Continued [Map Nos. are shown in figure 3. Au, Pd, and Pt determined by flame-assay direct-current plasma (FA-DCP) and Hg determined by old-vapor atomic-absorption spectroscopy (CV-AAS). All other elements were determined by inductively coupled plasma-mass spectrometry (ICP-MS). Abbreviations: °N, degrees North; °W, degrees West; ppb, part per billion; ppm, part per million; ft, foot; mi, mile; <, less than] Map No. Field No. Latitude (°N) Longitude (°W) Date collected Location description ICP-MS Ba (ppm) Be (ppm) Bi (ppm) Ca (ppm) Cd (ppm) Ce (ppm) Co (ppm) MH1 06GL078SS 63.32312 -146.04228 06-21-06 Upper W Specimen Cr. at 4,738 ft elevation. 890 0.86 < 0.06 20,600 0.19 31.4 35.2 MH2 06GL079SS 63.30545 -146.01343 06-21-06 Upper E Specimen Cr. at 4,217 ft elevation. 191 .56 < .06 67,500 .12 21.7 56 MH3 06GL080SS 63.30453 -146.04385 06-21-06 Upper E Specimen Cr. at 3,868 ft elevation. 185 .59 < .06 62,400 .08 22.1 56.8 MH4 06GL081SS 63.30515 -146.04347 06-21-06 Upper W Specimen Cr. at 3,871 ft elevation. 313 .97 < .06 52,200 .59 48.5 118 06GL081SD 63.30515 -146.04347 06-21-06 Upper W Specimen Cr. at 3,871 ft elevation. 254 .88 < .06 51,400 .57 46.8 127 MH6 06GL082SS 63.29040 -146.04565 06-21-06 Specimen Cr. at 3,586 ft elevation. 274 .66 < .06 44,700 .65 33 63.2 MH7 06GL083SS 63.24371 -146.05809 06-22-06 Stream N side Wild VABM at 3,602 ft elevation. 352 1 .08 10,200 .17 27.4 188 06GL084SS 63.23421 -146.07301 06-22-06 Stream W side Wild VABM at 3,983 ft elevation. 309 .61 < .06 46,300 .37 22.9 75.8 MH9 06GL085SS 63.23159 -146.02222 06-22-06 Stream E side Wild VABM at 3,442 ft elevation. 155 .37 < .06 40,100 .28 12.2 89.6 MH10 06GL086SS 63.25433 -146.16962 06-22-06 Stream NE side knob 3 mi W of Wild VABM at 3,845 ft elevation. 244 .59 < .06 40,500 .2 22.1 56.1 MH11 06GL087SS 63.26217 -146.18781 06-22-06 S tributary Eureka Cr. enters at 3250 ft.; taken at 3,668 ft elevation. 306 .9 .06 39,900 .22 32.3 39.1 MH12 06GL088SS 63.21600 -145.96277 06-23-06 Stream SW side knob E of Fish L at 3,455 ft elevation. 134 .32 < .06 14,500 .17 10.5 123 MH13 06GL089SS 63.06786 -145.77934 06-23-06 Stream E of 14-mile L at 3,622 ft elevation. 441 .9 .09 28,900 .15 32.9 33.8 MH14 06GL090SS 63.20904 -145.93913 06-24-06 Stream S side knob E of Fish L at 3,428 ft elevation. 61.2 .14 < .06 11,400 .12 5 163 MH15 06GL091SS 63.23813 -146.12677 06-24-06 Stream E side knob w/4440 ft. pond at 3,743 ft elevation. 391 .82 .07 40,800 .26 30.6 48.4 MH16 06GL092SS 63.27601 -146.27095 06-25-06 N tributary of N tributary of Eureka Cr. at 3,510 ft elevation. 452 .64 .08 16,900 .39 18.7 114 MH17 06GL093SS 63.28561 -146.32222 06-25-06 E tributary upper Eureka Cr. at 3,570 ft elevation. 562 1 .16 25,800 .27 33.1 45.6 MH18 06GL094SS 63.31912 -146.32547 06-25-06 E tributary upper Eureka Cr. at 4,350 ft elevation. 680 .98 .15 31,900 .23 27.5 34.6 MH19 06GL095SS 63.22569 -145.93065 06-25-06 Stream N side knob E of Fish L at 3,301 ft elevation. 158 .38 < .06 24,100 .13 12.2 113 MH20 06GL095SD 63.22569 -145.93065 06-25-06 Stream N side knob E of Fish L at 3,301 ft elevation. 123 .28 < .06 18,900 .1 11.3 84.7 MH28 06AK-13LG 63.27890 -146.31895 06-25-06 E tributary upper Eureka Cr. at 3,490 ft elevation. 529 .84 .12 26,000 .29 27.6 86.5 MH29 06AK-14LG 63.33512 -146.33612 06-25-06 E tributary upper Eureka Cr. at 4,550 ft elevation. 404 .6 < .06 44,600 .21 20.6 51.9
Table 8 41 Table 8. Map and field numbers, site latitude and longitude, location descriptions, and chemistry of composited stream-sediment samples, Tangle Lakes District, Alaska.— Continued [Map Nos. are shown in figure 3. Au, Pd, and Pt determined by flame-assay direct-current plasma (FA-DCP) and Hg determined by old-vapor atomic-absorption spectroscopy (CV-AAS). All other elements were determined by inductively coupled plasma-mass spectrometry (ICP-MS). Abbreviations: °N, degrees North; °W, degrees West; ppb, part per billion; ppm, part per million; ft, foot; mi, mile; <, less than] Map No. Field No. Latitude (°N) Longitude (°W) Date collected Location description ICP-MS Cr (ppm) Cs (ppm) Cu (ppm) Fe (ppm) Ga (ppm) K (ppm) La (ppm) MH1 06GL078SS 63.32312 -146.04228 06-21-06 Upper W Specimen Cr. at 4,738 ft elevation. 346 2.1 113 66,000 15.7 17,600 15.7 MH2 06GL079SS 63.30545 -146.01343 06-21-06 Upper E Specimen Cr. at 4,217 ft elevation. 1,000 .35 108 78,600 14.2 2,430 10.8 MH3 06GL080SS 63.30453 -146.04385 06-21-06 Upper E Specimen Cr. at 3,868 ft elevation. 966 .26 105 79,700 14.8 2,560 10.6 MH4 06GL081SS 63.30515 -146.04347 06-21-06 Upper W Specimen Cr. at 3,871 ft elevation. 1,640 .95 1,260 89,400 14.3 3,030 27.1 06GL081SD 63.30515 -146.04347 06-21-06 Upper W Specimen Cr. at 3,871 ft elevation. 1,680 .84 1,320 89,100 15.4 2,840 25.2 MH6 06GL082SS 63.29040 -146.04565 06-21-06 Specimen Cr. at 3,586 ft elevation. 1,650 .9 214 77,100 14 3,410 17.4 MH7 06GL083SS 63.24371 -146.05809 06-22-06 Stream N side Wild VABM at 3,602 ft elevation. 7,660 22.9 368 198,000 9.2 7,440 14.2 06GL084SS 63.23421 -146.07301 06-22-06 Stream W side Wild VABM at 3,983 ft elevation. 954 2.5 80.7 106,000 13 3,210 10.8 MH9 06GL085SS 63.23159 -146.02222 06-22-06 Stream E side Wild VABM at 3,442 ft elevation. 2,140 5.2 147 95,500 10.3 2,000 5.6 MH10 06GL086SS 63.25433 -146.16962 06-22-06 Stream NE side knob 3 mi W of Wild VABM at 3,845 ft elevation. 1,280 2.2 90.4 82,000 14.2 3,230 10.4 MH11 06GL087SS 63.26217 -146.18781 06-22-06 S tributary Eureka Cr. enters at 3250 ft.; taken at 3,668 ft elevation. 472 2.2 72.9 65,700 14.9 4,460 15.6 MH12 06GL088SS 63.21600 -145.96277 06-23-06 Stream SW side knob E of Fish L at 3,455 ft elevation. 4,220 .82 128 114,000 6.2 1,930 5 MH13 06GL089SS 63.06786 -145.77934 06-23-06 Stream E of 14-mile L at 3,622 ft elevation. 378 1.2 63.6 53,600 15.4 6,760 16.1 MH14 06GL090SS 63.20904 -145.93913 06-24-06 Stream S side knob E of Fish L at 3,428 ft elevation. 1,460 .2 120 131,000 2.9 770 2.3 MH15 06GL091SS 63.23813 -146.12677 06-24-06 Stream E side knob w/4440 ft. pond at 3,743 ft elevation. 1,100 3.3 81 78,200 16.6 5,020 14.9 MH16 06GL092SS 63.27601 -146.27095 06-25-06 N tributary of N tributary of Eureka Cr. at 3,510 ft elevation. 684 5.1 137 160,000 11.5 5,160 9.2 MH17 06GL093SS 63.28561 -146.32222 06-25-06 E tributary upper Eureka Cr. at 3,570 ft elevation. 654 6.7 154 57,400 15 9,360 17.3 MH18 06GL094SS 63.31912 -146.32547 06-25-06 E tributary upper Eureka Cr. at 4,350 ft elevation. 2,260 3.1 85.6 59,000 15 11,700 14.7 MH19 06GL095SS 63.22569 -145.93065 06-25-06 Stream N side knob E of Fish L at 3,301 ft elevation. 2,990 .88 200 107,000 7.4 2,580 5.7 MH20 06GL095SD 63.22569 -145.93065 06-25-06 Stream N side knob E of Fish L at 3,301 ft elevation. 2,220 .7 153 81,100 5.9 2,010 5.6 MH28 06AK-13LG 63.27890 -146.31895 06-25-06 E tributary upper Eureka Cr. at 3,490 ft elevation. 966 3.4 89.2 73,200 12.3 7,890 14.3 MH29 06AK-14LG 63.33512 -146.33612 06-25-06 E tributary upper Eureka Cr. at 4,550 ft elevation. 1,840 .45 69.4 68,200 12 5,080 10.8
