Whole-Rock and Sulfide-Mineral Geochemical Data for 

Samples from Volcanogenic Massive Sulfide Deposits of 

the Bonnifield District, East-Central Alaska

By Cynthia Dusel-Bacon, John F. Slack, Alan E. Koenig, Nora K. Foley, Robert L. Oscarson, 

and Kathleen D. Gans

Open-File Report 2011–1171

U.S. Department of the Interior

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

KEN SALAZAR, Secretary

U.S. Geological Survey

Marcia K. McNutt, Director

U.S. Geological Survey, Reston, Virginia: 2011 

For more information on the USGS—the Federal source for science about the Earth,

its natural and living resources, natural hazards, and the environment—visit 

http://www.usgs.gov or call 1–888–ASK–USGS

For an overview of USGS information products, including maps, imagery, and publications,

visit http://www.usgs.gov/pubprod

Suggested citation:

Dusel-Bacon, Cynthia, Slack, J.F., Koenig, A.E., Foley, N.K., Oscarson, R.L., and Gans, K.D., 2011, Whole-rock and 

sulfide-mineral geochemical data for samples from volcanogenic massive sulfide deposits of the Bonnifield district, 

east-central Alaska: U.S. Geological Survey Open-File Report 2011-1171, 43 p. and data tables

[http://pubs.usgs.gov/of/2011/1171/].

Any use of trade, product, or firm names is for descriptive purposes only and does not imply 

endorsement by the U.S. Government. 

Although this report is in the public domain, permission must be secured from the individual 

copyright owners to reproduce any copyrighted material contained within this report.
Contents

Introduction...................................................................................................................................................................... 1

Contents of This Open-File Publication:.......................................................................................................................... 1

References ...................................................................................................................................................................... 2

Appendix ......................................................................................................................................................................... 3

Analytical Methods....................................................................................................................................................... 3

Whole-rock geochemical analyses by Activation Laboratories (data labeled “ACT Lab” in tables 1 and 2). ........... 3

Whole-rock geochemical analyses by Chemex Laboratories (data labeled “Chemex”in tables 2 and 3). ............... 3

Electron microprobe analyses (data presented in tables 5 and 6)........................................................................... 3

Laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) analyses of sphalerite and pyrite 

(data presented in table 7). ...................................................................................................................................... 4

Figure

1. Sample Location Map. Locations for samples from the Bonnifield district, Alaska, whose analyses are given in 

tables 1-7. A, Area of Dry Creek and WTF deposits (Healy D-1 quadrangle). B, Area of Anderson Mountain 

deposit (Healy D-2 quadrangle). C, Area ~10 km NE of WTF deposit (Fairbanks A-1 quadrangle)......................... 5

Tables

1. Whole-rock geochemical analyses from Activation Laboratories, Ancaster, Ontario, Canada, of mineralized 

and associated unmineralized samples, Bonnifield district, Alaska.......................................................................... 6

2. Whole-rock metal contents for Bonnifield samples in which Zn, Pb, or Cu are >1,000 ppm or 

Ag content is >20 ppm............................................................................................................................................ 12

3. Whole-rock geochemical analyses from Chemex Laboratories, Vancouver, B.C., Canada, of mineralized 

and associated unmineralized samples, Bonnifield district, Alaska........................................................................ 15

4. Whole-rock geochemical analyses of mineralized and unmineralized Bonnifield samples for which fluorine 

was analyzed. ......................................................................................................................................................... 18

5. Averages of electron microprobe analyses of sulfide minerals from the Bonnifield district, Alaska........................ 20

6. Complete electron microprobe analyses of sulfide minerals from the Bonnifield district, Alaska. .......................... 22

7. Trace-element contents of pyrite and sphalerite by laser ablation–inductively coupled–mass spectrometry 

analysis from the Bonnifield district, Alaska............................................................................................................ 36
iv

This page intentionally left blank
Whole-Rock and Sulfide-Mineral Geochemical Data for 

Samples from Volcanogenic Massive Sulfide Deposits 

of the Bonnifield District, East-Central Alaska

By Cynthia Dusel-Bacon, John F. Slack, Alan E. Koenig, Nora K. Foley, Robert L. Oscarson, 

and Kathleen D. Gans 

Introduction

This Open-File Report presents geochemical data for outcrop and drill-core samples from 

volcanogenic massive sulfide deposits and associated metaigneous and metasedimentary rocks in 

the Wood River area of the Bonnifield mining district, northern Alaska Range, east-central 

Alaska. The data consist of major- and trace-element whole-rock geochemical analyses and 

major- and trace-element analyses of sulfide minerals determined by electron microprobe and 

laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) techniques. The 

text and tables in this report are available online at http://pubs.usgs.gov/of/2011/1171/. The PDF 

consists of text, appendix explaining the analytical methods used for the analyses presented in 

the data tables, a sample location map, and seven data tables. The seven tables are also available 

as spreadsheets in several file formats. Descriptions and discussions of the Bonnifield deposits 

are given in Dusel-Bacon and others (2004, 2005, 2006, 2007, 2010). 

Contents of This Open-File Publication • Text 

• Appendix describing analytical methods 

• Sample Location Map. Locations for samples from the Bonnifield district, Alaska, 

whose analyses are given in tables 1-7 

• Tables 1-7 http://pubs.usgs.gov/of/2011/1171/of2011-1171_tables_1-7/

Table 1. Whole-rock geochemical analyses from Activation Laboratories, 

Ancaster, Ontario, Canada, of mineralized and associated unmineralized samples, 

Bonnifield district, Alaska. 

Table 2. Whole-rock metal contents for Bonnifield samples in which Zn, Pb, or 

Cu are >1,000 ppm or Ag content is >20 ppm. 

Table 3. Whole-rock geochemical analyses from Chemex Laboratories, 

Vancouver, B.C., Canada, of mineralized and associated unmineralized samples, 

Bonnifield district, Alaska. 

Table 4. Whole-rock geochemical analyses of mineralized and unmineralized 

Bonnifield samples for which fluorine was analyzed. 
2 

Table 5. Averages of electron microprobe analyses of sulfide minerals from the 

Bonnifield district, Alaska. 

Table 6. Complete electron microprobe analyses of sulfide minerals from the 

Bonnifield district, Alaska. 

Table 7. Trace-element contents of pyrite and sphalerite by laser ablation–

inductively coupled–mass spectrometry analysis from the Bonnifield district, 

Alaska. 

References

Dusel-Bacon, C., Wooden, J.L., and Hopkins, M.J., 2004, U-Pb zircon and geochemical 

evidence for bimodal mid-Paleozoic magmatism and syngenetic base-metal 

mineralization in the Yukon-Tanana terrane, Alaska: Geological Society of America 

Bulletin, v. 116, p. 989–1015 doi: 10.1130/B25342.1. 

Dusel-Bacon, C., Premo, W.R., and Aleinikoff, J.N., 2005, Geochemical and Nd isotopic 

evidence for an extending continental-margin arc/back arc setting for peralkaline 

rhyolite-hosted massive sulfide deposits of the Bonnifield district, east-central Alaska 

[abs.]: Geological Society of America Abstracts with Programs, v. 37, no. 7, p. 97. 

Dusel-Bacon, C., Hopkins, M.J., Mortensen, J.K., Dashevsky, S.S., Bressler, J.R., and Day, 

W.C., 2006, Paleozoic tectonic and metallogenic evolution of the pericratonic rocks of 

east-central Alaska and adjacent Yukon Territory, in Colpron, Maurice, and Nelson, J.L., 

eds., Paleozoic evolution and metallogeny of pericratonic terranes at the ancient Pacific 

margin of North America, Canadian and Alaskan Cordillera: Geological Association of 

Canada Special Paper 45, p. 25–74. 

Dusel-Bacon, C., Slack, J.F., and Belkin, H.E., 2007, The magmatic to hydrothermal transition in 

peralkaline-hosted VMS systems—An example from the Bonnifield district, east-central 

Alaska, USA, in Andrew, C.J., ed., Proceedings of the 9th Biennial Meeting of the 

Society for Geology Applied to Mineral Deposits, Dublin, Ireland, 20th–23rd August 

2007, Mineral Exploration and Research—Digging Deeper: Dublin, Irish Association for 

Economic Geology, v. 2, p. 1045–1048. 

Dusel-Bacon, C., Aleinikoff, J.N., Premo, W.R., Paradis, S., and Lohr-Schmidt, I., 2010, 

Tectonic setting and metallogenesis of volcanogenic massive-sulfide deposits in the 

Bonnifield mining district, northern Alaska Range, in Gough, L.P., and Day, W.C., eds., 

Recent U.S. Geological Survey studies in the Tintina gold province Alaska, U.S.A., and 

Yukon, Canada—Summary results of a five-year project: U.S. Geological Survey 

Scientific Investigations Report 2007-5289-B, p. B1–B8 

[http://pubs.usgs.gov/sir/2007/5289/SIR2007-5289-B.pdf]. 

Longerich, H.P., Günther, D., and Jackson, S.E., 1996, Elemental fractionation in laser ablation 

inductively coupled plasma mass spectrometry: Fresenius' Journal of Analytical 

Chemistry, v. 17, p. 538–542, doi:10.1007/s0021663550538. 

Wilson, S.A., Ridley, W.I., and Koenig, A.E., 2002, Development of sulfide calibration 

standards for the laser ablation inductively-coupled plasma mass spectrometry technique: 

Journal of Analytical Atomic Spectrometry, v. 17, p. 406–409. 
3 

Appendix

Analytical Methods

Whole-rock geochemical analyses by Activation Laboratories (data labeled “ACT Lab” in tables 1

and 2).

Analyses were made by Activation Laboratories, Ancaster, Ontario, Canada. Samples for 

geochemical analysis were trimmed of weathered surfaces and veins and then pulverized in an 

alumina-ceramic mortar. Major, selected trace, and rare earth elements (REE) were determined 

by inductively coupled plasma-mass spectrometry (ICP-MS) on rock powders fused with lithium 

metaborate/tetraborate in order to insure complete acid dissolution of minerals such as zircon, 

monazite, xenotime, and barite prior to analysis. F was analyzed by fusion ion selective 

electrode. Instrumental neutron activation analysis (INAA) was used for As, Sb, Sc, and Cr. Data 

for Li, B, Ga, Co, Cd, Au, Pb, Mo, Re, Te, and Se were acquired by a multi-acid digestion of 

powders followed by ultratrace ICP-MS analysis, which has higher precisions and lower 

detection limits than the fusion ICP-MS method. Analyses were obtained on duplicate samples 

and 8 to 12 standards. Details of the various analytical methods, including accuracy and 

precision, are available at www.actlabs.com. In order to evaluate comparability of the data we 

acquired from different laboratories, three samples (97ADb58d1, 97ADb59e, and 97ADb61a) 

were submitted to both Activation and Chemex laboratories for independent analysis; all results 

are similar. 

Whole-rock geochemical analyses by Chemex Laboratories (data labeled “Chemex”in tables 2 

and 3).

Analyses were made by by Chemex Labs, Vancouver, B.C., Canada. Rocks were pulverized 

using a tungsten carbide ring mill; clean silica sand was run between each sample during 

pulverization. Analytical methods used: Oxides, wavelength-dispersive X-ray fluorescence 

(XRF); Total sulfur and total carbon, Leco furnace (Leco-Ir detector); inorganic carbon, Leco 

furnace (Leco-gasometric); Au, Pt, and Pd, Fire Assay (FA) inductively coupled-plasma (ICP); 

all other trace elements (except Ba) with values in ppm or ppb were done by ICP-atomic 

emission spectrometry (AES) Nitric-Aqua-Regia-leach. Ag in oz/T analyzed by FA gravimetric. 

Pb and Zn reported in % analyzed by Concentrated Nitric-HCl digestion by AAS. Ba reported in 

ppm and % analyzed by XRF. In order to evaluate comparability of the data we acquired from 

different laboratories, three samples (97ADb58d1, 97ADb59e, and 97ADb61a) were submitted 

to both Chemex and Activation laboratories for independent analysis; all results are similar. 

Electron microprobe analyses (data presented in tables 5 and 6).

Electron microprobe analyses were conducted at the USGS in Menlo Park, California (tables 5 

and 6), and Reston, Virginia. Concentrations of 12 elements (Cu, Pb, As, Fe, S, Zn, Cd, Se, Mn, 

Ag, Co, and Ni) were determined for all samples, as well as Sb, Hg, and Sn for most, by 

wavelength-dispersion analysis using a JEOL 8900 Superprobe equipped with five 

spectrometers. Operating conditions were a 15kv accelerating voltage, 30nA beam current, 

focused beam, and 20 s counting period on peaks and backgrounds per analysis. Mineral 

standards included natural pyrite for calibration of Fe and S; chalcopyrite for Cu and S; galena 

for Pb; synthetic ZnS for Zn; CdS for Cd; elemental Se for Se; Mn2O3 for Mn; Ag2S for Ag; 
4 

skutterudite for As and Co; pentlandite for Ni; stibnite for Sb; cinnabar for Hg; and cassiterite for 

Sn. X-ray intensities were converted to concentrations using a ZAF correction. 

Laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) analyses of sphalerite 

and pyrite (data presented in table 7).

Laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) analyses of 

sphalerite and pyrite were collected at the Denver, CO, USGS facility using a CETAC 

Technologies LSX-500 LA system (266 nm) coupled to a PerkinElmer ELAN6000. Typical 

operating conditions for both were similar (spot size = 25μm, 50μm; pulse frequency = 2 Hz; 

energy density = ~5 J/cm2, RF power = 1400 W, 1260 W; He carrier gas flow = 0.8-.95 l/min; Ar 

gas flow = 0.7-1.0 l/min). Signals were calibrated using the U.S. Geological Survey reference 

material MASS-1 (Wilson and others, 2002); the reference material was analyzed 3–5 times at 

each analytical condition at the start of an analytical session and monitored throughout for drift. 

Concentrations were determined using off-line calculations following the protocol of Longerich 

and others (1996). Iron and Zn (for pyrite and sphalerite, respectively) were used as the internal 

standard for concentration calculations. Heterogeneities such as mineral inclusions or zoning 

were screened by noting changes in signal coupled with petrographic analysis. Errors in 

determinations result from the necessity of assuming stoichiometric values for sulfide, 

incomplete removal of mineral inclusions from the integrated spectra, and the homogeneity of 

the reference material with respect to each element (Wilson and others, 2002). 
5

Figure 1. Sample Location Map. Locations for samples from the Bonnifield district, Alaska, whose 

analyses are given in tables 1-7. A, Area of Dry Creek and WTF deposits (Healy D-1 quadrangle). B, 
Table 1. Whole-rock geochemical analyses from Activation Laboratories, Ancaster, Ontario, Canada, of 

mineralized and associated unmineralized argillite, Bonnifield district, Alaska. 

Sample 97ADb61a 05ADb21 03ADb08 97ADb59e DC98-38-237 DC98-41-229 DC98-40-41

Setting DC South Red Mountain 

summit

South of Dry 

Ck deposit 

(Keevy Peak 

Fm)

Discovery Zone Fosters Ck zone Fosters Ck zone Fosters Ck zone

Lithology siliceous MS; 

major sl

quartz-muscovite 

schist; minor py 

gray phyllite MS; major sl & 

gn; minor cp & 

gold

gray pyritic 

argillite with felsic 

clasts; minor py & 

sl

gray graphitic 

argillite; minor sl

gray 

argillite/phyllite

Wt. %

SiO2 61.64 75.03 78.25 18.08 66.18 74.45 77.09

Al2O3 3.86 7.98 10.84 0.08 14.97 9.72 7.87

Fe2O3T 10.44 3.51 2.88 4.38 4.11 2.83 4.13

MnO 0.115 0.003 0.009 0.005 0.022 0.01 0.033

MgO 2.51 0.05 1.29 < 0.01 1.23 1.1 2.28

CaO 0.02 0.03 0.1 0.03 0.64 0.39 0.05

Na2O 0.05 0.17 0.71 < 0.01 5.05 2.79 3.14

K2O 0.37 6.89 2.61 0.12 1.47 2.81 1.82

TiO2 0.088 0.244 0.493 < 0.001 0.472 0.338 0.343

P2O5 0.02 0.04 0.11 < 0.01 0.41 0.29 0.08

LOI 7.55 1.78 2.57 18.69 4.76 4.5 3.09

Total 86.65 95.72 99.85 41.26 99.31 99.22 99.92

Total C 0.13 0.04 0.26 0.38 0.48 1.29 0.21

Graphitic C < 0.05 < 0.05 0.23 0.09 0.42 1.17 0.22

Organic C < 0.05 < 0.05 0.05 0.19 0.05 0.12 <0.05

TOC <0.05 <0.05 0.28 0.28 0.47 1.29 0.22

CO2 0.24 0.05 <0.05 0.05 <0.05 <0.05 <0.05

S 8.47 1.43 0.12 28.4 2.5 1.61 0.92

SO4 0.16 < 0.05 0.09 4.62 0.29 0.27 0.21

F 0.11 < 0.01 0.07 0.04 0.10 0.14 0.16

ppm

Br < 0.5 < 0.5 <0.5 < 0.5 <0.5 <0.5 <0.5

Be < 1 < 1 2 < 1 5 5 4

V < 5 < 5 179 < 5 444 603 47

Sc 0.5 1 12 0.4 6 4 5

Ga 16 15 16 13 35 22 16

Ge 1.2 0.9 1.7 < 0.5 2.1 0.9 2.2

Rb 12 153 116 1 64 130 88

Sr < 2 19 49 2 54 22 7

Cr 33 70 60 < 5 64 77 26

Zr 240 782 111 < 4 511 441 332

Hf 6 17.6 2.8 < 0.1 19.1 13.0 10.5

Nb 34.7 93.8 12.6 0.7 158.8 72.1 52.1

Ta 2.13 7.40 0.88 0.02 7.73 5.88 3.66

Co 4 3 <1 3 6 8 6

Ni 2 4 34 31 90 111 26

Cu 1880 58 22 1250 38 64 36

Zn 66700 1020 66 300000 4147 1077 158

Cd 326 12 <0.3 1720 34 10 1

Pb 4140 1230 12 153000 53 31 20

Sb 16.1 7.8 1.5 307 29.7 16.4 10

As 46.8 191 7.1 243 101 69.7 31.3

Bi 171 22.30 1.55 45.9 2.07 0.11 1.54

 [Analytical methods described in Appendix. Abbreviations: AM = Anderson Mountain, Ck = Creek, cp = chalcopyrite, gn = 

galena, MS = massive sulfide, py = pyrite, sl = sphalerite; WTF = West Tundra Flats. Sample locations shown on Sample 

Location Map]

6
Table 1 (continued). Whole-rock geochemical analyses from Activation Laboratories, Ancaster, Ontario, Canada, of 

mineralized and associated unmineralized argillite, Bonnifield district, Alaska. 

Sample 97ADb61a 05ADb21 03ADb08 97ADb59e DC98-38-237 DC98-41-229 DC98-40-41

Tl 0.18 3.32 1.17 2.05 7.40 4.30 6.85

Mo 5 24 <1 11 30 41 <1

Se 12 < 3 <3 17 7.5 7.5 <3

Ag 10 4.0 <0.3 323 1.3 1.3 0.8

Au ppb 68 9 <2 3460 <2 <2 <2

Hg ppb 10100 446 33000

Ir ppb < 5 < 5 5 < 5 <5 <5 <5

In 0.5 0.20 <0.1 3.7 0.36 <0.1 <0.1

Sn 7 10.00 <1 25 10.12 3.61 4.23

W 1.9 2.40 0.95 4.4 3.75 7.52 2.74

Cs 0.3 0.50 4.63 < 0.1 5.76 8.21 6.33

Ba 76 1003.00 1420.00 24 942.46 888.13 307.10

Y 36.7 99.30 13.99 < 0.5 81.30 64.58 45.87

La 85.4 63.80 30.69 7.35 147.76 50.68 17.08

Ce 158 125.00 52.64 8.6 260.41 115.63 30.24

Pr 16.9 14.30 6.24 0.57 30.96 15.21 3.52

Nd 56.6 59.70 22.90 1.44 116.36 61.70 13.22

Sm 8.74 15.30 4.10 0.21 24.69 13.89 3.44

Eu 0.529 1.21 0.73 0.025 1.67 1.15 0.43

Gd 7.11 16.40 3.25 0.07 21.86 12.96 4.64

Tb 1.25 3.04 0.45 0.01 3.48 2.39 1.15

Dy 7.13 19.00 2.51 0.08 17.45 12.71 7.39

Ho 1.39 3.80 0.48 0.01 3.10 2.36 1.63

Er 3.85 11.20 1.57 0.03 9.28 7.31 5.88

Tm 0.535 1.79 0.24 < 0.005 1.32 1.12 1.01

Yb 3.05 11.80 1.57 0.02 7.20 6.57 6.62

Lu 0.412 1.69 0.23 0.003 0.94 0.92 0.99

Th 6.26 19.00 8.75 0.23 28.33 18.50 14.30

U 2.24 11.90 2.65 0.15 27.78 24.38 5.41

7
Table 1 (continued). Whole-rock geochemical analyses from Activation Laboratories, Ancaster, Ontario, Canada, of 

mineralized and associated unmineralized argillite, Bonnifield district, Alaska. 

Sample

Setting

Lithology

Wt. %

SiO2

Al2O3

Fe2O3T

MnO

MgO

CaO

Na2O

K2O

TiO2

P2O5

LOI

Total

Total C

Graphitic C

Organic C

TOC

CO2

S

SO4

F

ppm

Br

Be

V

Sc

Ga

Ge

Rb

Sr

Cr

Zr

Hf

Nb

Ta

Co

Ni

Cu

Zn

Cd

Pb

Sb

As

Bi

DC98-52-538 97ADb58d1 WTF82-5-

278.0

WTF82-5-278.4 WTF82-5-365 WTF82-5-366 WTF82-8-436

Lago Ck zone WTF WTF WTF WTF WTF WTF

gray graphitic 

argillite with felsic 

clasts; minor py & 

sl

siliceous MS; 

major py & sl; 

minor gn

gray argillite gray argillite; 

minor py

gray dolomitic(?) 

argillite; felsic 

clasts

gray graphitic 

argillite; minor py

gray graphitic 

argillite 

69.93 67.23 62.29 64.53 74.16 77.4 62.97

11.1 1.51 14.9 14.36 10.4 6.4 16.25

2.81 12.99 4.76 4.96 2.39 2.92 5.19

0.015 0.056 0.05 0.069 0.016 0.009 0.02

1.26 0.96 2.46 2.94 1.38 0.8 2.91

0.53 0.28 0.32 0.29 0.8 1.3 0.34

3.22 0.06 3.28 3.19 2.84 3.26 2.77

4.01 0.13 5.35 4.92 1.96 1.92 4.02

0.425 0.064 0.729 0.686 0.247 0.188 0.783

0.41 0.18 0.24 0.21 0.15 0.78 0.23

5.82 7.94 4.43 3.95 5.47 5.23 4.52

99.55 91.4 98.8 100.1 99.81 100.2 99.99

2.5 0.06 0.33 0.28 0.72 2.13 0.44

2.17 < 0.05 0.3 0.26 0.3 1.81 0.43

0.37 < 0.05 0.05 <0.05 <0.05 0.15 <0.05

2.54 <0.05 0.35 0.26 0.3 1.96 0.43

<0.05 0.05 <0.05 <0.05 1.39 0.62 <0.05

1.1 7.37 1.39 0.63 0.73 2.1 0.47

0.21 0.16 0.14 0.17 0.13 0.29 0.1

0.18 0.03 0.13 0.12 0.13 0.17 0.11

<0.5 < 0.5 <0.5 <0.5 <0.5 <0.5 <0.5

9 < 1 2 2 7 5 3

1180 46 219 190 24 133 233

7 1.4 13 13 <1 5 14

24 3 22 21 36 15 24

1.1 0.6 1.3 1.4 1.7 <0.5 1.7

178 6 189 184 87 82 162

27 6 41 36 137 142 41

177 44 87 81 15 56 93

390 22 148 136 1490 252 150

13.6 0.6 4.7 4.1 42.8 7.3 4.5

74.2 1.9 18.7 16.4 220.6 41.9 20.3

6.56 0.14 1.20 1.16 15.55 2.74 1.28

24 25 18 15 <1 3 13

153 7 66 58 10 63 55

58 1020 54 24 14 41 39

2607 58700 439 138 163 307 173

21 425 2 1 1 2 1

111 7820 46 11 23 19 12

20.4 17.1 6.3 4.2 3.2 9.7 2.4

112 287 20.6 14.9 9.3 47.4 11

<0.1 6.20 1.58 1.47 2.52 <0.1 1.20

8
Table 1 (continued). Whole-rock geochemical analyses from Activation Laboratories, Ancaster, Ontario, Canada, of 

mineralized and associated unmineralized argillite, Bonnifield district, Alaska. 