42 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska Table 8. Map and field numbers, site latitude and longitude, location descriptions, and chemistry of composited stream-sediment samples, Tangle Lakes District, Alaska.— Continued [Map Nos. are shown in figure 3. Au, Pd, and Pt determined by flame-assay direct-current plasma (FA-DCP) and Hg determined by old-vapor atomic-absorption spectroscopy (CV-AAS). All other elements were determined by inductively coupled plasma-mass spectrometry (ICP-MS). Abbreviations: °N, degrees North; °W, degrees West; ppb, part per billion; ppm, part per million; ft, foot; mi, mile; <, less than] Map No. Field No. Latitude (°N) Longitude (°W) Date collected Location description ICP-MS Li (ppm) Mg (ppm) Mn (ppm) Mo (ppm) Na (ppm) Nb (ppm) Ni (ppm) MH1 06GL078SS 63.32312 -146.04228 06-21-06 Upper W Specimen Cr. at 4,738 ft elevation. 17.8 32,300 1,140 0.26 19,000 7.9 141 MH2 06GL079SS 63.30545 -146.01343 06-21-06 Upper E Specimen Cr. at 4,217 ft elevation. 7.9 66,600 1,230 .25 10,200 7.5 390 MH3 06GL080SS 63.30453 -146.04385 06-21-06 Upper E Specimen Cr. at 3,868 ft elevation. 7.9 65,600 1,250 .2 12,000 8.8 352 MH4 06GL081SS 63.30515 -146.04347 06-21-06 Upper W Specimen Cr. at 3,871 ft elevation. 11.2 59,700 2,350 1 10,700 7.9 620 06GL081SD 63.30515 -146.04347 06-21-06 Upper W Specimen Cr. at 3,871 ft elevation. 9.4 49,500 2,340 .73 8,210 12 616 MH6 06GL082SS 63.29040 -146.04565 06-21-06 Specimen Cr. at 3,586 ft elevation. 10.6 45,000 1,240 .46 8,860 10 391 MH7 06GL083SS 63.24371 -146.05809 06-22-06 Stream N side Wild VABM at 3,602 ft elevation. 20.1 40,900 2,340 .38 8,210 4.4 1,120 06GL084SS 63.23421 -146.07301 06-22-06 Stream W side Wild VABM at 3,983 ft elevation. 15.6 33,800 2,860 .21 8,910 5.4 357 MH9 06GL085SS 63.23159 -146.02222 06-22-06 Stream E side Wild VABM at 3,442 ft elevation. 15 80,000 1,540 .26 5,880 4.1 715 MH10 06GL086SS 63.25433 -146.16962 06-22-06 Stream NE side knob 3 mi W of Wild VABM at 3,845 ft elevation. 13.6 39,700 1,200 .2 9,260 10 316 MH11 06GL087SS 63.26217 -146.18781 06-22-06 S tributary Eureka Cr. enters at 3250 ft.; taken at 3,668 ft elevation. 15.8 28,700 1,370 .41 11,300 9.7 213 MH12 06GL088SS 63.21600 -145.96277 06-23-06 Stream SW side knob E of Fish L at 3,455 ft elevation. 13.4 116,000 1,680 .27 3,320 1.7 1,150 MH13 06GL089SS 63.06786 -145.77934 06-23-06 Stream E of 14-mile L at 3,622 ft elevation. 19 23,000 912 .41 13,400 10 191 MH14 06GL090SS 63.20904 -145.93913 06-24-06 Stream S side knob E of Fish L at 3,428 ft elevation. 8.3 178,000 2,020 .1 2,020 .42 972 MH15 06GL091SS 63.23813 -146.12677 06-24-06 Stream E side knob w/4440 ft. pond at 3,743 ft elevation. 19.2 34,900 1,620 .57 10,600 13 253 MH16 06GL092SS 63.27601 -146.27095 06-25-06 N tributary of N tributary of Eureka Cr. at 3,510 ft elevation. 17.1 18,200 3,650 1 9,060 6 765 MH17 06GL093SS 63.28561 -146.32222 06-25-06 E tributary upper Eureka Cr. at 3,570 ft elevation. 28.9 28,700 1,260 1.6 14,300 10 372 MH18 06GL094SS 63.31912 -146.32547 06-25-06 E tributary upper Eureka Cr. at 4,350 ft elevation. 15.6 25,100 1,160 .54 20,300 5.7 231 MH19 06GL095SS 63.22569 -145.93065 06-25-06 Stream N side knob E of Fish L at 3,301 ft elevation. 12.3 123,000 1,510 .23 5,330 2.3 1,020 MH20 06GL095SD 63.22569 -145.93065 06-25-06 Stream N side knob E of Fish L at 3,301 ft elevation. 9.3 92,500 1,140 .2 4,080 2.5 761 MH28 06AK-13LG 63.27890 -146.31895 06-25-06 E tributary upper Eureka Cr. at 3,490 ft elevation. 21.2 21,800 3,890 1.7 14,000 6.6 514 MH29 06AK-14LG 63.33512 -146.33612 06-25-06 E tributary upper Eureka Cr. at 4,550 ft elevation. 13.1 56,800 1,130 .4 12,500 4 533
Table 8 43 Table 8. Map and field numbers, site latitude and longitude, location descriptions, and chemistry of composited stream-sediment samples, Tangle Lakes District, Alaska.— Continued [Map Nos. are shown in figure 3. Au, Pd, and Pt determined by flame-assay direct-current plasma (FA-DCP) and Hg determined by old-vapor atomic-absorption spectroscopy (CV-AAS). All other elements were determined by inductively coupled plasma-mass spectrometry (ICP-MS). Abbreviations: °N, degrees North; °W, degrees West; ppb, part per billion; ppm, part per million; ft, foot; mi, mile; <, less than] Map No. Field No. Latitude (°N) Longitude (°W) Date collected Location description ICP-MS P (ppm) Pb (ppm) Rb (ppm) Sb (ppm) Sc (ppm) Sr (ppm) Th (ppm) MH1 06GL078SS 63.32312 -146.04228 06-21-06 Upper W Specimen Cr. at 4,738 ft elevation. 749 9.67 59.7 6.3 24.8 197 3.01 MH2 06GL079SS 63.30545 -146.01343 06-21-06 Upper E Specimen Cr. at 4,217 ft elevation. 498 2.54 6.8 .41 29.4 217 1.43 MH3 06GL080SS 63.30453 -146.04385 06-21-06 Upper E Specimen Cr. at 3,868 ft elevation. 541 1.5 6.7 .34 31.9 181 1.31 MH4 06GL081SS 63.30515 -146.04347 06-21-06 Upper W Specimen Cr. at 3,871 ft elevation. 496 3.44 8.8 1.9 27.3 237 2.71 06GL081SD 63.30515 -146.04347 06-21-06 Upper W Specimen Cr. at 3,871 ft elevation. 436 3.2 9.2 1.8 26.5 257 1.62 MH6 06GL082SS 63.29040 -146.04565 06-21-06 Specimen Cr. at 3,586 ft elevation. 439 4.29 11.6 1.8 24 241 2.52 MH7 06GL083SS 63.24371 -146.05809 06-22-06 Stream N side Wild VABM at 3,602 ft elevation. 242 3.56 31.9 13.2 13.8 85.9 4.34 06GL084SS 63.23421 -146.07301 06-22-06 Stream W side Wild VABM at 3,983 ft elevation. 429 4.74 11.8 .88 24.8 219 1.9 MH9 06GL085SS 63.23159 -146.02222 06-22-06 Stream E side Wild VABM at 3,442 ft elevation. 241 3.2 8.2 .59 24.5 162 .89 MH10 06GL086SS 63.25433 -146.16962 06-22-06 Stream NE side knob 3 mi W of Wild VABM at 3,845 ft elevation. 462 4.44 11.7 .6 24.2 221 1.52 MH11 06GL087SS 63.26217 -146.18781 06-22-06 S tributary Eureka Cr. enters at 3250 ft.; taken at 3,668 ft elevation. 586 6.35 16.4 .61 23.3 244 2.89 MH12 06GL088SS 63.21600 -145.96277 06-23-06 Stream SW side knob E of Fish L at 3,455 ft elevation. 377 3.41 9.3 .2 12.4 103 1.07 MH13 06GL089SS 63.06786 -145.77934 06-23-06 Stream E of 14-mile L at 3,622 ft elevation. 667 6.98 25.1 .82 22.2 253 3.54 MH14 06GL090SS 63.20904 -145.93913 06-24-06 Stream S side knob E of Fish L at 3,428 ft elevation. 155 1.85 3 .2 11.4 43.5 .39 MH15 06GL091SS 63.23813 -146.12677 06-24-06 Stream E side knob w/4440 ft. pond at 3,743 ft elevation. 850 7.04 17.7 .73 27 253 2.82 MH16 06GL092SS 63.27601 -146.27095 06-25-06 N tributary of N tributary of Eureka Cr. at 3,510 ft elevation. 1,200 5.56 15.7 1.6 19.6 183 1.91 MH17 06GL093SS 63.28561 -146.32222 06-25-06 E tributary upper Eureka Cr. at 3,570 ft elevation. 1,080 9.08 27.5 2.2 20 308 3.71 MH18 06GL094SS 63.31912 -146.32547 06-25-06 E tributary upper Eureka Cr. at 4,350 ft elevation. 464 7.8 35.9 3.6 19.7 277 3.38 MH19 06GL095SS 63.22569 -145.93065 06-25-06 Stream N side knob E of Fish L at 3,301 ft elevation. 297 2.82 8.9 .98 17.6 112 1.09 MH20 06GL095SD 63.22569 -145.93065 06-25-06 Stream N side knob E of Fish L at 3,301 ft elevation. 233 2.22 7.1 .82 13.5 88.8 .99 MH28 06AK-13LG 63.27890 -146.31895 06-25-06 E tributary upper Eureka Cr. at 3,490 ft elevation. 1,140 8.87 26.4 1.8 17.7 259 3.83 MH29 06AK-14LG 63.33512 -146.33612 06-25-06 E tributary upper Eureka Cr. at 4,550 ft elevation. 328 3.92 14.4 3.3 24.4 249 1.96
44 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska Table 8. Map and field numbers, site latitude and longitude, location descriptions, and chemistry of composited stream-sediment samples, Tangle Lakes District, Alaska.— Continued [Map Nos. are shown in figure 3. Au, Pd, and Pt determined by flame-assay direct-current plasma (FA-DCP) and Hg determined by old-vapor atomic-absorption spectroscopy (CV-AAS). All other elements were determined by inductively coupled plasma-mass spectrometry (ICP-MS). Abbreviations: °N, degrees North; °W, degrees West; ppb, part per billion; ppm, part per million; ft, foot; mi, mile; <, less than] Map No. Field No. Latitude (°N) Longitude (°W) Date collected Location description ICP-MS Ti (ppm) Tl (ppm)