Sample

Tl

Mo

Se

Ag

Au ppb

Hg ppb

Ir ppb

In

Sn

W 

Cs

Ba

Y

La

Ce

Pr

Nd

Sm

Eu

Gd

Tb

Dy

Ho

Er

Tm

Yb

Lu

Th

U

DC98-52-538 97ADb58d1 WTF82-5-

278.0

WTF82-5-278.4 WTF82-5-365 WTF82-5-366 WTF82-8-436

2.80 0.12 2.53 2.69 2.42 1.44 1.91

48 3 2 4 <1 25 <1

12 17 <3 <3 <3 7 <3

1.4 7.0 <0.3 <0.3 1.9 1.9 <0.3

9 340 4 <2 <2 <2 <2

2500

<5 < 5 <5 <5 <5 <5 <5

<0.1 0.30 <0.1 <0.1 0.18 <0.1 <0.1

3.79 3.00 1.74 1.80 13.95 1.42 2.32

8.34 0.90 2.53 2.96 1.70 1.39 1.71

10.46 0.40 5.48 5.37 4.83 4.26 4.72

1470.00 248.00 3900.00 3680.00 6200.00 6050.00 2790.00

66.02 6.60 24.31 22.62 163.14 49.19 22.53

143.63 7.08 45.37 40.48 198.76 42.44 48.78

236.89 12.00 78.08 67.49 365.36 70.11 84.21

28.22 1.42 9.32 7.84 43.17 8.32 9.92

100.82 4.94 35.15 28.79 162.50 31.60 36.50

18.91 1.07 6.43 5.33 34.96 6.96 6.65

1.76 0.19 1.28 1.21 1.82 0.85 1.29

15.56 0.91 5.42 4.70 32.09 7.19 5.47

2.34 0.15 0.86 0.77 6.00 1.35 0.84

11.75 0.91 4.50 4.10 33.30 7.71 4.28

2.25 0.20 0.87 0.82 6.54 1.57 0.82

7.14 0.63 2.69 2.66 21.06 4.89 2.58

1.04 0.11 0.42 0.39 3.24 0.74 0.40

6.16 0.71 2.66 2.51 19.18 4.43 2.49

0.90 0.11 0.38 0.36 2.62 0.64 0.38

24.50 1.35 13.20 12.32 47.37 12.65 13.83

17.97 1.39 4.13 3.87 12.94 7.65 4.09

9
Table 1 (continued). Whole-rock geochemical analyses from Activation Laboratories, Ancaster, Ontario, Canada, of 

mineralized and associated unmineralized argillite, Bonnifield district, Alaska. 

Sample

Setting

Lithology

Wt. %

SiO2

Al2O3

Fe2O3T

MnO

MgO

CaO

Na2O

K2O

TiO2

P2O5

LOI

Total

Total C

Graphitic C

Organic C

TOC

CO2

S

SO4

F

ppm

Br

Be

V

Sc

Ga

Ge

Rb

Sr

Cr

Zr

Hf

Nb

Ta

Co

Ni

Cu

Zn

Cd

Pb

Sb

As

Bi

WTF82-8-449 04ADb08 97ADb62 97ADb65b 05ADb05b

WTF North of WFT 

(Mystic Ck Mbr.?)

AM AM AM

gray graphitic 

argillite; minor py

gray phyllite MS; major py, sl 

& cp; minor gn

MS; major sl & 

gn; minor cp 

dolomitic MS; 

major py & cp 

66.04 72.33 16.1 20.01 22.88

12.7 11.98 0.43 0.23 10.15

5.75 2.58 46.12 14.19 28.72

0.064 0.02 0.057 0.075 0.283

2.82 1.85 0.65 0.38 10.89

0.26 0.09 0.05 0.05 4.2

3.26 3.26 0.1 0.09 0.21

3.96 3.55 0.04 0.04 0.31

0.843 0.54 0.013 0.014 0.498

0.2 0.19 < 0.01 < 0.01 0.12

4.1 3.59 23.79 15.54 17.47

99.99 99.98 87.35 50.61 95.73

0.53 0.52 0.66 0.55 3.56

0.5 0.47 < 0.05 < 0.05 < 0.05

<0.05 <0.05 < 0.05 < 0.05 < 0.05

0.5 0.47 <0.05 <0.05 <0.05

<0.05 0.07 2.04 1.63 13.6

1.07 0.13 39.6 27.6 8.33

0.13 0.10 0.08 2.84 9.53

0.11 0.08 < 0.01 < 0.01 0.16

<0.5 <0.5 < 0.5 < 0.5 < 0.5

2 3 < 1 < 1 < 1

309 261 19 6 29

12 0.8 0.6 13.7

19 18 12 14 14

1.3 1.4 0.7 0.7 < 0.5

151 149 2 < 1 9

31 17 5 3 98

65 58 < 5 < 5 10

133 110 8 8 268

3.8 3.2 0.2 0.2 7.1

20.1 12.5 1.0 0.7 17.3

1.28 0.88 0.05 0.57 1.30

17 <1 64 16 28

76 28 69 67 5

11 33 37500 5620 11100

72 40 83800 321000 4720

1 0.6 273 980 14

19 10 11300 88800 3100

3.1 4.2 96.3 516 40.5

23.3 19.5 1350 953 78.3

2.95 0.6 2250 869 198

10
Table 1 (continued). Whole-rock geochemical analyses from Activation Laboratories, Ancaster, Ontario, Canada, of 

mineralized and associated unmineralized argillite, Bonnifield district, Alaska. 

Sample

Tl

Mo

Se

Ag

Au ppb

Hg ppb

Ir ppb

In

Sn

W 

Cs

Ba

Y

La

Ce

Pr

Nd

Sm

Eu

Gd

Tb

Dy

Ho

Er

Tm

Yb

Lu

Th

U

WTF82-8-449 04ADb08 97ADb62 97ADb65b 05ADb05b

1.71 1.53 1.2 9.52 0.23

7 <1 21 39 2

<3 <3 111 104 25

<0.3 0.4 76.7 151 9.4

<2 12 365 474 20

33600 94100 1780

<5 <5 < 5 < 5 < 5

<0.1 <0.1 5.60 3.70 1.30

1.72 2 171.00 422.00 17.00

2.73 1.1 1.10 2.00 5.50

3.80 2.5 < 0.1 0.20 0.70

4420.00 2500 18.00 11.00 78.00

20.79 17.1 1.80 1.30 38.50

23.81 34.4 1.14 0.77 43.70

41.18 56.9 2.27 1.50 89.70

5.03 6.80 0.25 0.17 10.50

19.28 25.1 1.00 0.67 40.30

4.11 4.59 0.24 0.16 8.27

1.01 0.9840 0.05 0.03 1.18

4.10 3.72 0.31 0.22 7.80

0.68 0.60 0.06 0.04 1.41

3.59 3.04 0.35 0.23 7.79

0.69 0.59 0.07 0.04 1.42

2.17 1.90 0.19 0.13 4.02

0.32 0.286 0.03 0.02 0.61

2.12 1.81 0.17 0.11 3.65

0.31 0.274 0.03 0.02 0.50

10.12 9.84 0.40 0.34 15.50

5.60 4.58 1.06 4.07 3.35

11
Table 2. Whole-rock metal contents for Bonnifield samples in which Zn, Pb, or Cu are >1,000 ppm or Ag content is >20 ppm

12

Sample Source From 

(ft)

To (ft) Deposit or Zone Sb 

(ppm)

Au 

(ppb)

Ag 

(ppm)

Cu 

(ppm)

Pb (ppm) Zn (ppm) As 

(ppm)

Cd 

(ppm)

Hg 

(ppb)

Mn 

(ppm)

Sn 

(ppm)

DC98-52 Grayd Res. 313 343 Lago Ck 2 <5 <0.2 8 22 2780 6 1.5 3 950

DC98-52 Grayd Res. 343 377.5 Lago Ck 6 <5 <0.2 32 10 5850 36 2 3 5380

DC98-52 Grayd Res. 426 453 Lago Ck 26 320 62.4 471 7960 19,400 510 68 8790 215

DC98-52 Grayd Res. 453 495.5 Lago Ck 14 65 14 1370 22600 45600 158 135.5 8800 325

DC98-52 Grayd Res. 495.5 525 Lago Ck 8 45 5 40 588 3380 80 11 1850 85

DC98-52 Grayd Res. 525 542 Lago Ck 4 <5 0.8 25 78 2180 92 3 310 245

DC99-62 Grayd Res. 539 546.5 Fosters/Disc. <2 <5 <0.2 3 6 1190 10 1 80 350

DC99-62 Grayd Res. 593 614 Fosters/Disc. 10 120 3 30 1115 2600 188 4.5 2580 45

DC99-62 Grayd Res. 614 636 Fosters/Disc. <2 <5 0.4 18 56 1540 18 1.5 210 1810

DC99-62 Grayd Res. 652 660.5 Fosters/Disc. 2 5 0.6 94 8 1050 26 <0.5 60 1810

DC99-62 Grayd Res. 660.5 667 Fosters/Disc. 160 135 7363 656 7640 24600 614 70 15960 1495

DC99-62 Grayd Res. 667 672 Fosters/Disc. 68 500 51.2 300 6440 21800 548 46.5 10080 360

DC99-66 Grayd Res. 439 444 Fosters/Disc. <2 5 <5 13 44 1665 6 3.5 <1 350

DC99-66 Grayd Res. 519 524 Fosters/Disc. <2 30 0.8 459 1235 5510 40 15.5 1 715

DC99-66 Grayd Res. 529 534 Fosters/Disc. <2 5 0.6 220 1285 7690 50 24 3 675

DC99-66 Grayd Res. 534 538 Fosters/Disc. <2 <5 <0.2 114 422 5550 16 16.5 1 1115

DC99-66 Grayd Res. 538 541 Fosters/Disc. 12 25 3.2 82 274 4780 44 12.5 3 930

DC99-66 Grayd Res. 541 544 Fosters/Disc. 256 200 154.1 620 6380 20300 370 39.5 18 275

DC99-66 Grayd Res. 558 561.1 Fosters/Disc. 20 75 10 575 12100 28800 156 74.5 4 620

DC99-66 Grayd Res. 561.1 564 Fosters/Disc. 2 25 3 700 7200 21800 42 23.5 1 4270

DC99-66 Grayd Res. 564 567 Fosters/Disc. 2 5 1.2 497 4100 15800 14 37 1 950

DC99-66 Grayd Res. 567 570 Fosters/Disc. 8 75 5.2 1150 10100 20000 28 41.5 <1 1905

DC99-66 Grayd Res. 570 573 Fosters/Disc. 100 130 9.2 574 4800 12500 432 25 <1 550

DC99-66 Grayd Res. 573 576 Fosters/Disc. 48 165 5.6 139 1200 7200 756 3.5 <1 1070

DC99-66 Grayd Res. 576 579 Fosters/Disc. 60 95 6.8 157 80 4600 822 4.5 <1 370

DC99-66 Grayd Res. 579 582 Fosters/Disc. 34 155 5.6 184 2100 8100 804 14 <1 665

DC99-66 Grayd Res. 582 585 Fosters/Disc. 18 166 4.8 630 10000 28400 630 51 1 2590

DC99-66 Grayd Res. 585 588 Fosters/Disc. 10 100 7.6 1290 18800 43500 126 119.5 1 205

DC99-66 Grayd Res. 588 593 Fosters/Disc. 6 20 1.2 180 3840 7360 52 21.5 <1 45

DC99-66 Grayd Res. 593 596 Fosters/Disc. 94 25 4.4 2390 12500 20600 68 53.5 <1 45

DC99-66 Grayd Res. 596 599 Fosters/Disc. 52 10 3.6 2080 13400 80700 36 194 <1 55

DC99-66 Grayd Res. 599 604 Fosters/Disc. 8 40 2.4 250 6700 15000 82 36 <1 55

DC99-66 Grayd Res. 604 609 Fosters/Disc. 6 10 2.4 230 7930 14400 48 38 <1 75

DC99-66 Grayd Res. 609 614 Fosters/Disc. 10 25 4 869 9640 20200 78 56.5 <1 135

DC99-66 Grayd Res. 651 656 Fosters/Disc. 68 70 15.8 253 7070 9160 498 34.5 5 80

DC99-66 Grayd Res. 656 661 Fosters/Disc. 74 80 15 149 3760 9520 506 31 5 35

DC99-66 Grayd Res. 661 666 Fosters/Disc. 70 65 9.4 149 2100 3990 182 26.5 2 75

DC99-66 Grayd Res. 666 671 Fosters/Disc. 34 40 8.4 68 2990 4960 152 16.5 3 45

DC99-66 Grayd Res. 675 680.4 Fosters/Disc. 62 285 26.4 70 30 90 946 1.5 4 105

DC98-59 Grayd Res. 330 336 Fosters 14 50 6.4 31 404 1040 750 3.5 5840 2390

DC98-61 Grayd Res. 37 54 Fosters <2 <5 <0.2 8 22 3070 14 5 <1 675

DC98-61 Grayd Res. 54 90 Fosters <2 <5 <0.2 99 10 6200 <2 18 <1 2670

DC98-61 Grayd Res. 90 106 Fosters <2 <5 <0.2 56 8 1585 2 3 <1 2320

DC98-61 Grayd Res. 111 123 Fosters <2 <5 <0.2 26 6 2130 10 5 <1 2140

DC98-61 Grayd Res. 161 181.5 Fosters 8 <5 <0.2 6 30 2560 28 6 <1 340

DC98-61 Grayd Res. 181.5 205 Fosters <2 <5 <0.2 35 6 3830 <2 6 <1 1430

DC98-61 Grayd Res. 205 230 Fosters <2 <5 <0.2 60 2 2420 18 0.5 <1 1250

DC98-61 Grayd Res. 230 239.5 Fosters 4 <5 <0.2 50 2 3370 <2 <0.5 1 1265

DC98-61 Grayd Res. 239.5 259 Fosters 16 <5 1.2 24 60 3200 442 3.5 <1 690

DC99-63 Grayd Res. 403.5 409 Fosters 10 100 5.2 163 2770 9260 228 29.5 5650 75

DC99-63 Grayd Res. 434 439 Fosters 78 145 31.8 167 2900 6150 448 11.5 8170 330

DC99-63 Grayd Res. 439 444 Fosters 316 220 167 537 4080 8830 454 20 9980 825

DC99-63 Grayd Res. 444 449 Fosters 54 70 16 49 494 1485 1095 3.5 3550 1485

DC99-63 Grayd Res. 454 459 Fosters 72 320 49 43 254 556 1635 0.5 21600 205

DC99-63 Grayd Res. 459 464 Fosters 36 160 41.2 37 228 848 1125 2 1940 80

 [ “Grayd Res.” = data provided by Hans Smit of Grayd Resource Corp.; samples with a DC98 prefix were analyzed by Acme Laboratories and those with a DC99 

prefix were analysed by Chemex Laboratories, both in Vancouver, B.C., Canada. Methods of analysis for Grayd samples: those analyzed by Acme Labs used aqua 

regia digestion with ICP-MS instrumentation; those analyzed by Chemex used aqua regia digestion with an ICP-AES scan or AAS for % Pb or Zn, and Ag reported in 

oz/T was determined by FA-gravimetric. “Chemex” = samples submitted by C. Dusel-Bacon to Chemex Laboratories, and “ACT” = samples submitted by J.F. Slack to 

Activation Laboratories; methods of analysis for those samples are given in Appendix. AM = Anderson Mountain deposit; Ck = Creek; DC = Dry Creek deposit; Disc. 

= Discovery zone; E = east; Fosters = Fosters Creek zone; N = north; W = west; and WTF = West Tundra Flats deposit. All zones are in the Dry Creek deposit. 

Sample locations shown on Sample Location Map. Blank cells indicate that no analysis was made for that element]
Table 2 (continued). Whole-rock metal contents for Bonnifield samples in which Zn, Pb, or Cu are >1,000 ppm or 

Ag content is >20 ppm

13

Sample Source From 

(ft)

To (ft) Deposit or Zone Sb 

(ppm)

Au 

(ppb)

Ag 

(ppm)

Cu 

(ppm)

Pb (ppm) Zn (ppm) As 

(ppm)

Cd 

(ppm)

Hg 

(ppb)

Mn 

(ppm)

Sn 

(ppm)

DC99-63 Grayd Res. 464 469 Fosters 28 220 23.6 35 176 406 738 0 1410 255

DC99-63 Grayd Res. 469 475 Fosters 28 85 8.8 482 >10000 >10000 310 53.5 4240 950

DC99-64 Grayd Res. 401 406 Fosters 4 25 1.8 12 242 1095 108 2 680 480

DC99-64 Grayd Res. 406 411 Fosters 8 0 1.4 16 1560 3900 18 13 2270 3270

DC99-64 Grayd Res. 411 416 Fosters 30 0 0.6 71 900 >10000 0 46.5 7620 6000

DC99-64 Grayd Res. 416 421 Fosters 38 0 3.6 78 7520 >10000 2 63.5 9530 2950

DC99-64 Grayd Res. 421 426 Fosters 18 15 1.2 48 436 4060 40 11 2650 3760

DC99-64 Grayd Res. 426 432 Fosters 96 240 12.4 515 >10000 >10000 576 70.5 9730 570

DC99-64 Grayd Res. 432 443 Fosters 50 135 6.8 510 6690 >10000 614 44.5 3870 230

DC99-64 Grayd Res. 443 446 Fosters 2 5 0.6 54 790 1600 34 3.5 460 130

DC99-64 Grayd Res. 446 450 Fosters <2 5 0.4 21 334 1005 30 2.5 420 100

DC99-64 Grayd Res. 450 455 Fosters 74 65 9.8 563 8210 >10000 440 46 5120 65

DC99-64 Grayd Res. 455 460 Fosters 30 100 2.6 81 534 1110 836 2.5 1130 60

DC99-64 Grayd Res. 460 463 Fosters 40 215 10.2 100 706 1100 1225 2 1620 140

DC99-64 Grayd Res. 463 463 Fosters 96 320 39.2 2110 >10000 >10000 594 140 11680 160

DC99-64 Grayd Res. 463 482 Fosters 84 330 75.2 9280 >10000 >10000 564 500 39300 1295

DC99-64 Grayd Res. 463 463 Fosters 76 335 24.8 1350 >10000 >10000 772 74.5 6430 155

DC99-64 Grayd Res. 463 463 Fosters 166 440 32.2 905 7870 >10000 980 45 4500 155

DC99-64 Grayd Res. 482 487 Fosters 10 30 7 1185 >10000 >10000 118 169 7950 95

DC99-64 Grayd Res. 486 490 Fosters 8 20 3 512 8640 >10000 52 74 3890 80

DC99-64 Grayd Res. 490 496 Fosters 10 40 2.6 323 4700 9280 66 27 4650 65

DC98-58 Grayd Res. 330 379 Discovery <2 <5 0.4 40 18 2060 <2 6 <1 515

DC98-58 Grayd Res. 605 632 Discovery 14 <5 0.2 10 34 1180 92 1.5 <1 260

DC98-58 Grayd Res. 663 694 Discovery 14 135 4 65 270 1790 252 2.5 <1 90

DC99-75 Grayd Res. 450 469 DC South <2 <5 0.8 203 1445 4200 34 12 <1 215

DC99-75 Grayd Res. 495 532 DC South <2 <5 0.2 50 576 1480 6 4.5 <1 180

DC99-74 Grayd Res. 90 115 DC South 8 <5 0.6 183 1140 2200 12 8.5 <1 630

DC99-74 Grayd Res. 115 118 DC South <2 15 <0.2 77 574 1820 16 5.5 <1 320

DC99-74 Grayd Res. 118 121 DC South 18 20 7.6 3360 16600 24000 34 71.5 4 240

DC99-74 Grayd Res. 121 124 DC South <2 <5 <0.2 384 1530 5920 16 21 <1 460

DC99-74 Grayd Res. 124 142.5 DC South <2 <5 0.8 343 1850 4800 10 14.5 <1 605

DC99-74 Grayd Res. 142.5 156 DC South 6 <5 <0.2 66 1115 1840 16 5 <1 440

DC99-74 Grayd Res. 199 219 DC South 6 <5 <0.2 14 90 1280 2 2 <1 590

DC99-74 Grayd Res. 219 246 DC South 6 15 <0.2 29 220 1160 16 2 <1 515

DC99-74 Grayd Res. 246 262 DC South 4 <5 0.4 11 378 1030 20 3 <1 85

DC99-65 Grayd Res. 469 474 DC N (W) 18 190 10.2 160 3260 10000 344 38.5 2200 265

DC99-65 Grayd Res. 474 478 DC N (W) 22 215 16.8 547 4250 10000 476 42.5 2790 190

DC99-65 Grayd Res. 478 480.8 DC N (W) 6 55 1.4 98 172 4470 136 14.5 700 170

DC99-65 Grayd Res. 497 500 DC N (W) 38 60 33.8 346 4490 10000 230 33.5 1800 930

DC99-70 Grayd Res. 940 945 DC N (W) 28 120 18.8 82 1190 3020 664 11.5 <1 75

DC99-70 Grayd Res. 945 950 DC N (W) 36 195 46.2 106 864 1990 228 6 <1 1075

DC99-70 Grayd Res. 950 955 DC N (W) 12 690 3.6 65 1900 4400 90 15 1 1740

DC99-70 Grayd Res. 955 960 DC N (W) 8 75 15.2 77 2460 5750 180 20 <1 675

DC99-73 Grayd Res. 368.5 370 DC N (W) 162 50 123.3 1210 7380 23500 556 54 <1 460

DC99-73 Grayd Res. 495 498 DC N (W) 8 60 7.8 79 1340 4560 170 10.5 5 20

DC98-46 Grayd Res. 184 201 DC N (E) 2 25 1.2 1520 94 772 66 2.5 280 25

DC98-46 Grayd Res. 201 257 DC N (E) 2 10 1 288 2850 3590 36 25.5 560 85

DC99-67 Grayd Res. 515 540 DC N (E) 4 35 2.4 8950 166 564 108 6 <1 55

DC99-67 Grayd Res. 575 582 DC N (E) <2 <5 2.2 2140 36 316 32 0.5 <1 5

DC99-67 Grayd Res. 582 590 DC N (E) <2 <5 1.4 1590 480 4460 16 11 <1 25

DC99-67 Grayd Res. 590 593 DC N (E) <2 <5 1.4 292 60 4830 20 13 <1 45

DC99-67 Grayd Res. 593 600 DC N (E) <2 <5 1.8 372 216 9710 34 29 <1 80

DC99-67 Grayd Res. 600 610 DC N (E) 2 <5 1 210 316 6070 50 18 <1 85

DC99-67 Grayd Res. 610 620 DC N (E) 4 <5 1.2 185 1335 4550 64 14 <1 75

DC99-67 Grayd Res. 620 631 DC N (E) 6 35 2.2 242 1570 >10000 152 32.5 <1 50

DC99-67 Grayd Res. 636 683 DC N (E) 2 15 1.2 39 2420 5660 64 18 <1 20

DC99-69 Grayd Res. 976 980 DC N 10 25 5.8 107 1925 5350 240 17 2 905

DC99-69 Grayd Res. 980 984 DC N 40 10 13 296 3900 13600 476 52 5 195

DC99-69 Grayd Res. 984 989 DC N 60 30 31.8 209 5290 15800 524 35 11 490
Table 2 (continued). Whole-rock metal contents for Bonnifield samples in which Zn, Pb, or Cu are >1,000 ppm or 

Ag content is >20 ppm

14

Sample Source From 

(ft)

To (ft) Deposit or Zone Sb 

(ppm)

Au 

(ppb)

Ag 

(ppm)

Cu 

(ppm)

Pb (ppm) Zn (ppm) As 

(ppm)

Cd 

(ppm)

Hg 

(ppb)

Mn 

(ppm)

Sn 

(ppm)

DC99-69 Grayd Res. 989 1000 DC N 6 10 2.8 22 606 1790 150 5.5 1 420

DC99-69 Grayd Res. 1000 1005 DC N 36 55 11.6 588 7240 37000 344 103.5 12 695

DC99-69 Grayd Res. 1015 1039 DC N <2 5 0.6 94 802 3820 56 10 <1 2320

DC99-69 Grayd Res. 1039 1055 DC N <2 5 0.2 41 946 2050 54 6 <1 30

DC99-69 Grayd Res. 1055 1060 DC N <2 <5 1.4 307 4180 6600 20 21 <1 25

DC99-69 Grayd Res. 1060 1082 DC N <2 <5 0.2 194 1125 3610 16 11 <1 60

DC99-69 Grayd Res. 1082 1100 DC N <2 15 0.8 13 50 1515 26 4 <1 245

DC99-69 Grayd Res. 1100 1105 DC N 4 15 0.8 683 842 9410 84 32 <1 225

DC99-69 Grayd Res. 1105 1138 DC N 2 5 0.8 8 56 1175 148 0.5 <1 535

DC99-69 Grayd Res. 1138 1157 DC N <2 <5 0.6 14 1720 2150 <2 6 <1 1440

DC99-69 Grayd Res. 1157 1162 DC N 2 <5 1.2 1625 122 968 38 3 <1 20

DC99-69 Grayd Res. 1195 1200 DC N <2 5 4.6 720 4340 37400 28 118 <1 130

DC99-69 Grayd Res. 1200 1204.5 DC N 2 15 4 369 6900 23900 58 76.5 <1 45

DC99-69 Grayd Res. 1204.5 1209 DC N 42 45 4.6 161 5330 11900 126 29.5 <1 55

DC99-69 Grayd Res. 1251 1281 DC N 2 5 <0.2 6 30 1135 2 <0.5 <1 125

97ADb58b Chemex WTF 510 140000

97ADb58d1 Chemex WTF 330 8.6 1740 9440 62500 259 405

97ADb58g Chemex WTF 300 8.4 1915 4410 64400 261 180

97ADb59e Chemex Discovery 3590 311.99 789 168500 326000 500 65

97ADb59h Chemex Discovery 5910 287.99 129000 310000

97ADb61a Chemex DC South 20 7.8 1540 3570 47600 138 1205

97ADb65b Chemex AM 460 106000 342000

97ADb58d1 ACT Lab. WTF 17.1 340 7 1020 7820 58700 287 425 2500 434 3

DC98-52-538 ACT Lab. Lago Ck 20.4 9 1.4 58 111 2607 112 21.3 116 4

DC98-38-237 ACT Lab. Fosters 29.7 0 1.3 38 53 4147 101 33.9 170 10

DC98-41-229 ACT Lab. Fosters 16.4 0 1.3 64 31 1077 69.7 10.2 77 4

97ADb59e ACT Lab. Discovery 307 3460 323 1250 153000 300000 243 1720 33000 39 25

97ADb61a ACT Lab. DC South 16.1 68 10 1880 4140 66700 46.8 326 10100 891 7

05ADb21 ACT Lab. DC South 7.8 9 4 58 1230 1020 191 12 446 23 10

97ADb62 ACT Lab. AM 96.3 365 76.7 37500 11300 83800 1350 273 33600 441 171

97ADb65b ACT Lab. AM 516 474 151 5620 88800 321000 953 980 94100 581 422

05ADb05b ACT Lab. AM 40.5 20 9.4 11100 3100 4720 78.3 14 1780 2192 17
Table 3. Whole-rock geochemical analyses from Chemex Laboratories, Vancouver, B.C., Canada, of mineralized and 

associated unmineralized samples, Bonnifield district, Alaska. 