U

(ppm)

V

(ppm)

Y

(ppm)

Zn

(ppm)

MH1 06GL078SS 63.32312 -146.04228 06-21-06 Upper W Specimen Cr. at 4,738 ft elevation. 5,230 0.66 1.52 191 24.6 95.1MH2 06GL079SS 63.30545 -146.01343 06-21-06 Upper E Specimen Cr. at 4,217 ft elevation. 6,290 .08 .6 228 20.5 83MH3 06GL080SS 63.30453 -146.04385 06-21-06 Upper E Specimen Cr. at 3,868 ft elevation. 6,950 <.08 .54 252 21.9 79.8MH4 06GL081SS 63.30515 -146.04347 06-21-06 Upper W Specimen Cr. at 3,871 ft elevation. 6,510 .12 .79 218 95.5 158

06GL081SD 63.30515 -146.04347 06-21-06 Upper W Specimen Cr. at 3,871 ft elevation. 6,820 .12 .76 214 101 169

MH6 06GL082SS 63.29040 -146.04565 06-21-06 Specimen Cr. at 3,586 ft elevation. 6,510 .13 .96 192 30.1 145MH7 06GL083SS 63.24371 -146.05809 06-22-06 Stream N side Wild VABM at 3,602 ft elevation. 3,430 .16 1.22 17.3 13.4 188

06GL084SS 63.23421 -146.07301 06-22-06 Stream W side Wild VABM at 3,983 ft elevation. 6,400 .11 .61 196 20.7 101

MH9 06GL085SS 63.23159 -146.02222 06-22-06 Stream E side Wild VABM at 3,442 ft elevation. 5,010 <.08 .39 138 15.4 112MH10 06GL086SS 63.25433 -146.16962 06-22-06 Stream NE side knob 3 mi W of Wild VABM at 

3,845 ft elevation.

7,300 .1 .56 223 20.4 115

MH11 06GL087SS 63.26217 -146.18781 06-22-06 S tributary Eureka Cr. enters at 3,250 ft; taken at 

3,668 ft elevation.

7,820 .12 .88 221 21.7 98

MH12 06GL088SS 63.21600 -145.96277 06-23-06 Stream SW side knob E of Fish L at 3,455 ft 

elevation.

2,300 <.08 .4 62.2 8 124

MH13 06GL089SS 63.06786 -145.77934 06-23-06 Stream E of 14-mile L at 3,622 ft elevation. 5,810 .2 1.17 182 18.2 76.7MH14 06GL090SS 63.20904 -145.93913 06-24-06 Stream S side knob E of Fish L at 3,428 ft elevation. 1,390 <.08 .13 60.8 4 111MH15 06GL091SS 63.23813 -146.12677 06-24-06 Stream E side knob w/4440 ft. pond at 3,743 ft 

elevation.

9,640 .15 .94 252 23.3 124

MH16 06GL092SS 63.27601 -146.27095 06-25-06 N tributary of N tributary of Eureka Cr. at 3,510 ft 

elevation.

4,360 .2 1.12 151 16 134

MH17 06GL093SS 63.28561 -146.32222 06-25-06 E tributary upper Eureka Cr. at 3,570 ft elevation. 6,030 .23 6.48 153 22.9 109MH18 06GL094SS 63.31912 -146.32547 06-25-06 E tributary upper Eureka Cr. at 4,350 ft elevation. 4,480 .23 1.9 134 21.2 94.4MH19 06GL095SS 63.22569 -145.93065 06-25-06 Stream N side knob E of Fish L at 3,301 ft elevation. 3,600 .08 .44 94.6 10.6 100MH20 06GL095SD 63.22569 -145.93065 06-25-06 Stream N side knob E of Fish L at 3,301 ft elevation. 3,040 <.08 .34 69.5 8.1 75.3MH28 06AK-13LG 63.27890 -146.31895 06-25-06 E tributary upper Eureka Cr. at 3,490 ft elevation. 4,230 .28 6.54 152 18.4 90.8

MH29 06AK-14LG 63.33512 -146.33612 06-25-06 E tributary upper Eureka Cr. at 4,550 ft elevation. 3,810 .13 1.13 122 16.2 78.4
Table 9 45

Table 9. Map and field numbers, site latitude and longitude, location descriptions, and mineralogy of panned-concentrate samples of 

stream-sediments, Tangle Lakes District, Alaska.

[Map Nos. are shown on figure 3. Mineralogy determined by visual identification in the field. Confirmed using microscopic examination of concentrates. 

Abbreviations: °N, degrees North; °W, degrees west; ft, foot; mi, mile; %, percent]

Map 

No.

Field

No.

Latitude

(°N)

Longitude

(°W)

Local 

description Mineralogy

MH1 06GL078SC 63.32312 -146.04228 Upper W Specimen Cr. at 4,738 ft elevation 1 tiny well-crystalized gold grain; sparse 

oxidized pyrite (0.1%); trace barite; yellow 

monazite; trace cinnabar.

MH2 06GL079SC 63.30545 -146.01343 Upper E Specimen Cr. at 4,217 ft elevation Trace oxidized pyrite; trace brilliant red 

cinnabar.

MH3 06GL080SC 63.30453 -146.04385 Upper E Specimen Cr. at 3,868 ft elevation 1 possible tiny gold grain (?) seen in field; 

sparse oxidized pyrite (0.1%).

MH4 06GL081SC 63.30515 -146.04347 Upper W Specimen Cr. at 3,871 ft elevation Gold grain (?) seen in field; sparse 

scheelite; 1% oxidized pyrite; barite; 22 

grains bright red cinnabar; manganese 

oxide in orbicular form.

MH6 06GL082SC 63.29040 -146.04565 Specimen Cr. at 3,586 ft elevation Copper silicates; barite; bright red 

cinnabar.

MH7 06GL083SC 63.24371 -146.05809 Stream N side Wild VABM at 3,602 ft elevation Oxidized pyrite; notable amounts of red to 

purplish cinnabar and metacinnabar.

MH9 06GL084SC 63.23421 -146.07301 Stream W side Wild VABM at 3,983 ft elevation Schorl; trace cinnabar.

MH10 06GL085SC 63.23159 -146.02222 Stream E side Wild VABM at 3,442 ft elevation Gold - 1 relatively large, thick, heavy, 

subangular, elongate flake with rough, 

semihackly surface; trace cinnabar.

MH11 06GL086SC 63.25433 -146.16962 Stream NE side knob 3 mi W of Wild VABM at 

3,845 ft elevation

Schorl.