Sample 97ADb58b 97ADb58d1 97ADb58f 97ADb58g 97ADb58h 03ADb15b 03ADb15c

Setting WTF WTF WTF WTF WTF WTF WTF

Rock type and 

sulfides

MS; major py & 

sl

siliceous MS; 

major py & sl; 

minor gn

siliceous MS; 

major py & sl

siliceous MS; 

major sl & py; 

minor cp & gn

 carbonaceous 

argillite metarhyolite metarhyolite

wt %

SiO2 --- 65.59 --- 69.69 70.13 80.78 78.77

Al2O3 --- 1.76 --- 0.92 13.54 9.05 10.61

TiO2 --- 0.07 --- 0.06 0.66 0.17 0.16

Fe2O3 --- 12.35 --- 10.82 4.16 1.09 0.74

MnO --- 0.06 --- 0.03 0.03 0.01 0.01

CaO --- 0.24 --- 0.05 0.05 0.18 0.07

MgO --- 0.9 --- 0.2 1.58 0.12 0.07

K2O --- 0.17 --- 0.19 3.97 3.27 3.9

Na2O --- 0.02 --- 0.01 0.06 2.62 3.08

P2O5 --- 0.19 --- 0.07 0.15 0.04 0.04

Cr2O3 --- <.01 --- <.01 <.01 0.01 <0.01

LOI --- 8.08 --- 7.88 4.28 1.19 0.6

Total --- 89.43 --- 89.92 98.61 98.53 98.05

S % Total 35.1 12 26.8 12 --- 0.15 0.27

C % Total --- --- --- --- 0.61 --- ---

C % inorganic --- --- --- --- <.05 --- ---

Ag ppm --- 8.6 --- 8.4 0.4 0 0

Ag oz/T

Au ppb 510 330 445 300 <5 <5 <5

Al % --- 0.82 --- 0.44 6.95 4.82 5.38

As ppm --- --- --- --- --- 0 0

Ba ppm --- 70 --- 20 3150 2540 4580

Be ppm --- <.5 --- <.5 2 1.9 1.8

Bi ppm --- 4 --- 6 <2 <2 <2

Ca % --- 0.13 --- 0.03 0.03 0.13 0.05

Cd ppm --- 259 --- 261 1.5 0 0

Co ppm --- 60 --- 84 11 14 11

Cr ppm --- 17 --- 12 84 3 8

Cu ppm --- 1740 --- 1915 35 2 2

Fe % --- 8.37 --- 7.5 2.63 0.74 0.5

K % --- 0.09 --- 0.13 2.78 2.56 3.08

Mg % --- 0.57 --- 0.18 0.91 0.1 0.06

Mn ppm --- 405 --- 180 190 43 27

Mo ppm --- <1 --- <1 3 <1 1

Na % --- 0.01 --- 0.01 0.13 1.82 2.21

Ni ppm --- 5 --- 5 21 <1 <1

P ppm --- 560 --- 220 550 130 100

Pb ppm --- 9440 --- 4410 52 14 10

Pb %

Sb ppm --- --- --- --- --- <5 <5

Sr ppm --- 5 --- 4 21 98 112

Ti % --- 0.03 --- 0.03 0.32 0.09 0.08

V ppm --- 47 --- 30 194 8 3

W ppm --- 370 --- 370 60 140 120

Zn ppm --- 166 11 38

Zn % 14 6.25 6.44

[All analyses by Chemex Labs, Vancouver, B.C., Canada. Analytical methods described in Appendix. Abbreviations: AM = 

Anderson Mountain deposit; Ck = Creek; cp = chalcopyrite; DC = Dry Creek deposit; gn = galena; hydrotherm. alt. = 

hydrothermally altered; Mbr = Member (of Totatlanika Schist Formation); MS = massive sulfide; py = pyrite; sl = sphalerite; 

WTF = West Tundra Flats deposit. Sample locations shown on Sample Locality Map. Samples for which Pb or Zn contents 

were >10,000 ppm were reanalysed (see Appendix) and contents are reported in per cent]

15
Table 3 (continued). Whole-rock geochemical analyses from Chemex Laboratories, Vancouver, B.C., Canada, of mineralized and 

associated unmineralized samples, Bonnifield district, Alaska. 

Sample

Setting

Rock type and 

sulfides

wt %

SiO2

Al2O3

TiO2

Fe2O3

MnO

CaO

MgO

K2O

Na2O

P2O5

Cr2O3

LOI

Total

S % Total

C % Total

C % inorganic

Ag ppm

Ag oz/T

Au ppb

Al %

As ppm

Ba ppm

Be ppm

Bi ppm

Ca %

Cd ppm

Co ppm

Cr ppm

Cu ppm

Fe %

K %

Mg %

Mn ppm

Mo ppm

Na %

Ni ppm

P ppm

Pb ppm

Pb %

Sb ppm

Sr ppm

Ti %

V ppm

W ppm

Zn ppm

Zn %

04ADb11a 04BF44R 97ADb59e 97ADb59h 03BF28R2 97ADb60a 97ADb60c 97ADb60f

WTF WTF Discovery zone Discovery zone Fosters Ck. 

Zone DC South DC South DC South

metarhyolite Fe-stained 

metarhyolite

MS; major sl & 

gn; minor cp & 

gold

MS; major sl & 

gn; minor gold vuggy silica quartz-eye metarhyolite

phyllitic quartzeye metarhyoliteexhalite (?) 

with py

83.58 78.39 18.86 --- 95.34 76.15 83.11 50.76

9.41 10.1 0.14 --- 0.47 10.29 5.89 4.14

0.16 0.16 <.01 --- 0.04 0.35 0.17 0.23

0.35 1.4 5.74 --- 2.05 4.75 4.82 26.4

<0.01 0.01 <.01 --- 0.02 0.01 0.01 <.01

0.04 0.16 0.07 --- 0.14 0.02 0.01 0.01

0.07 0.06 0.02 --- 0.24 0.78 0.22 0.34

0.33 4.7 0.14 --- 0.05 2.81 0.17 1.44

4.77 2.51 0.06 --- 0.01 0.11 2.58 0.11

0.03 0.03 <.01 --- 0.02 0.03 0.01 0.01

0.01 <0.01 <.01 --- <0.01 <.01 <.01 <.01

0.48 1.08 11.91 --- 0.27 3.16 2.19 15.71

99.23 98.6 36.94 --- 98.65 98.46 99.18 99.15

0.01 0.7 26.2 28 0.01 --- --- 21.7

--- --- --- --- --- 0.06 --- ---

--- --- --- --- --- <.05 --- ---

0 0 312 288 0 1.2 0.8 0.4

9.1 8.4

<5 <5 3590 5910 <5 20 <5 10

4.46 5.14 0.05 --- 0.24 5.32 3.12 2.23

0 0 --- --- 0 --- --- ---

470 1580 10 --- 70 140 10 70

3.2 2.7 <.5 --- <0.5 5.5 0.5 2

<2 <2 68 --- <2 <2 <2 <2

0.02 0.1 0.03 --- 0.1 0.01 0.01 <.01

0 0 > 500 --- 0 1 0.5 1.5

12 13 24 --- 26 18 25 109

4 14 <1 --- 13 1 4 1

2 3 789 --- 18 0 4 6

0.22 0.95 4.26 --- 1.41 3.12 3.23 17.55

0.25 3.71 0.03 --- 0.04 2.23 0.14 1.12

0.06 0.05 <.01 --- 0.17 0.46 0.16 0.22

10 33 65 --- 110 40 80 5

<1 2 14 --- 2 13 9 122

3.26 1.74 0.02 --- 0.01 0.23 1.98 0.15

<1 1 34 --- <1 <1 1 3

90 110 <10 --- 10 30 <10 <10

9 20 2 248 130 272

16.85 12.9

<5 <5 --- --- <5 --- --- ---

38 131 <1 --- 9 21 16 13

0.07 0.08 <.01 --- 0.01 0.17 0.07 0.08

2 5 <1 --- 7 7 <1 7

110 120 60 --- 240 140 190 470

9 77 274 428 186 120

32.6 31

16
Table 3 (continued). Whole-rock geochemical analyses from Chemex Laboratories, Vancouver, B.C., Canada, of mineralized and 

associated unmineralized samples, Bonnifield district, Alaska. 

Sample

Setting

Rock type and 

sulfides

wt %

SiO2

Al2O3

TiO2

Fe2O3

MnO

CaO

MgO

K2O

Na2O

P2O5

Cr2O3

LOI

Total

S % Total

C % Total

C % inorganic

Ag ppm

Ag oz/T

Au ppb

Al %

As ppm

Ba ppm

Be ppm

Bi ppm

Ca %

Cd ppm

Co ppm

Cr ppm

Cu ppm

Fe %

K %

Mg %

Mn ppm

Mo ppm

Na %

Ni ppm

P ppm

Pb ppm

Pb %

Sb ppm

Sr ppm

Ti %

V ppm

W ppm

Zn ppm

Zn %

 97ADb61a 03ADb09b1 03ADb09b2 97ADb62 97ADb65b 97ADb65e

DC South Moose Ck Mbr 

South of DC

Moose Ck Mbr 

South of DC AM AM AM

siliceous MS; 

major sl

yellowish green, 

hydrotherm. 

alt.(?) quartzsericite schist

quartz-sericite 

schist

MS; major py; 

minor cp; trace 

gn & sl

MS; py, sl, gn & 

cp

altered 

metarhyolite 

schist

63.22 82.63 79.68 --- --- 76.83

4.63 8.11 11.2 --- --- 11.11

0.14 0.21 0.2 --- --- 0.14

12.67 1.72 0.67 --- --- 2.34

0.18 0.01 0.01 --- --- 0.04

0.01 0.07 0.09 --- --- 0.32

2.88 0.16 0.22 --- --- 2.17

0.41 2.89 4.02 --- --- 2.6

0.05 0.57 0.9 --- --- 0.29

0.01 0.04 0.03 --- --- 0.03

<.01 <0.01 <0.01 --- --- <.01

8.13 1.96 1.34 --- --- 3.36

92.33 98.37 98.36 --- --- 99.23

9.06 0.46 0.01 38.6 25.6 ---

--- --- --- --- --- ---

--- --- --- --- --- ---

7.8 0.7 0 --- --- 0.6

20 7 <5 590 460 <5

2.42 4.16 5.66 --- --- 6.03

--- 18 0 --- --- ---

40 1970 2330 --- --- 2400

0.5 0.7 1 --- --- 1

26 <2 <2 --- --- 4

<.01 0.05 0.06 --- --- 0.24

138 0 0 --- --- 1

22 5 6 --- --- 21

4 4 2 --- --- 8

1540 7 1 --- --- 188

8.51 1.16 0.46 --- --- 1.61

0.33 2.25 3.1 --- --- 1.28

1.81 0.12 0.17 --- --- 1.31

1205 27 31 --- --- 280

3 1 <1 --- --- 1

0.05 0.45 0.64 --- --- 0.29

<1 <1 <1 --- --- 1

<10 120 90 --- --- <10

3570 59 7 --- 114

10.6

--- <5 <5 --- --- ---

8 28 23 --- --- 32

0.03 0.07 0.08 --- --- 0.05

<1 6 7 --- --- 2

180 50 80 --- --- 200

20 17 --- 270

4.76 34.2

17
Table 4. Whole-rock geochemical analyses of mineralized and unmineralized Bonnifield rock samples for which fluorine was analyzed. 

Drill hole Dry Creek 

deposit 

zone

Lab no. From 

(Ft)

To (Ft) Au ppb Ag ppm As ppm Ba ppm Ca % Cd ppm Cu ppm Fe % Hg ppb La ppm Mg % Mn ppm Mo ppm Ni ppm P ppm Pb ppm S% Sb ppm Sr ppm Ti % Zn ppm F ppm

DC99-72 N Fosters 335175 1198.0 1237.0 2 2.82 375 4 0.08 108 150

DC98-61 Fosters 86103 90.0 106.0 <5 <0.2 2 170 0.70 3.0 56 1.52 <1 <10 0.56 2320 3 48 270 8 0.74 2 28 <0.01 1585 600

DC99-75 DC North 335240 90.0 122.0 25 1.38 895 4 0.37 62 600

DC99-72 N Fosters 335164 823.0 857.0 3 1.04 200 10 0.10 24 750

DC98-61 Fosters 86109 230.0 239.5 <5 <0.2 <2 30 0.25 <0.5 50 7.50 1 30 1.19 1265 <1 39 340 2 0.22 4 17 <0.01 3370 810

DC98-61 Fosters 86107 181.5 205.0 <5 <0.2 <2 60 0.56 6.0 35 1.90 <1 10 0.45 1430 <1 57 340 6 0.38 <2 31 <0.01 3830 830

DC98-61 Fosters 86108 205.0 230.0 <5 <0.2 18 60 0.46 0.5 60 1.86 <1 10 0.41 1250 <1 39 290 2 0.15 <2 29 <0.01 2420 830

DC99-72 N Fosters 335166 889.0 992.0 4 1.03 240 12 0.05 24 830

DC98-61 Fosters 86112 277.0 281.0 <5 0.2 44 130 0.17 <0.5 7 2.53 <1 50 0.56 100 3 21 80 72 1.31 6 16 <0.01 120 850

DC99-72 N Fosters 335168 953.0 1040.0 35 2.98 190 12 0.57 152 980

DC99-72 N Fosters 335169 1040.0 1065.0 22 3.13 345 12 0.17 92 980

DC98-58 Discovery 85806 289.0 330.0 <5 <0.2 <2 160 1.79 2.0 51 3.36 <1 10 1.17 375 <1 35 700 16 0.55 <2 138 <0.01 766 1060

DC99-72 N Fosters 335167 992.0 949.0 3 1.31 100 18 0.16 26 1060

DC98-58 Discovery 85805 255.0 289.0 <5 0.2 10 230 1.87 0.5 26 2.61 <1 <10 0.97 355 1 25 800 18 0.56 <2 159 <0.01 352 1080

DC99-74 DC South 335223 115.0 118.0 15 <0.2 16 20 0.07 5.5 77 2.51 <1 410 0.26 320 10 4 <10 574 2.02 <2 10 <0.01 1820 1100

DC98-61 Fosters 86104 111.0 123.0 <5 <0.2 10 90 0.17 5.0 26 2.18 <1 10 0.63 2140 <1 54 210 6 0.43 <2 12 <0.01 2130 1140

DC99-75 DC North 335250 340.0 360.0 2 1.97 255 26 0.53 214 1160

DC99-75 DC North 335194 450.0 469.0 <5 0.8 34 80 <0.01 12.0 203 2.92 <1 60 0.75 215 4 1 <10 1445 2.41 <2 2 <0.01 4200 1160

DC98-61 Fosters 86114 301.0 321.0 <5 <0.2 4 140 0.14 <0.5 3 2.63 <1 60 1.24 140 <1 1 10 2 0.13 <2 11 <0.01 164 1200

DC99-72 N Fosters 335165 857.0 889.0 7 0.79 100 26 0.03 26 1200

DC99-72 N Fosters 335170 1065.0 1091.0 9 2.48 280 8 0.12 188 1200

DC99-74 DC South 335236 310.0 329.0 <5 0.2 26 30 0.05 1.0 4 4.18 <1 50 0.29 75 11 <1 <10 40 4.49 2 6 <0.01 376 1200

DC99-74 DC South 335238 350.0 370.0 15 3.4 82 10 0.03 1.0 7 6.47 <1 40 0.05 15 12 <1 <10 48 >5.00 4 9 <0.01 480 1200

DC99-75 DC North 335239 60.0 90.0 32 1.46 715 2 0.33 56 1260

DC99-74 DC South 335224 118.0 121.0 20 7.6 34 30 0.08 71.5 3360 4.16 4 260 0.22 240 58 3 20 16600 >5.00 18 9 <0.01 24000 1280

DC99-74 DC South 335230 176.0 199.0 <5 <0.2 2 40 0.31 0.5 8 2.68 <1 20 0.84 720 4 <1 60 66 1.52 <2 7 <0.01 650 1300

DC99-75 DC North 335249 320.0 340.0 3 1.62 90 10 0.61 48 1300

DC99-72 N Fosters 335177 1262.0 1287.0 85 2.72 1980 40 1.89 126 1330

DC99-75 DC North 335243 196.0 221.0 13 1.41 45 52 1.24 310 1330

DC99-75 DC North 335244 221.0 239.0 23 1.80 90 52 1.44 294 1340

DC99-74 DC South 335237 329.0 350.0 5 1.0 60 40 1.26 2.0 5 4.50 <1 60 0.69 1020 12 <1 <10 26 3.62 6 21 <0.01 706 1350

DC98-58 Discovery 85801 186.0 199.0 <5 <0.2 <2 190 1.33 <0.5 4 1.31 <1 10 0.47 375 <1 4 520 12 0.34 <2 82 <0.01 220 1360

DC99-72 N Fosters 335163 793.0 823.0 7 1.55 200 18 0.36 34 1360

DC98-58 Discovery 85807 330.0 379.0 <5 0.4 <2 180 2.10 6.0 40 3.59 <1 50 1.51 515 1 38 460 18 1.44 <2 97 <0.01 2060 1400

DC99-75 DC North 335200 623.0 630.0 7 3.16 225 16 1.91 212 1400

DC99-75 DC North 335248 285.0 320.0 4 2.26 155 14 1.14 100 1420

DC98-61 Fosters 86102 54.0 90.0 <5 <0.2 <2 240 0.39 18.0 99 2.22 <1 50 0.56 2670 <1 59 260 10 0.57 <2 24 <0.01 6200 1450

DC99-74 DC South 335231 199.0 219.0 <5 <0.2 2 30 0.41 2.0 14 3.82 <1 80 0.90 590 11 1 <10 90 2.57 6 7 <0.01 1280 1500

DC99-74 DC South 335232 219.0 246.0 15 <0.2 16 20 0.21 2.0 29 3.10 <1 30 0.65 515 3 <1 <10 220 1.99 6 4 <0.01 1160 1500

DC99-75 DC North 335198 566.0 595.0 31 3.40 810 374 2.80 716 1500

DC99-75 DC North 335199 595.0 623.0 23 3.96 485 92 2.99 914 1560

DC99-75 DC North 335246 260.0 275.0 7 1.86 190 18 0.78 214 1570

DC99-75 DC North 335197 532.0 566.0 6 1.88 75 12 1.69 106 1580

DC98-58 Discovery 85802 199.0 217.0 <5 <0.2 8 450 1.89 <0.5 4 1.24 <1 10 0.22 405 <1 8 500 82 0.38 <2 142 <0.01 182 1600

DC99-74 DC South 335226 124.0 142.5 <5 0.8 10 50 0.01 14.5 343 3.55 <1 160 0.33 605 23 3 <10 1850 3.50 <2 4 <0.01 4800 1600

DC99-74 DC South 335235 285.0 310.0 <5 0.4 74 20 0.28 <0.5 4 6.45 <1 70 0.44 150 14 <1 <10 26 >5.00 8 13 <0.01 144 1600

DC99-75 DC North 335245 239.0 260.0 9 1.47 175 10 0.77 58 1600

DC99-75 DC North 335193 425.0 450.0 32 2.41 175 60 1.75 336 1620

DC98-58 Discovery 85804 239.0 255.0 <5 <0.2 6 240 0.97 <0.5 4 1.09 <1 10 0.37 220 1 3 590 32 0.39 <2 67 <0.01 180 1630

DC98-58 Discovery 85803 217.0 239.0 <5 <0.2 4 220 0.89 <0.5 5 1.37 <1 20 0.36 250 1 5 620 22 0.19 <2 65 <0.01 154 1670

DC99-74 DC South 335233 246.0 262.0 <5 0.4 20 30 0.02 3.0 11 2.75 <1 50 0.43 85 10 <1 <10 378 2.44 4 4 <0.01 1030 1670

[Analyses shown in order of increasing F content. Data provided by Hans Smit of Grayd Resource Corporation. Samples with a DC98 prefix were analyzed by Acme Laboratories and those with a DC99 prefix were analyzed by Chemex Laboratories, both in Vancouver, B.C., Canada. 

Methods of analysis used by Acme Laboratories: aqua regia digestion with ICP-MS instrumentation; for F analysis, sample was mixed with 1:1 NaOH and then fused and analyzed by ion selective electrode. Methods of analysis used by Chemex Laboratories: aqua regia digestion with 

ICP-AES instrumentation; for F analysis, sample was prepared by carbonate-nitrate fusion and analyzed by ion selective electrode. N = north; and DC = Dry Creek. Sample locations shown on Sample Location Map. Blank cells indicate that no analysis was made for that element]

18
Table 4 (continued). Whole-rock geochemical analyses of mineralized and unmineralized Bonnifield rock samples for which fluorine was analyzed. 

Drill hole Dry Creek 

deposit 

zone

Lab no. From 

(Ft)

To (Ft) Au ppb Ag ppm As ppm Ba ppm Ca % Cd ppm Cu ppm Fe % Hg ppb La ppm Mg % Mn ppm Mo ppm Ni ppm P ppm Pb ppm S% Sb ppm Sr ppm Ti % Zn ppm F ppm

DC99-72 N Fosters 335174 1177.0 1198.0 7 1.81 120 14 0.17 138 1700

DC99-75 DC North 335189 495.0 532.0 <5 0.2 6 70 0.08 4.5 50 2.59 <1 110 0.38 180 7 2 10 576 2.37 <2 5 <0.01 1480 1700

DC98-61 Fosters 86113 281.0 301.0 <5 <0.2 8 160 0.06 <0.5 3 3.25 <1 90 1.43 135 <1 <1 <10 2 0.23 <2 7 <0.01 276 1720

DC99-75 DC North 335196 469.0 495.0 26 2.30 225 198 1.92 530 1750

DC99-74 DC South 335234 262.0 285.0 <5 <0.2 2 30 0.27 <0.5 3 2.51 <1 160 1.01 140 <1 <1 <10 16 0.62 4 10 <0.01 312 1770

DC99-75 DC North 335242 178.0 196.0 14 1.07 160 40 0.85 528 1800

DC99-75 DC North 335190 360.0 375.0 6 2.70 205 40 1.26 346 1800

DC99-72 N Fosters 335176 1251.0 1262.0 7 0.87 215 20 0.50 6 1830

DC99-75 DC North 335191 375.0 400.0 19 2.99 180 150 1.93 404 1830

DC99-75 DC North 335192 400.0 425.0 8 2.23 320 114 1.18 268 1840

DC99-72 N Fosters 335178 1287.0 1326.0 13 7.04 950 8 0.10 244 1900

DC99-74 DC South 335220 69.0 90.0 <5 <0.2 <2 90 <0.01 4.0 21 2.26 <1 40 1.12 570 3 4 <10 550 0.62 <2 2 <0.01 784 1950

DC99-72 N Fosters 335171 1127.0 1148.0 6 2.31 170 10 0.09 238 1960

DC99-74 DC South 335229 156.0 176.0 <5 <0.2 18 20 0.03 0.5 15 3.30 <1 50 0.81 675 5 <1 <10 192 2.50 <2 2 <0.01 400 2000

DC99-72 N Fosters 335173 1148.0 1177.0 7 1.58 75 12 0.08 102 2080

DC99-74 DC South 335219 50.0 69.0 <5 0.6 16 30 <0.01 4.0 24 2.81 <1 10 0.65 330 8 1 10 466 2.30 <2 1 <0.01 812 2100

DC99-74 DC South 335227 142.5 156.0 <5 <0.2 16 40 0.07 5.0 66 2.80 <1 50 0.33 440 3 4 80 1115 2.71 6 5 <0.01 1840 2100

DC98-58 Discovery 85809 486.0 495.0 <5 <0.2 <2 130 0.61 6.5 54 1.93 <1 150 0.75 135 2 9 60 18 0.71 <2 20 <0.01 622 2120

DC99-75 DC North 335241 162.0 178.0 9 0.99 60 16 0.45 654 2200

DC98-61 Fosters 86110 239.5 259.0 <5 1.2 442 50 0.94 3.5 24 5.32 <1 20 0.28 690 48 113 330 60 4.02 16 50 <0.01 3200 2240

DC98-58 Discovery 85810 505.0 515.0 <5 0.2 <2 60 0.14 1.0 156 3.78 <1 230 0.62 225 3 2 <10 20 2.05 2 9 <0.01 818 2300

DC98-61 Fosters 86111 259.0 277.0 <5 0.2 22 130 1.25 0.5 16 2.96 <1 90 1.70 850 3 34 230 2 0.23 2 53 <0.01 240 2370

DC98-58 Discovery 85808 386.0 395.0 <5 <0.2 4 70 0.14 1.5 180 3.88 <1 220 0.66 225 <1 2 <10 10 1.69 <2 11 <0.01 924 2400

DC99-74 DC South 335222 90.0 115.0 <5 0.6 12 50 0.09 8.5 183 2.91 <1 140 1.24 630 5 5 10 1140 1.42 8 5 <0.01 2200 2400

DC99-75 DC North 335247 275.0 285.0 16 4.41 90 254 3.96 488 2450

DC99-74 DC South 335225 121.0 124.0 <5 <0.2 16 50 0.02 21.0 384 3.80 <1 420 0.63 460 22 3 <10 1530 3.34 <2 9 <0.01 5920 2460

DC98-58 Discovery 85813 637.0 663.0 <5 0.2 <2 180 0.14 3.0 7 1.26 <1 150 0.99 65 9 3 40 14 0.41 <2 12 <0.01 236 2550

DC98-61 Fosters 86101 37.0 54.0 <5 <0.2 14 190 0.18 5.0 8 1.89 <1 150 1.01 675 2 12 70 22 <0.01 <2 25 0.01 3070 3450

DC98-58 Discovery 85814 663.0 694.0 135 4.0 252 70 0.25 2.5 65 2.80 <1 230 0.44 90 17 1 30 270 2.74 14 11 <0.01 1790 3600