MH12 06GL087SC 63.26217 -146.18781 S tributary Eureka Cr. enters at 3,250 ft; taken at 

3,668 ft elevation

Schorl.

MH13 06GL088SC 63.21600 -145.96277 Stream SW side knob E of Fish Lake at 3,455 ft 

elevation

Cinnabar grain; 1 pyrite grain.

MH14 06GL089SC 63.06786 -145.77934 Stream E of Fourteenmile Lake at 3,622 ft 

elevation

No ore-related minerals seen.

MH15 06GL090SC 63.20904 -145.93913 Stream S side knob E of Fish Lake at 3,428 ft 

elevation

Gold grain seen in field; 1 grain cinnabar; 

1 pyrite grain.

MH16 06GL091SC 63.23813 -146.12677 Stream E side knob w/4,440 ft pond at 3,743 ft 

elevation

1 tiny, jagged gold grain seen in field; 

sparse scheelite.

MH18 06GL093SC 63.28561 -146.32222 E tributary upper Eureka Cr. at 3,570 ft elevation Schorl.

MH19 06GL094SC 63.31912 -146.32547 E tributary upper Eureka Cr. at 4,350 ft elevation Scheelite; 20% oxidized pyrite; barite; 

cinnabar.

MH20 06GL095SC 63.22569 -145.93065 Stream N side knob E of Fish Lake at 3,301 ft 

elevation

1 flattened, rounded, medium-size gold 

flake seen in field; sparse oxidized pyrite.
46 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska Table 10. Map, laboratory, and field numbers, site latitude and longitude, sample descriptions, and chemistry of soils, Tangle Lakes District, Alaska. [Map Nos. are shown in figure 3. All values are in parts per million. Concentration of Hg determined using cold-vapor atomic-absorption spectroscopy (CV-AAS) on a ground sample aliquot. All other elements determined using inductively coupled plasma-mass spectrometry (ICP-MS) on the ground sample. Abbreviations: °N., degrees North; °W., degrees West; <, less than] Map No. Laboratory No. Field No. Latitude (°N) Longitude (°W) Sample description Hg Al As Ba Be Bi Ca MH21 C-283228 06AK06A 63.07368 -145.74762 Organic-rich A horizon; dark brown; silty 0.04 59,600 10 360 0.63 0.07 28,800 MH21 C-283229 06AK06B 63.07368 -145.74762 Reddish-brown B horizon; silty .03 66,000 9.5 400 .66 < .06 29,400 MH21 C-283230 06AK06C 63.07368 -145.74762 Grey C horizon; coarse-sandy .06 68,500 8.3 410 .74 < .06 30,500 MH22 C-283231 06AK07A 63.09644 -145.75018 Dark-brown A horizon; silty; organic; some fine sand .04 70,200 8.0 420 .69 < .06 34,600 MH22 C-283232 06AK07C 63.09644 -145.75018 Coarse gray C horizon sandy-gravely; flood plain .02 73,300 7.5 420 .81 < .06 39,000 MH23 C-283233 06AK08A 63.22575 -146.05510 Dark-brown A horizon; silty; organic-rich .21 66,200 20 410 .86 .11 24,100 MH23 C-283234 06AK08B 63.22575 -146.05510 Red-brown B horizon; silty .29 67,300 23 350 .84 .11 25,300 MH23 C-283235 06AK08C 63.22575 -146.05510 Grayish-brown C horizon; fine sandy .33 63,800 27 300 .61 .12 30,400 MH24 C-283236 06AK09A 63.22578 -146.18777 Dark-brown A horizon; silty .07 66,700 17 600 .9 .17 16,700 MH24 C-283237 06AK09C 63.22578 -146.18777 Gray silty C horizon with few large coarse fragments .07 90,300 20 810 1.0 .14 27,700 MH25 C-283238 06AK10A 63.05629 -145.87428 Silty to fine sandy A horizon; organic-rich .04 74400 7.3 440 .83 < .06 33,500 MH25 C-283239 06AK10B 63.05629 -145.87428 Silty B horizon; gray-brown .04 80,600 8.3 500 .96 < .06 36,100 MH25 C-283240 06AK10C 63.05629 -145.87428 Silty C horizon; gray; very wet; no permafrost .07 83,100 8.9 520 .96 < .06 37,200 Map No. Laboratory No. Field No. Latitude (°N) Longitude (°W) Sample description Cd Ce Co Cr Cs Cu Fe MH21 C-283228 06AK06A 63.07368 -145.74762 Organic-rich A horizon; dark brown; silty 0.19 18 65 982 1.1 100 67,200 MH21 C-283229 06AK06B 63.07368 -145.74762 Reddish-brown B horizon; silty .14 20 61 1,010 1.2 120 68,200 MH21 C-283230 06AK06C 63.07368 -145.74762 Grey C horizon; coarse-sandy .14 23 62 1,020 1.2 120 70,800 MH22 C-283231 06AK07A 63.09644 -145.75018 Dark-brown A horizon; silty; organic; some fine sand .16 23 38 644 .88 68 56,400 MH22 C-283232 06AK07C 63.09644 -145.75018 Coarse gray C horizon sandy-gravely; flood plain .15 28 38 716 .79 68 57,400 MH23 C-283233 06AK08A 63.22575 -146.05510 Dark-brown A horizon; silty; organic-rich .19 23 43 679 2.8 99 65,000 MH23 C-283234 06AK08B 63.22575 -146.05510 Red-brown B horizon; silty .23 24 45 825 3.2 96 80,000 MH23 C-283235 06AK08C 63.22575 -146.05510 Grayish-brown C horizon; fine sandy .24 17 94 1,420 3.0 280 82,500 MH24 C-283236 06AK09A 63.22578 -146.18777 Dark-brown A horizon; silty .30 28 61 135 2.2 61 44,900 MH24 C-283237 06AK09C 63.22578 -146.18777 Gray silty C horizon with few large coarse fragments .23 31 41 274 2.4 110 79,100 MH25 C-283238 06AK10A 63.05629 -145.87428 Silty to fine sandy A horizon; organic-rich .15 22 26 319 1.0 49 51,500 MH25 C-283239 06AK10B 63.05629 -145.87428 Silty B horizon; gray-brown .12 25 30 411 1.1 58 55,000 MH25 C-283240 06AK10C 63.05629 -145.87428 Silty C horizon; gray; very wet; no permafrost .13 29 32 450 1.2 72 58,000
Table 10 47 Table 10. Map, laboratory, and field numbers, site latitude and longitude, sample descriptions, and chemistry of soils, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. All values are in parts per million. Concentration of Hg determined using cold-vapor atomic-absorption spectroscopy (CV-AAS) on a ground sample aliquot. All other elements determined using inductively coupled plasma-mass spectrometry (ICP-MS) on the ground sample. Abbreviations: °N., degrees North; °W., degrees West; <, less than] Map No. Laboratory No. Field No. Latitude (°N) Longitude (°W) Sample description Ga K La Li Mg Mn Mo MH21 C-283228 06AK06A 63.07368 -145.74762 Organic-rich A horizon; dark brown; silty 12 5,240 9.0 15 61,500 1,350 0.27 MH21 C-283229 06AK06B 63.07368 -145.74762 Reddish-brown B horizon; silty 13 5,480 10 17 63,600 1,180 .20 MH21 C-283230 06AK06C 63.07368 -145.74762 Grey C horizon; coarse-sandy 14 5,740 12 17 59,500 1,150 .07 MH22 C-283231 06AK07A 63.09644 -145.75018 Dark-brown A horizon; silty; organic; some fine sand 13 6,540 12 16 46,200 1,110 .24 MH22 C-283232 06AK07C 63.09644 -145.75018 Coarse gray C horizon sandy-gravely; flood plain 14 6,620 15 15 48,100 1,100 .10 MH23 C-283233 06AK08A 63.22575 -146.05510 Dark-brown A horizon; silty; organic-rich 15 7,270 12 25 42,200 1,010 .81 MH23 C-283234 06AK08B 63.22575 -146.05510 Red-brown B horizon; silty 16 5,980 12 26 44,700 1,040 .76 MH23 C-283235 06AK08C 63.22575 -146.05510 Grayish-brown C horizon; fine sandy 12 4,820 8.3 23 78,400 1,440 .20 MH24 C-283236 06AK09A 63.22578 -146.18777 Dark-brown A horizon; silty 15 7,970 13 19 15,100 4,860 8.9 MH24 C-283237 06AK09C 63.22578 -146.18777 Gray silty C horizon with few large coarse fragments 22 7,480 15 22 23,800 2,300 3.0 MH25 C-283238 06AK10A 63.05629 -145.87428 Silty to fine sandy A horizon; organic-rich 14 7,840 12 16 28,100 895 .31 MH25 C-283239 06AK10B 63.05629 -145.87428 Silty B horizon; gray-brown 15 8,520 12 18 30,200 1,050 .27 MH25 C-283240 06AK10C 63.05629 -145.87428 Silty C horizon; gray; very wet; no permafrost 15 9,180 16 20 32,100 1,140 .24 Map No. Laboratory No. Field No. Latitude (°N) Longitude (°W) Sample description Na Nb Ni P Pb Rb Sb MH21 C-283228 06AK06A 63.07368 -145.74762 Organic-rich A horizon; dark brown; silty 13,900 6.1 390 560 4.3 20 0.67 MH21 C-283229 06AK06B 63.07368 -145.74762 Reddish-brown B horizon; silty 16,600 7.3 400 500 4.3 19 .68 MH21 C-283230 06AK06C 63.07368 -145.74762 Grey C horizon; coarse-sandy 17,400 7.1 410 560 4.4 20 .65 MH22 C-283231 06AK07A 63.09644 -145.75018 Dark-brown A horizon; silty; organic; some fine sand 16,800 7.0 240 650 5.2 21 .74 MH22 C-283232 06AK07C 63.09644 -145.75018 Coarse gray C horizon sandy-gravely; flood plain 18,300 7.1 230 650 5.0 20 .71 MH23 C-283233 06AK08A 63.22575 -146.05510 Dark-brown A horizon; silty; organic-rich 13,100 6.9 280 970 12 28 1.6 MH23 C-283234 06AK08B 63.22575 -146.05510 Red-brown B horizon; silty 11,300 8.3 280 590 11 23 1.8 MH23 C-283235 06AK08C 63.22575 -146.05510 Grayish-brown C horizon; fine sandy 11,500 6.0 760 460 9.3 15 2.2 MH24 C-283236 06AK09A 63.22578 -146.18777 Dark-brown A horizon; silty 12,000 7.4 57 2,540 10 27 .72 MH24 C-283237 06AK09C 63.22578 -146.18777 Gray silty C horizon with few large coarse fragments 11,000 13 84 1,790 9.9 28 1.1 MH25 C-283238 06AK10A 63.05629 -145.87428 Silty to fine sandy A horizon; organic-rich 19,000 7.9 120 610 6.1 26 .78 MH25 C-283239 06AK10B 63.05629 -145.87428 Silty B horizon; gray-brown 20,600 7.3 130 540 6.0 26 .84 MH25 C-283240 06AK10C 63.05629 -145.87428 Silty C horizon; gray; very wet; no permafrost 20,600 8.5 150 640 7.2 28 .91
48 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska Table 10. Map, laboratory, and field numbers, site latitude and longitude, sample descriptions, and chemistry of soils, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. All values are in parts per million. Concentration of Hg determined using cold-vapor atomic-absorption spectroscopy (CV-AAS) on a ground sample aliquot. All other elements determined using inductively coupled plasma-mass spectrometry (ICP-MS) on the ground sample. Abbreviations: °N., degrees North; °W., degrees West; <, less than] Map No. Laboratory No. Field No. Latitude (°N) Longitude (°W) Sample description Sc Sr Th Ti Tl MH21 C-283228 06AK06A 63.07368 -145.74762 Organic-rich A horizon; dark brown; silty 23 180 1.9 4,720 0.18 MH21 C-283229 06AK06B 63.07368 -145.74762 Reddish-brown B horizon; silty 25 200 1.9 5,630 .15 MH21 C-283230 06AK06C 63.07368 -145.74762 Grey C horizon; coarse-sandy 27 210 2.2 6,130 .14 MH22 C-283231 06AK07A 63.09644 -145.75018 Dark-brown A horizon; silty; organic; some fine sand 23 240 2.5 4,870 .16 MH22 C-283232 06AK07C 63.09644 -145.75018 Coarse gray C horizon sandy-gravely; flood plain 25 260 2.9 5,210 .16 MH23 C-283233 06AK08A 63.22575 -146.05510 Dark-brown A horizon; silty; organic-rich 19 210 2.9 4,880 .24 MH23 C-283234 06AK08B 63.22575 -146.05510 Red-brown B horizon; silty 22 150 2.8 5,920 .22 MH23 C-283235 06AK08C 63.22575 -146.05510 Grayish-brown C horizon; fine sandy 24 150 1.6 4,870 .17 MH24 C-283236 06AK09A 63.22578 -146.18777 Dark-brown A horizon; silty 15 200 3.0 4,230 .58 MH24 C-283237 06AK09C 63.22578 -146.18777 Gray silty C horizon with few large coarse fragments 30 180 3.5 8,590 .34 MH25 C-283238 06AK10A 63.05629 -145.87428 Silty to fine sandy A horizon; organic-rich 22 250 2.5 5,650 .19 MH25 C-283239 06AK10B 63.05629 -145.87428 Silty B horizon; gray-brown 26 260 2.7 6,140 .19 MH25 C-283240 06AK10C 63.05629 -145.87428 Silty C horizon; gray; very wet; no permafrost 27 270 3.3 6,220 .23 Map No. Laboratory No. Field No. Latitude (°N) Longitude (°W) Sample description U V