DC98-58 Discovery 85812 605.0 632.0 <5 0.2 92 70 0.23 1.5 10 3.45 <1 100 1.32 260 48 25 170 34 2.54 14 9 <0.01 1180 3620

DC98-61 Fosters 86105 141.0 161.0 <5 <0.2 16 40 0.08 0.5 4 2.00 <1 70 0.95 165 5 11 100 18 0.60 4 6 <0.01 864 4120

DC98-61 Fosters 86106 161.0 181.5 <5 <0.2 28 50 0.13 6.0 6 2.45 <1 110 0.66 340 26 26 230 30 1.58 8 11 <0.01 2560 4180

DC98-58 Discovery 85811 586.0 605.0 15 7.0 52 120 0.18 1.0 32 2.41 <1 100 1.86 170 2 1 90 418 1.08 14 11 <0.01 966 4400

19
Table 5. Averages of electron microprobe analyses of sulfide minerals from the Bonnifield district, Alaska.

Sample no. Zone/ 

Deposit

No. anal. 

averaged Cu Pb As Fe S Zn Cd Se Mn Ag Co Sb Ni Hg Sn

DC98-38-208 Fosters 4 0.002 0.058 42.689 36.220 22.059 0.074 0.008 0.000 0.002 0.000 0.054 0.008 0.000

DC98-60-128.9 Fosters 7 0.022 0.052 43.176 35.913 21.793 0.178 0.004 0.000 0.002 0.007 0.043 0.021 0.002 0.000 0.006

97ADb65b AM 4 35.644 0.170 0.001 30.291 35.109 0.165 0.012 0.006 0.025 0.021 0.035 0.006 0.004 0.011 0.095

AM98-1-108 AM 8 35.347 0.138 0.003 30.250 35.130 0.076 0.002 0.004 0.014 0.015 0.037 0.005 0.002 0.000 0.016

AM98-1-201 AM 9 35.472 0.110 0.005 30.203 35.402 0.082 0.006 0.006 0.007 0.009 0.027 0.000 0.012 0.006

AM98-5-212 AM 10 35.012 0.137 0.004 29.786 35.039 0.128 0.008 0.015 0.004 0.011 0.039 0.000 0.001 0.004

DC97-36-190 DC South 22 35.217 0.115 0.002 30.158 35.349 0.127 0.006 0.008 0.008 0.015 0.033 0.005 0.005

DC98-51-379 Lago 7 35.597 0.104 0.006 29.966 35.268 0.051 0.000 0.009 0.005 0.005 0.034 0.007 0.007

DC98-60-128.9 Fosters 9 35.410 0.105 0.008 30.161 35.190 0.081 0.007 0.005 0.007 0.020 0.030 0.000 0.006 0.001 0.088

DC98-60-79 Fosters 4 35.309 0.080 0.003 30.038 35.353 0.143 0.006 0.000 0.011 0.026 0.042 0.001 0.001 0.003 0.036

DC98-60-80 Fosters 3 35.685 0.091 0.003 30.446 35.000 0.106 0.000 0.004 0.006 0.007 0.023 0.000 0.000 0.000 0.010

97ADb58b WTF 6 34.797 0.104 0.002 30.315 35.196 0.143 0.007 0.012 0.008 0.008 0.027 0.005 0.006 0.000

 97ADb58f WTF 3 35.264 0.144 0.000 30.227 35.140 0.162 0.009 0.009 0.003 0.004 0.035 0.003 0.008 0.000 0.009

97ADb58g WTF 7 34.877 0.105 0.001 29.911 35.021 0.564 0.008 0.009 0.010 0.005 0.028 0.000 0.001 0.002

97ADb65b AM 5 0.018 86.215 0.000 0.200 13.105 0.100 0.316 0.085 0.002 0.004 0.031 0.005 0.002 0.020 0.023

AM98-1-201 AM 18 0.099 86.684 0.000 0.220 13.122 0.094 0.370 0.106 0.005 0.076 0.012 0.001 0.013 0.035

DC97-36-190 DC South 4 0.000 87.528 0.000 0.060 13.274 0.011 0.275 0.009 0.003 0.066 0.007 0.012 0.024

DC97-9-170A Discovery 5 0.0336 86.922 0.000 0.003 13.246 0.044 0.280 0.013 0.002 0.099 0.012 0.000 0.014

DC98-38-208 Fosters 19 0.005 87.284 0.000 0.019 13.224 0.121 0.244 0.007 0.007 0.012 0.019 0.005 0.030

DC98-51-379 Lago 11 0.029 86.993 0.000 0.214 13.130 0.125 0.280 0.006 0.009 0.000 0.013 0.006 0.032

DC98-60-128.9 Fosters 12 0.005 87.774 0.000 0.005 13.142 0.044 0.284 0.006 0.009 0.001 0.019 0.009 0.014 0.024 0.011

DC98-60-79 Fosters 11 0.031 87.494 0.000 0.004 13.120 0.065 0.282 0.018 0.005 0.000 0.021 0.001 0.008 0.035 0.019

DC98-60-80 Fosters 3 0.022 87.546 0.000 0.010 13.057 0.054 0.267 0.012 0.001 0.000 0.002 0.008 0.000 0.040 0.019

97ADb58b WTF 10 0.006 87.673 0.000 0.036 13.087 0.200 0.272 0.033 0.004 0.000 0.027 0.013 0.003 0.021

97ADb58f WTF 7 0.017 87.089 0.000 0.104 13.021 0.239 0.281 0.078 0.002 0.004 0.018 0.004 0.007 0.071 0.013

97ADb58g WTF 3 0.000 87.030 0.000 0.016 13.114 0.175 0.271 0.012 0.009 0.022 0.000 0.030 0.023 0.028

97ADb65b AM 15 0.063 0.315 0.578 46.422 53.206 0.106 0.004 0.003 0.048 0.011 0.048 0.030 0.038 0.000 0.009

AM98-1-108 AM 20 0.020 0.190 0.078 46.595 53.670 0.024 0.007 0.019 0.006 0.012 0.059 0.008 0.029 0.000 0.012

AM98-1-201 AM 21 0.179 0.239 0.220 46.374 53.604 0.634 0.004 0.009 0.006 0.013 0.067 0.016 0.015 0.000

AM98-5-212 AM 19 0.126 0.324 0.049 46.066 53.440 0.148 0.003 0.011 0.084 0.017 0.077 0.003 0.005 0.002

DC97-36-190 DC South 67 0.019 0.159 0.008 46.864 54.056 0.108 0.006 0.012 0.004 0.007 0.051 0.005 0.001

DC97-9-170A Discovery 10 0.154 0.209 0.737 46.336 53.665 0.465 0.003 0.008 0.006 0.018 0.045 0.036 0.000

DC98-51-379 Lago 28 0.039 0.181 0.225 46.652 53.752 0.082 0.004 0.005 0.006 0.010 0.049 0.004 0.001

DC98-38-208 Fosters 11 0.023 0.167 0.214 46.879 53.996 0.224 0.006 0.006 0.007 0.008 0.033 0.031 0.004

 [Analytical operating conditions and procedures are given in Appendix. Sample locations shown on Sample Locality Map; complete table of analyses given in Table 6. Abbreviations: AM = Anderson Mountain deposit; WTF = West Tundra Flats; Fosters = Fosters 

Creek zone; Lago = Lago Creek zone; Discovery = Discovery Zone; DC South = Dry Creek South zone. All zones are in the Dry Creek deposit. Analyses made by Robert L. Oscarson and Cynthia Dusel-Bacon. Blank cells indicate that no analysis was made for 

that element]

Average weight percent chalcopyrite

Average weight percent arsenopyrite

Average weight percent pyrite

Average weight percent galena

20
Table 5 (continued). Averages of electron microprobe analyses of sulfide minerals from the Bonnifield district, Alaska.

Sample no. Zone/ 

Deposit

No. anal. 

averaged Cu Pb As Fe S Zn Cd Se Mn Ag Co Sb Ni Hg Sn

DC98-60-128.9 Fosters 10 0.004 0.151 0.022 47.341 53.839 0.090 0.006 0.001 0.004 0.011 0.039 0.004 0.003 0.002 0.010

DC98-60-79 Fosters 10 0.053 0.170 0.063 46.841 53.766 0.149 0.006 0.006 0.006 0.010 0.047 0.006 0.009 0.003 0.004

DC98-60-80 Fosters 3 0.000 0.190 0.038 46.813 53.820 0.310 0.015 0.004 0.004 0.014 0.036 0.006 0.007 0.007 0.004

97ADb58b WTF 18 0.023 0.244 0.246 46.459 53.564 0.099 0.008 0.008 0.006 0.014 0.035 0.012 0.004 0.001

97ADb58f WTF 11 0.044 0.194 0.121 46.526 53.519 0.073 0.006 0.006 0.003 0.009 0.067 0.002 0.010 0.001 0.009

97ADb58g WTF 12 0.007 0.168 0.294 46.312 53.367 0.231 0.008 0.005 0.005 0.006 0.049 0.006 0.005 0.004

97ADb65b AM 10 0.064 0.130 0.004 2.242 33.190 66.783 0.101 0.006 0.003 0.016 0.003 0.008 0.009 0.001 0.010

AM98-1-108 AM 14 0.289 0.111 0.003 1.972 33.152 65.386 0.178 0.005 0.007 0.008 0.011 0.004 0.006 0.015 0.007

AM98-1-201 AM 11 0.095 0.086 0.005 2.061 33.240 66.260 0.077 0.002 0.007 0.021 0.014 0.009 0.007 0.011

AM98-5-212 AM 19 0.503 0.139 0.003 1.987 33.152 63.884 0.123 0.010 0.010 0.015 0.017 0.005 0.005 0.010

DC97-36-190 DC South 21 0.048 0.101 0.005 2.757 33.869 64.762 0.188 0.005 0.021 0.010 0.005 0.010 0.003

DC97-9-170A Discovery 10 0.047 0.122 0.008 1.763 33.815 65.901 0.081 0.008 0.011 0.008 0.010 0.002 0.006

DC98-51-379 Lago 23 0.007 0.100 0.003 1.975 33.772 65.586 0.185 0.004 0.049 0.007 0.010 0.009 0.004

DC98-38-208 Fosters 18 0.013 0.099 0.004 1.857 34.035 65.620 0.145 0.006 0.044 0.015 0.006 0.008 0.004

DC98-60-128.9 Fosters 11 0.004 0.090 0.006 1.790 33.132 66.759 0.170 0.010 0.029 0.013 0.008 0.003 0.006 0.002 0.010

DC98-60-79 Fosters 11 0.235 0.106 0.001 2.368 33.138 65.504 0.173 0.004 0.028 0.012 0.006 0.007 0.006 0.006 0.009

DC98-60-80 Fosters 8 0.016 0.117 0.006 2.727 33.649 65.523 0.165 0.006 0.040 0.000 0.013 0.015 0.003 0.000 0.000

97ADb58b WTF 18 0.017 0.116 0.001 4.740 33.223 62.251 0.223 0.007 0.081 0.016 0.017 0.007 0.005 0.002

97ADb58f WTF 11 0.007 0.139 0.005 4.807 33.203 62.053 0.248 0.003 0.098 0.022 0.012 0.008 0.010 0.003 0.001

97ADb58g WTF 12 0.011 0.109 0.007 5.297 33.225 61.581 0.240 0.006 0.085 0.015 0.015 0.005 0.003 0.006

DC97-9-170A Discovery 13 22.528 0.110 0.187 3.856 23.062 2.764 0.000 0.004 0.006 23.353 0.020 27.045 0.007 0.022

DC98-38-208 Fosters 19 35.173 0.073 2.487 3.962 25.494 3.405 0.010 0.001 0.008 7.115 0.009 25.238 0.002 0.021

DC98-60-79 Fosters 8 39.565 0.073 1.158 3.511 25.702 3.936 0.009 0.000 0.015 0.689 0.016 25.802 0.004 0.008 0.088

Average weight percent tetrahedrite

Average weight percent sphalerite

21
Table 6. Complete electron microprobe analyses of sulfide minerals from the Bonnifield district, Alaska. 

Sample Deposit or 

Zone Min. Analysis No. Cu Pb As Fe S Zn Cd Se Mn Ag Co Sb Ni Hg Sn Total 

DC98-38-208 Fosters asp 127 0 0.046 43.049 36.039 21.752 0 0 0 0 0 0.059 0.015 0 100.96

DC98-38-208 Fosters asp 128 0.003 0.064 42.199 36.548 22.37 0 0.011 0 0 0 0.039 0 0 101.234

DC98-38-208 Fosters asp 129 0 0.071 42.888 36.003 22.01 0 0 0 0 0 0.038 0.016 0 101.026

DC98-38-208 Fosters asp 139 0.004 0.05 42.62 36.288 22.102 0.297 0.022 0 0.007 0 0.08 0 0 101.47

DC98-60-128.9 Fosters asp 116 0.004 0.03 42.92 35.855 21.788 0.104 0 0 0 0 0.05 0.015 0.008 0 0.016 100.79

DC98-60-128.9 Fosters asp 117 0 0.088 43.209 36.283 21.836 0.25 0.001 0 0 0.011 0.056 0.054 0 0 0 101.788