Y Zn

MH21 C-283228 06AK06A 63.07368 -145.74762 Organic-rich A horizon; dark brown; silty 0.64 190 14 93

MH21 C-283229 06AK06B 63.07368 -145.74762 Reddish-brown B horizon; silty .66 210 16 81

MH21 C-283230 06AK06C 63.07368 -145.74762 Grey C horizon; coarse-sandy .70 220 18 84

MH22 C-283231 06AK07A 63.09644 -145.75018 Dark-brown A horizon; silty; organic; some fine sand .79 190 16 81

MH22 C-283232 06AK07C 63.09644 -145.75018 Coarse gray C horizon sandy-gravely; flood plain .87 200 18 78

MH23 C-283233 06AK08A 63.22575 -146.05510 Dark-brown A horizon; silty; organic-rich .96 180 11 110

MH23 C-283234 06AK08B 63.22575 -146.05510 Red-brown B horizon; silty .88 220 12 120

MH23 C-283235 06AK08C 63.22575 -146.05510 Grayish-brown C horizon; fine sandy .53 190 11 100

MH24 C-283236 06AK09A 63.22578 -146.18777 Dark-brown A horizon; silty 1.4 150 13 85

MH24 C-283237 06AK09C 63.22578 -146.18777 Gray silty C horizon with few large coarse fragments 1.5 330 19 170

MH25 C-283238 06AK10A 63.05629 -145.87428 Silty to fine sandy A horizon; organic-rich .77 210 16 74

MH25 C-283239 06AK10B 63.05629 -145.87428 Silty B horizon; gray-brown .80 230 17 78

MH25 C-283240 06AK10C 63.05629 -145.87428 Silty C horizon; gray; very wet; no permafrost .89 240 19 86
Table 11 49 Table 11. Map, laboratory, and field numbers, site latitude and longitude, site descriptions, and chemistry of soil water, Tangle Lakes District, Alaska. [Map Nos. are shown in figure 3. Samples collected with a ceramic lysimeter (collected with a vacuum of 70–90 centibars). Soil-water chemistry determined by inductively coupled plasma-mass spectrometry. Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; μS/cm, microsiemens per centimeter; mg/L, milligram per liter; ft, foot] Map No. Laboratory No. Field No. Latitude (°N) Longitude (°W) Site elevation (ft) Underlying lithology Soil water Be (μg/L) Bi (μg/L) Ca (mg/L) Cd (μg/L) Ce (μg/L) Co (μg/L) pH Conduc- tivity (μS/cm) MH21 C-292604 06AK06L1-C 63.07368 -145.74762 4,007 Cumulate (ultramafic) 6.74 51 <0.05 < 0.2 1.9 0.03 0.97 0.22 MH22 C-292605 06AK07L1-C 63.09644 -145.75018 3,909 Cumulate (ultramafic) 6.42 180 <.05 < .2 5.5 .04 .44 .18 MH23 C-292606 06AK08L1-C 63.22575 -146.05510 3,950 Cumulate (ultramafic) 6.24 160 <.05 < .2 2.0 .07 6.1 .86 MH24 C-292607 06AK09L1-C 63.22578 -146.18777 4,460 Cumulate (ultramafic) 4.87 37 <.05 < .2 0.2 .12 1.4 .08 MH25 C-292608 06AK10L1-C 63.05629 -145.87428 3,258 Nikolai greenstone (?) 4.81 29 <.05 < .2 1.6 .12 6.8 .56 Map No. Laboratory No. Field No. Latitude (°N) Longitude (°W) Site elevation (ft) Underlying lithology Soil water Cr (μg/L) Cs (μg/L) Cu (mg/L) Dy (μg/L) Er (μg/L) Eu (μg/L) pH Conduc- tivity (μS/cm) MH21 C-292604 06AK06L1-C 63.07368 -145.74762 4,007 Cumulate (ultramafic) 6.74 51 <1 < 0.02 8.2 0.10 0.062 0.02 MH22 C-292605 06AK07L1-C 63.09644 -145.75018 3,909 Cumulate (ultramafic) 6.42 180 1.3 < .02 2.6 .084 .073 .01 MH23 C-292606 06AK08L1-C 63.22575 -146.05510 3,950 Cumulate (ultramafic) 6.24 160 1 < .02 5.5 .73 .63 .12 MH24 C-292607 06AK09L1-C 63.22578 -146.18777 4,460 Cumulate (ultramafic) 4.87 37 <1 < .02 1.1 .12 .088 .03 MH25 C-292608 06AK10L1-C 63.05629 -145.87428 3,258 Nikolai greenstone (?) 4.81 29 1.9 < .02 6.0 .70 .41 .15 Map No. Laboratory No. Field No. Latitude (°N) Longitude (°W) Site elevation (ft) Underlying lithology Soil water Fe (μg/L) Ga (μg/L) Gd (mg/L) Ge (μg/L) Ho (μg/L) K (μg/L) pH Conduc- tivity (μS/cm) MH21 C-292604 06AK06L1-C 63.07368 -145.74762 4,007 Cumulate (ultramafic) 6.74 51 120 < 0.05 0.13 < 0.05 0.02 0.07 MH22 C-292605 06AK07L1-C 63.09644 -145.75018 3,909 Cumulate (ultramafic) 6.42 180 <50 < .05 .074 .08 .02 .20 MH23 C-292606 06AK08L1-C 63.22575 -146.05510 3,950 Cumulate (ultramafic) 6.24 160 1,150 < .05 .79 .10 .19 .10 MH24 C-292607 06AK09L1-C 63.22578 -146.18777 4,460 Cumulate (ultramafic) 4.87 37 <50 < .05 .15 .07 .03 .08 MH25 C-292608 06AK10L1-C 63.05629 -145.87428 3,258 Nikolai greenstone (?) 4.81 29 260 .05 .80 .05 .14 .20
50 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska Table 11. Map, laboratory, and field numbers, site latitude and longitude, site descriptions, and chemistry of soil water, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. Samples collected with a ceramic lysimeter (collected with a vacuum of 70–90 centibars). Soil-water chemistry determined by inductively coupled plasma-mass spectrometry. Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; μS/cm, microsiemens per centimeter; mg/L, milligram per liter; ft, foot] Map No. Laboratory No. Field No. Latitude (°N) Longitude (°W) Site elevation (ft) Underlying lithology Soil water La (μg/L) Li (μg/L) Lu (mg/L) Mg (mg/L) Mn (μg/L) Mo (μg/L) pH Conduc- tivity (μS/cm) MH21 C-292604 06AK06L1-C 63.07368 -145.74762 4,007 Cumulate (ultramafic) 6.74 51 0.36 1.4 < 0.1 2.0 4.1 < 2 MH22 C-292605 06AK07L1-C 63.09644 -145.75018 3,909 Cumulate (ultramafic) 6.42 180 .20 5.4 < .1 15.8 11 < 2 MH23 C-292606 06AK08L1-C 63.22575 -146.05510 3,950 Cumulate (ultramafic) 6.24 160 2.4 24 < .1 10.6 48 < 2 MH24 C-292607 06AK09L1-C 63.22578 -146.18777 4,460 Cumulate (ultramafic) 4.87 37 .56 2.4 < .1 .05 3.3 < 2 MH25 C-292608 06AK10L1-C 63.05629 -145.87428 3,258 Nikolai greenstone (?) 4.81 29 3.0 1.4 < .1 .71 6.3 < 2 Map No. Laboratory No. Field No. Latitude (°N) Longitude (°W) Site elevation (ft) Underlying lithology Soil water Na (mg/L) Nb (μg/L) Nd (μg/L) Ni (μg/L)

P

(mg/L)

Pb

(μg/L) pH

Conductivity 

(μS/cm)

MH21 C-292604 06AK06L1-C 63.07368 -145.74762 4,007 Cumulate (ultramafic) 6.74 51 0.35 < 0.2 0.48 17 0.06 0.10

MH22 C-292605 06AK07L1-C 63.09644 -145.75018 3,909 Cumulate (ultramafic) 6.42 180 2.1 < .2 .36 6.5 .10 .20

MH23 C-292606 06AK08L1-C 63.22575 -146.05510 3,950 Cumulate (ultramafic) 6.24 160 .50 < .2 2.4 9.3 .06 .09

MH24 C-292607 06AK09L1-C 63.22578 -146.18777 4,460 Cumulate (ultramafic) 4.87 37 .46 < .2 .59 1.1 .10 .08

MH25 C-292608 06AK10L1-C 63.05629 -145.87428 3,258 Nikolai greenstone (?) 4.81 29 .50 < .2 3.2 5.6 .20 .06

Map No. Laboratory No. Field No. Latitude (°N) Longitude (°W) Site elevation (ft) Underlying lithology

Soil water

Pr

(μg/L)

Rb

(μg/L)

Sb

(μg/L)

Sc

(μg/L)

Se

(μg/L)

SiO2

(μg/L) pH

Conductivity 

(μS/cm)

MH21 C-292604 06AK06L1-C 63.07368 -145.74762 4,007 Cumulate (ultramafic) 6.74 51 0.10 0.10 <0.3 0.60 < 1 6.4

MH22 C-292605 06AK07L1-C 63.09644 -145.75018 3,909 Cumulate (ultramafic) 6.42 180 .07 .10 <.3 2.0 < 1 19

MH23 C-292606 06AK08L1-C 63.22575 -146.05510 3,950 Cumulate (ultramafic) 6.24 160 .50 .20 <.3 2.0 < 1 18

MH24 C-292607 06AK09L1-C 63.22578 -146.18777 4,460 Cumulate (ultramafic) 4.87 37 .13 .19 <.3 < .6 < 1 3.7

MH25 C-292608 06AK10L1-C 63.05629 -145.87428 3,258 Nikolai greenstone (?) 4.81 29 .77 .27 <.3 1.5 < 1 8.1
Table 11 51 Table 11. Map, laboratory, and field numbers, site latitude and longitude, site descriptions, and chemistry of soil water, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. Samples collected with a ceramic lysimeter (collected with a vacuum of 70–90 centibars). Soil-water chemistry determined by inductively coupled plasma-mass spectrometry. Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; μS/cm, microsiemens per centimeter; mg/L, milligram per liter; ft, foot] Map No. Laboratory No. Field No. Latitude (°N) Longitude (°W) Site elevation (ft) Underlying lithology Soil water Sm (μg/L) SO4 (mg/L) Sr (μg/L) Ta (μg/L) Tb (μg/L) Th (μg/L) pH Conduc- tivity (μS/cm) MH21 C-292604 06AK06L1-C 63.07368 -145.74762 4,007 Cumulate (ultramafic) 6.74 51 0.10 < 2 3.4 < 0.02 0.02 < 0.2 MH22 C-292605 06AK07L1-C 63.09644 -145.75018 3,909 Cumulate (ultramafic) 6.42 180 .08 3.0 8.2 < .02 .01 < .2 MH23 C-292606 06AK08L1-C 63.22575 -146.05510 3,950 Cumulate (ultramafic) 6.24 160 .48 < 2 14 < .02 .12 < .2 MH24 C-292607 06AK09L1-C 63.22578 -146.18777 4,460 Cumulate (ultramafic) 4.87 37 .10 < 2 2.9 < .02 .02 < .2 MH25 C-292608 06AK10L1-C 63.05629 -145.87428 3,258 Nikolai greenstone (?) 4.81 29 .69 < 2 4.2 < .02 .12 .2 Map No. Laboratory No. Field No. Latitude (°N) Longitude (°W) Site elevation (ft) Underlying lithology Soil water Ti (μg/L) Tl (μg/L) Tm (μg/L) U (μg/L) V (μg/L) W(μg/L) pH Conduc- tivity (μS/cm) MH21 C-292604 06AK06L1-C 63.07368 -145.74762 4,007 Cumulate (ultramafic) 6.74 51 2.1 <0.1 0.008 < 0.1 0.80 < 0.5 MH22 C-292605 06AK07L1-C 63.09644 -145.75018 3,909 Cumulate (ultramafic) 6.42 180 < .5 <.1 .01 < .1 .80 < .5 MH23 C-292606 06AK08L1-C 63.22575 -146.05510 3,950 Cumulate (ultramafic) 6.24 160 1.5 <.1 .081 < .1 1.8 < .5 MH24 C-292607 06AK09L1-C 63.22578 -146.18777 4,460 Cumulate (ultramafic) 4.87 37 1.3 <.1 .01 < .1 .70 < .5 MH25 C-292608 06AK10L1-C 63.05629 -145.87428 3,258 Nikolai greenstone (?) 4.81 29 6.0 <.1 .057 < .1 1.3 < .5 Map No. Laboratory No. Field No. Latitude (°N) Longitude (°W) Site elevation (ft) Underlying lithology Soil water Y (μg/L) Yb (μg/L) Zn (μg/L) Zr (μg/L) pH Conduc- tivity (μS/cm) MH21 C-292604 06AK06L1-C 63.07368 -145.74762 4,007 Cumulate (ultramafic) 6.74 51 0.62 0.06 27 < 0.2 MH22 C-292605 06AK07L1-C 63.09644 -145.75018 3,909 Cumulate (ultramafic) 6.42 180 .60 .09 29 .58 MH23 C-292606 06AK08L1-C 63.22575 -146.05510 3,950 Cumulate (ultramafic) 6.24 160 7.6 .54 68 < .2 MH24 C-292607 06AK09L1-C 63.22578 -146.18777 4,460 Cumulate (ultramafic) 4.87 37 .92 .08 63 < .2 MH25 C-292608 06AK10L1-C 63.05629 -145.87428 3,258 Nikolai greenstone (?) 4.81 29 3.5 .36 41 1.7
52 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska Table 12. Map, laboratory, and field numbers, site latitude and longitude, and chemistry of soil water, Tangle Lakes District, Alaska. [Map Nos. are shown in figure 3. Samples were collected with a ceramic lysimeter (collected with a vacuum of 70–90 centibars). Soil-water chemistry determined by inductively coupled plasma atomic- emission spectrometry (ICP-AES). Abbreviations: °N, degrees north; °W, degrees west; μg/L, microgram per liter; mg/L, milligram per liter] Map No. Laboratory No. Field No. Latitude (°N) Longitude (°W) Ag (μg/L) Al (μg/L) As (μg/L)

B

(μg/L)

Ba

(μg/L)

Be

(μg/L)

Ca

(μg/L)

Cd

(μg/L)

Co

(μg/L)

Cr 

(μg/L)

Cu

(μg/L)

Fe

(μg/L)

MH21 C-292604 06AK06L1-C 63.07368 -145.74762 <5 130 <200 <5 <1 <10 2.1 <5 <10 <10 <10 140MH22 C-292605 06AK07L1-C 63.09644 -145.75018 <5 36 <200 <5 1.2 <10 5.7 <5 <10 <10 <10 <20MH23 C-292606 06AK08L1-C 63.22575 -146.05510 <5 110 <200 <5 3.0 <10 2.2 <5 <10 <10 <10 1,290

MH24 C-292607 06AK09L1-C 63.22578 -146.18777 <5 120 <200 <5 22 <10 .20 <5 <10 <10 <10 29MH25 C-292608 06AK10L1-C 63.05629 -145.87428 <5 570 <200 <5 7.1 <10 1.7 <5 <10 <10 <10 290

Map No. Laboratory No. Field No. Latitude (°N) Longitude (°W)

K

(mg/L)

Li

(μg/L)

Mg

(mg/L)

Mn

(μg/L)

Mo

(μg/L)

Na

(mg/L)

Ni

(μg/L)

P

(μg/L)

Pb

(μg/L)

Sb

(μg/L)

SiO2

(mg/L)

SO4

(μg/L)

MH21 C-292604 06AK06L1-C 63.07368 -145.74762 <0.1 <5 2.4 <10 <20 0.38 17 <0.5 <50 <50 6.7 1.2

MH22 C-292605 06AK07L1-C 63.09644 -145.75018 .20 5.0 17.8 12 <20 2.3 <10 <.5 <50 <50 22 4.0

MH23 C-292606 06AK08L1-C 63.22575 -146.05510 <.1 23 12.4 53 <20 .55 <10 <.5 <50 <50 20 2.5

MH24 C-292607 06AK09L1-C 63.22578 -146.18777 <.1 <5 <.1 <10 <20 .52 <10 <.5 <50 <50 4.5 <1

MH25 C-292608 06AK10L1-C 63.05629 -145.87428 .23 <5 .85 <10 <20 .54 <10 <.5 <50 <50 9.7 1.2

Map No. Laboratory No. Field No. Latitude (°N) Longitude (°W) Sr (μg/L) Ti (μg/L)

V

(μg/L)

Zn

(mg/L)

MH21 C-292604 06AK06L1-C 63.07368 -145.74762 3.5 <50 <10 <20

MH22 C-292605 06AK07L1-C 63.09644 -145.75018 8.1 <50 <10 28

MH23 C-292606 06AK08L1-C 63.22575 -146.05510 15 <50 <10 57

MH24 C-292607 06AK09L1-C 63.22578 -146.18777 3.0 <50 <10 69

MH25 C-292608 06AK10L1-C 63.05629 -145.87428 4.3 <50 <10 45
Table 13 53

Table 13. Map, laboratory, and field numbers, site latitude and longitude, and major-anion chemistry of soil-water samples, 

Tangle Lakes District, Alaska.

[Map Nos. are shown in figure 3. All values are in milligrams per liter. Samples were collected with a ceramic lysimeter (drawn through at 70–90 

centibars). Soil-water chemistry determined by ion chromatography. Abbreviations: °N, degrees North; °W, degrees west]

Map 

No.

Laboratory

No.

Field

No.

Latitude

(°N)

Longitude

(°W) F- Cl- NO3

- SO42-

MH21 C-292604 06AK06L1-A 63.07368 -145.74762 0.01 0.22 1.2 0.57

MH22 C-292605 06AK07L1-A 63.09644 -145.75018 .05 2.21 4.3 3.16

MH23 C-292606 06AK08L1-A 63.22575 -146.05510 .15 .59 4.6 1.53

MH24 C-292607 06AK09L1-A 63.22578 -146.18777 .50 .73 .18 .80

MH25 C-292608 06AK10L1-A 63.05629 -145.87428 .55 .65 .50 .53
54 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska Table 14. Map, laboratory, and field numbers, site latitude and longitude, sample description, and chemistry of willow leaf material (dry-weight basis), Tangle Lakes District, Alaska. [Map Nos. are shown in figure 3. All element values are in parts per million (ppm). Samples were collected from the terminal 10–20 centimeters of stems. Plant chemistry determined by inductively coupled plasma-mass spectrometry (ICP-MS). Abbreviations: °N, degrees North; °W, degrees West; <, less than] Map No. Laboratory No. Field No. Latitude (°N) Longitude (°W) Sample description Ash yield (percent) Al Al As Ba Be Bi Ca Cd Ce MH21 C-283246 06AK06W 63.07368 -145.74762 Composite of 3 shrubs 4.25 <0.1 <50 <1 1.2 <0.03 <0.06 1,840 0.4 <0.1 MH22 C-283247 06AK07W 63.09644 -145.75018 Composite of 1 shrub 5.00 <.1 <50 <1 2.0 <.03 <.06 3,100 1.4 <.1 MH23 C-283248 06AK08W 63.22575 -146.05510 Composite of 3 shrubs 4.00 <.1 69 <1 40 <.03 <.06 5,030 1.1 <.1 MH24 C-283249 06AK09W 63.22578 -146.18777 Composite of 5 shrubs 5.25 <.1 87 <1 60 <.03 <.06 5,750 2.3 <.1 MH25 C-283250 06AK10W 63.05629 -145.87428 Composite of 3 shrubs 4.50 <.1 <50 <1 3.8 <.03 <.06 4,800 1.4 <.1 MH26 C-283251 06AK11W 63.22145 -145.91254 Composite of 4 shrubs 5.25 <.1 <50 <1 2.4 <.03 <.06 2,940 .54 <.1 Map No. Laboratory No. Field No. Latitude (°N) Longitude (°W) Sample description Ash yield (percent) Co Cr Cs Cu Fe Ga K La Li MH21 C-283246 06AK06W 63.07368 -145.74762 Composite of 3 shrubs 4.25 0.64 <0.5 0.04 9.4 64 0.02 <20 <0.05 1.2 MH22 C-283247 06AK07W 63.09644 -145.75018 Composite of 1 shrub 5.00 2.5 <.5 .05 8.2 81 .04 <20 <.05 2.2 MH23 C-283248 06AK08W 63.22575 -146.05510 Composite of 3 shrubs 4.00 5.9 <.5 .05 4.8 60 .03 9,720 .08 .30 MH24 C-283249 06AK09W 63.22578 -146.18777 Composite of 5 shrubs 5.25 1.9 <.5 .04 9.1 120 .05 13,500 <.05 2.0 MH25 C-283250 06AK10W 63.05629 -145.87428 Composite of 3 shrubs 4.50 2.0 <.5 .05 7.0 72 .03 10,300 <.05 1.6 MH26 C-283251 06AK11W 63.22145 -145.91254 Composite of 4 shrubs 5.25 3.8 <.5 .10 7.4 68 .04 14,900 <.05 .80 Map No. Laboratory No. Field No. Latitude (°N) Longitude (°W) Sample description Ash yield (percent) Mg Mn Mo Na Nb Ni P Pb Rb MH21 C-283246 06AK06W 63.07368 -145.74762 Composite of 3 shrubs 4.25 5,740 130 0.10 48 < 0.1 12 4,570 <0.4 18 MH22 C-283247 06AK07W 63.09644 -145.75018 Composite of 1 shrub 5.00 5,150 390 .10 45 < .1 15 6,430 <.4 23 MH23 C-283248 06AK08W 63.22575 -146.05510 Composite of 3 shrubs 4.00 2,860 550 <.05 40 < .1 19 3,680 <.4 13 MH24 C-283249 06AK09W 63.22578 -146.18777 Composite of 5 shrubs 5.25 2,610 580 .22 66 < .1 9.6 6,080 <.4 15 MH25 C-283250 06AK10W 63.05629 -145.87428 Composite of 3 shrubs 4.50 4,850 260 .20 56 < .1 6.3 4,840 <.4 9.3 MH26 C-283251 06AK11W 63.22145 -145.91254 Composite of 4 shrubs 5.25 6,050 480 .10 53 < .1 10 7,190 <.4 25 Map No. Laboratory No. Field No. Latitude (°N) Longitude (°W) Sample description Ash yield (percent) Sb Sc Sr Th Ti Tl U V

Y Zn

MH21 C-283246 06AK06W 63.07368 -145.74762 Composite of 3 shrubs 4.25 <0.04 <0.04 4.7 <0.1 <40 <0.08 < 0.02 <0.2 <0.05 130

MH22 C-283247 06AK07W 63.09644 -145.75018 Composite of 1 shrub 5.00 <.04 <.04 8.7 <.1 <40 <.08 < .02 <.2 <.05 68

MH23 C-283248 06AK08W 63.22575 -146.05510 Composite of 3 shrubs 4.00 <.04 <.04 63 <.1 <40 <.08 < .02 <.2 <.05 81

MH24 C-283249 06AK09W 63.22578 -146.18777 Composite of 5 shrubs 5.25 <.04 <.04 50 < .1 <40 <.08 < .02 .2 <.05 200

MH25 C-283250 06AK10W 63.05629 -145.87428 Composite of 3 shrubs 4.50 <.04 <.04 13 < .1 <40 <.08 < .02 <.2 <.05 91

MH26 C-283251 06AK11W 63.22145 -145.91254 Composite of 4 shrubs 5.25 <.04 < .04 9.4 < .1 <40 <.08 < .02 <.2 <.05 85
Table 15 55 Table 15. Map and field numbers, site latitude and longitude, sample sources and descriptions, collection method, and chemistry of bedrock samples, Tangle Lakes District, Alaska. [Map Nos. are shown in figure 3. All values in parts per billion (ppb). Samples were collected from outcrops. Au, Pd, and Pt determined by flame-assay direct-current plasma (FA-DCP), and Hg determined by cold vapor-atomic absorption spectroscopy (CV-AAS); all other elements were determined by inductively coupled plasma-mass spectrometry (ICP-MS). Abbreviations: °N, degrees North; °W, degrees West; ft, foot; <, less than] Map No. Field No. Latitude (°N) Longitude (°W) Collection date Location description Sample description Collection method Au Pd Pt Hg Ag Al MH31 06GL077R 63.32220 -146.05052 06-21-06 Ridge W of upper W Specimen Cr. Fe-stained basalt, ls w/qz-calcite stockwork Composite 1 5 13.4 0.03 <2 12,500 MH32 06GL092R 63.27601 -146.27095 06-25-06 N tributary of N tributary of Eureka Cr. at 3,510 ft elevation Ultramafic cumulate Composite 1 62 40.8 <.02 <2 2,150 MH33 06GL094R 63.31912 -146.32547 06-25-06 E tributary upper Eureka Cr. at 4,350 ft elevation Rusty ultramafic cumulate with sulfides Composite 78 <1 1.8 .03 <2 82,500 Map No. Field No. Latitude (°N) Longitude (°W) Collection date Location description Sample description Collection method As Ba Be Bi Ca Cd MH31 06GL077R 63.32220 -146.05052 06-21-06 Ridge W of upper W Specimen Cr. Fe-stained basalt, ls w/qz-calcite stockwork Composite <1 16.8 0.08 < 0.06 27,800 0.06 MH32 06GL092R 63.27601 -146.27095 06-25-06 N tributary of N tributary of Eureka Cr. at 3,510 ft elevation Ultramafic cumulate Composite <1 5.8 <.03 < .06 3,580 .03 MH33 06GL094R 63.31912 -146.32547 06-25-06 E tributary upper Eureka Cr. at 4,350 ft elevation Rusty ultramafic cumulate with sulfides Composite 104 1,530 .72 3.15 4,580 .03 Map No. Field No. Latitude (°N) Longitude (°W) Collection date Location description Sample description Collection method Ce Co Cr Cs Cu Fe MH31 06GL077R 63.32220 -146.05052 06-21-06 Ridge W of upper W Specimen Cr. Fe-stained basalt, ls w/qz-calcite stockwork Composite 3.2 91.1 1,360 0.06 39.9 61,800 MH32 06GL092R 63.27601 -146.27095 06-25-06 N tributary of N tributary of Eureka Cr. at 3,510 ft elevation Ultramafic cumulate Composite .51 174 1,350 .02 190 112,000 MH33 06GL094R 63.31912 -146.32547 06-25-06 E tributary upper Eureka Cr. at 4,350 ft elevation Rusty ultramafic cumulate with sulfides Composite 12.6 10.3 19.4 .97 14.8 54,400
56 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska Map No. Field No. Latitude (°N) Longitude (°W) Collection date Location description Sample description Collection method Ga K La Li Mg Mn MH31 06GL077R 63.32220 -146.05052 06-21-06 Ridge W of upper W Specimen Cr. Fe-stained basalt, ls w/qz-calcite stockwork Composite 3 271 1.4 1.9 170,000 1,020 MH32 06GL092R 63.27601 -146.27095 06-25-06 N tributary of N tributary of Eureka Cr. at 3,510 ft elevation Ultramafic cumulate Composite .7 64.4 .25 3.2 247,000 1,660 MH33 06GL094R 63.31912 -146.32547 06-25-06 E tributary upper Eureka Cr. at 4,350 ft elevation Rusty ultramafic cumulate with sulfides Composite 17.2 35,100 6.7 4.2 19,200 580 Map No. Field No. Latitude (°N) Longitude (°W) Collection date Location description Sample description Collection method Mo Na Nb Ni P Pb MH31 06GL077R 63.32220 -146.05052 06-21-06 Ridge W of upper W Specimen Cr. Fe-stained basalt, ls w/qz-calcite stockwork Composite 0.36 441 2.6 1,590 133 0.78 MH32 06GL092R 63.27601 -146.27095 06-25-06 N tributary of N tributary of Eureka Cr. at 3,510 ft elevation Ultramafic cumulate Composite < .05 305 < .1 1,500 25 <.4 MH33 06GL094R 63.31912 -146.32547 06-25-06 E tributary upper Eureka Cr. at 4,350 ft elevation Rusty ultramafic cumulate with sulfides Composite 8 1,300 1.1 5.7 369 13.1 Map No. Field No. Latitude (°N) Longitude (°W) Collection date Location description Sample description Collection method Rb Sb Sc Sr Th Ti MH31 06GL077R 63.32220 -146.05052 06-21-06 Ridge W of upper W Specimen Cr. Fe-stained basalt, ls w/qz-calcite stockwork Composite 0.93 <0.04 8.5 41.4 0.34 1,490 MH32 06GL092R 63.27601 -146.27095 06-25-06 N tributary of N tributary of Eureka Cr. at 3,510 ft elevation Ultramafic cumulate Composite .14 <.04 7 8 < .1 328 MH33 06GL094R 63.31912 -146.32547 06-25-06 E tributary upper Eureka Cr. at 4,350 ft elevation Rusty ultramafic cumulate with sulfides Composite 106 4 20.4 20.2 2.18 2,270 Table 15. Map and field numbers, site latitude and longitude, sample sources and descriptions, collection method, and chemistry of bedrock samples, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. All values in parts per billion (ppb). Samples were collected from outcrops. Au, Pd, and Pt determined by flame-assay direct-current plasma (FA-DCP), and Hg determined by cold vapor-atomic absorption spectroscopy (CV-AAS); all other elements were determined by inductively coupled plasma-mass spectrometry (ICP-MS). Abbreviations: °N, degrees North; °W, degrees West; ft, foot; <, less than]
Table 15 57 Map No. Field No. Latitude (°N) Longitude (°W) Collection date Location description Sample description Collection method Tl U V Y Zn MH31 06GL077R 63.32220 -146.05052 06-21-06 Ridge W of upper W Specimen Cr. Fe-stained basalt, ls w/qz-calcite stockwork Composite <0.08 0.13 50.5 4.5 55.4 MH32 06GL092R 63.27601 -146.27095 06-25-06 N tributary of N tributary of Eureka Cr. at 3,510 ft elevation Ultramafic cumulate Composite <.08 < .02 15.6 .86 69.2 MH33 06GL094R 63.31912 -146.32547 06-25-06 E tributary upper Eureka Cr. at 4,350 ft elevation Rusty ultramafic cumulate with sulfides Composite 1.23 1.42 134 19.8 75.3 Table 15. Map and field numbers, site latitude and longitude, sample sources and descriptions, collection method, and chemistry of bedrock samples, Tangle Lakes District, Alaska.—Continued [Map Nos. are shown in figure 3. All values in parts per billion (ppb). Samples were collected from outcrops. Au, Pd, and Pt determined by flame-assay direct-current plasma (FA-DCP), and Hg determined by cold vapor-atomic absorption spectroscopy (CV-AAS); all other elements were determined by inductively coupled plasma-mass spectrometry (ICP-MS). Abbreviations: °N, degrees North; °W, degrees West; ft, foot; <, less than]
58 Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska

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Manuscript approved for publication, August 15, 2008

Prepared by the USGS Publishing Network, 

George Havach

Bobbie Jo Richey

Sharon Wahlstrom

For more information concerning the research in this report, contact the 

Alaska Science Center

U.S. Geological Survey

4230 University Drive, Suite 201

Anchorage, Alaska 99508-4664

http://alaska.usgs.gov
Wang and others— Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska—Open-File Report 2008–1260