DC98-60-128.9 Fosters asp 119 0 0.076 43.385 35.725 21.777 0.275 0 0 0.007 0.039 0.08 0.008 0 0 0.014 101.386

DC98-60-128.9 Fosters asp 128 0 0.051 43.156 35.9 21.752 0.092 0.009 0 0 0 0.048 0.013 0 0 0 101.021

DC98-60-128.9 Fosters asp 129 0 0.076 43.258 36.036 21.78 0.144 0.005 0 0.002 0 0.033 0 0 0 0 101.334

DC98-60-128.9 Fosters asp 132 0.152 0.031 43.499 35.72 21.519 0.204 0.014 0 0.004 0 0.022 0.032 0 0 0 101.197

DC98-60-128.9 Fosters asp 138 0 0.011 42.804 35.872 22.102 0.177 0 0 0 0 0.009 0.024 0.009 0 0.009 101.017

97ADb65b AM cp 73 35.546 0.185 0.003 30.541 35.342 0.034 0.026 0 0.048 0.031 0.026 0.024 0.016 0.03 0.119 101.971

97ADb65b AM cp 74 36.305 0.163 0 30.43 35.13 0.223 0.01 0.008 0.014 0.042 0.047 0 0 0.012 0.042 102.426

97ADb65b AM cp 88 35.408 0.195 0.002 30.42 34.938 0.361 0.008 0 0.025 0.011 0.03 0 0 0 0.076 101.474

97ADb65b AM cp 92 35.316 0.138 0 29.771 35.027 0.042 0.002 0.015 0.011 0 0.036 0 0 0 0.141 100.499

AM98-1-108 AM cp 66 35.407 0.07 0.02 30.288 35.193 0.078 0 0.009 0.03 0.001 0 0.003 0 0 0 101.099

AM98-1-108 AM cp 69 35.329 0.305 0 30.226 34.922 0.16 0.016 0.007 0.024 0.035 0.026 0.013 0 0 0 101.063

AM98-1-108 AM cp 74 35.099 0.149 0 30.393 35.265 0.018 0 0.006 0 0 0.035 0 0.014 0 0.042 101.021

AM98-1-108 AM cp 75 35.085 0.133 0 30.133 35.106 0.065 0 0 0 0.016 0.023 0 0 0 0.011 100.572

AM98-1-108 AM cp 76 35.435 0.168 0.002 30.508 35.034 0.078 0 0.009 0 0.037 0.061 0.021 0 0 0.01 101.363

AM98-1-108 AM cp 84 35.483 0.081 0 30.175 35.045 0.112 0 0 0.002 0.031 0.09 0 0 0 0 101.019

AM98-1-108 AM cp 91 35.735 0.131 0 29.969 35.227 0.082 0 0 0.016 0 0.024 0 0 0 0.039 101.223

AM98-1-108 AM cp 92 35.199 0.068 0 30.309 35.249 0.015 0 0.004 0.036 0 0.038 0 0 0 0.028 100.946

AM98-1-201 AM cp 88 35.252 0.116 0 29.961 35.163 0.052 0.005 0 0 0 0.045 0 0 0 100.594

AM98-1-201 AM cp 104 35.474 0.1 0 30.154 35.443 0.118 0.005 0.013 0.005 0 0.005 0 0 0 101.317

AM98-1-201 AM cp 107 35.943 0.062 0 30.346 35.343 0.006 0 0.013 0.014 0.029 0.012 0 0 0 101.768

AM98-1-201 AM cp 120 35.121 0.106 0.007 30.666 35.344 0.118 0.012 0.011 0.027 0 0.038 0 0.006 0 101.456

AM98-1-201 AM cp 121 35.775 0.143 0 30.146 35.341 0.03 0 0.003 0 0 0.053 0 0.037 0.028 101.556

AM98-1-201 AM cp 136 35.368 0.123 0.016 30.14 35.273 0 0 0.004 0 0 0.02 0 0.006 0 100.95

AM98-1-201 AM cp 140 35.99 0.075 0 29.89 35.44 0.177 0 0 0 0.045 0.033 0 0.027 0 101.677

AM98-1-201 AM cp 141 34.974 0.139 0.023 30.253 35.311 0.037 0 0 0.01 0 0.029 0 0 0.007 100.783

AM98-1-201 AM cp 146 35.348 0.128 0 30.271 35.962 0.198 0.033 0.007 0.005 0.003 0.009 0 0.028 0.018 102.01

AM98-5-212 AM cp 31 34.965 0.137 0.001 30.085 34.754 0.018 0 0.026 0 0.007 0 0.002 0 0 99.995

AM98-5-212 AM cp 35 34.686 0.107 0.004 29.59 34.89 0.167 0.008 0.002 0.013 0.009 0.034 0 0 0 99.51

AM98-5-212 AM cp 38 35.338 0.11 0.007 29.948 34.908 0 0 0.012 0.002 0 0.051 0 0 0.01 100.386

AM98-5-212 AM cp 39 35.377 0.062 0 29.69 35.057 0 0.005 0.018 0 0.045 0.054 0 0 0 100.308

AM98-5-212 AM cp 46 35.394 0.109 0.006 30.368 35.216 0.062 0.015 0.013 0 0 0.013 0 0 0 101.196

AM98-5-212 AM cp 52 34.676 0.185 0 29.419 35.041 0.308 0.023 0.019 0.015 0 0.033 0 0 0.03 99.749

AM98-5-212 AM cp 59 35.176 0.137 0 29.475 35.155 0.167 0.007 0.028 0 0.034 0.07 0 0 0 100.249

AM98-5-212 AM cp 68 34.999 0.199 0 30.084 35.167 0.031 0 0.028 0 0 0.058 0 0.009 0 100.575

AM98-5-212 AM cp 74 35.06 0.151 0 30.192 35.144 0.384 0 0 0 0 0.046 0 0 0 100.977

AM98-5-212 AM cp 82 34.447 0.171 0.018 29.011 35.061 0.14 0.023 0 0.005 0.013 0.029 0 0 0 98.918

DC97-36-190 DC South cp 46 34.263 0.073 0.01 28.732 34.943 0.098 0.017 0.022 0 0 0 0.024 0 98.182

DC97-36-190 DC South cp 47 35.201 0.162 0 29.444 35.243 0.02 0 0.006 0.005 0.019 0.046 0 0 100.146

DC97-36-190 DC South cp 48 35.375 0.085 0.002 29.474 35.105 0.083 0.029 0.005 0.005 0.001 0.045 0.022 0 100.231

DC97-36-190 DC South cp 79 35.377 0.101 0 30.298 35.132 0.02 0 0.01 0 0 0.05 0 0 100.988

DC97-36-190 DC South cp 80 34.607 0.089 0 30.242 35.419 0.088 0 0 0.002 0.005 0.029 0 0.032 100.513

DC97-36-190 DC South cp 81 35.049 0.111 0.004 30.259 35.629 0.125 0 0.011 0 0.042 0 0 0.008 101.238

DC97-36-190 DC South cp 89 34.641 0.146 0.003 30.872 35.454 0.109 0 0 0.017 0 0.015 0.002 0 101.259

DC97-36-190 DC South cp 90 35.031 0.153 0 30.505 35.238 0.048 0 0 0.007 0.042 0.028 0 0 101.052

[Zone (or deposit) abbreviations as in Table 5; asp = arsenopyrite; cp = chalcopyrite; gn = galena; py = pyrite; sl = sphalerite; td = tetrahedrite. Analyses made by Robert L. Oscarson and Cynthia Dusel-Bacon. Analytical conditions for electron microprobe 

analyses given in Appendix. Sample locations shown on Sample Location Map. Blank cells indicate that no analysis was made for that element]

22
Table 6 (continued). Complete electron microprobe analyses of sulfide minerals from the Bonnifield district, Alaska. 

Sample Deposit or 

Zone Min. Analysis No. Cu Pb As Fe S Zn Cd Se Mn Ag Co Sb Ni Hg Sn Total 

DC97-36-190 DC South cp 93 34.398 0.17 0 30.285 35.209 0.013 0 0 0.035 0.019 0.041 0 0.024 100.194

DC97-36-190 DC South cp 94 35.381 0.101 0.011 30.405 35.335 0.053 0 0.008 0.017 0.01 0.046 0.007 0 101.374

DC97-36-190 DC South cp 111 35.536 0.09 0 30.098 35.453 0.194 0.004 0 0.014 0.011 0 0 0.001 101.401

DC97-36-190 DC South cp 112 35.237 0.116 0 30.177 35.539 0.545 0.02 0 0 0.015 0.026 0.025 0.016 101.716

DC97-36-190 DC South cp 117 35.369 0.141 0 30.266 35.309 0.146 0.007 0.015 0.012 0.024 0.081 0 0 101.37

DC97-36-190 DC South cp 120 35.632 0.152 0 30.274 35.452 0.129 0 0.001 0.019 0 0.031 0.026 0 101.716

DC97-36-190 DC South cp 121 35.43 0.042 0 30.056 35.311 0.282 0.04 0.022 0 0 0.054 0 0 101.237

DC97-36-190 DC South cp 122 35.72 0.112 0.006 30.054 35.515 0.212 0.001 0.023 0.002 0.04 0.037 0 0.023 101.745

DC97-36-190 DC South cp 127 36.158 0.071 0 30.232 35.439 0.123 0.002 0 0 0.004 0.043 0 0 102.072

DC97-36-190 DC South cp 128 35.261 0.127 0 30.187 35.415 0.081 0 0.028 0 0.024 0.018 0 0 101.141

DC97-36-190 DC South cp 139 35.235 0.14 0.004 30.187 35.678 0.079 0.013 0 0 0.041 0.085 0 0 101.462

DC97-36-190 DC South cp 140 35.161 0.098 0 30.493 35.097 0.087 0 0.024 0.02 0.025 0.014 0 0.005 101.024

DC97-36-190 DC South cp 142 35.219 0.146 0.005 30.415 35.471 0.122 0.001 0.006 0 0 0.027 0.01 0 101.422

DC97-36-190 DC South cp 143 35.487 0.103 0 30.512 35.292 0.126 0 0.005 0.022 0 0.02 0 0 101.567

DC98-60-128.9 Fosters cp 114 34.64 0.162 0.002 29.811 35.278 0 0 0 0 0.026 0.082 0 0 0 0.085 100.086

DC98-60-128.9 Fosters cp 115 35.534 0.108 0.008 29.928 35.1 0.139 0.021 0 0.002 0.03 0 0 0.003 0 0.094 100.967

DC98-60-128.9 Fosters cp 120 35.707 0.091 0.016 30.49 35.28 0.143 0 0 0 0 0.031 0 0.038 0 0.124 101.92

DC98-60-128.9 Fosters cp 121 35.397 0.152 0 30.2 35.206 0 0 0 0.011 0 0.031 0 0.008 0 0.116 101.121

DC98-60-128.9 Fosters cp 131 35.427 0.073 0 29.903 35.365 0.043 0 0.02 0.013 0.028 0.066 0 0 0 0.015 100.953

DC98-60-128.9 Fosters cp 139 35.34 0.048 0 30.012 35.191 0.165 0 0.005 0 0.003 0 0.003 0 0 0.035 100.802

DC98-60-128.9 Fosters cp 140 35.322 0.137 0 30.257 35.017 0.123 0.018 0 0.003 0.019 0.056 0 0 0 0.118 101.07

DC98-60-128.9 Fosters cp 146 35.541 0.117 0.027 30.408 35.261 0.074 0.025 0 0.013 0.041 0 0.001 0 0 0.125 101.633

DC98-60-128.9 Fosters cp 147 35.783 0.057 0.015 30.442 35.016 0.045 0.002 0.02 0.022 0.037 0 0 0.003 0.007 0.083 101.532

DC98-60-79 Fosters cp 65 35.111 0.084 0.011 29.723 35.636 0.094 0.011 0 0 0.022 0.008 0 0 0 0.024 100.724

DC98-60-79 Fosters cp 89 35.319 0.117 0 30.049 35.431 0.123 0 0 0.03 0.03 0.09 0 0.003 0 0.01 101.202

DC98-60-79 Fosters cp 90 35.574 0.077 0 30.153 35.205 0.305 0 0 0.012 0 0.032 0.003 0 0 0.048 101.409

DC98-60-79 Fosters cp 91 35.233 0.042 0 30.227 35.138 0.049 0.013 0 0 0.052 0.037 0 0 0.012 0.062 100.865

DC98-60-80 Fosters cp 7 35.481 0.1 0 30.313 35.308 0.154 0 0.003 0 0 0.029 0 0 0 0 101.388

DC98-60-80 Fosters cp 8 35.722 0.087 0 30.551 35.106 0.15 0 0.001 0 0.021 0.021 0 0 0 0 101.659

DC98-60-80 Fosters cp 14 35.852 0.086 0.01 30.473 34.586 0.014 0 0.007 0.018 0 0.019 0 0 0 0.031 101.096

DC98-51-379 Lago cp 80 35.036 0.096 0.016 30.203 35.511 0.1 0.003 0.023 0 0 0.064 0 0 101.052

DC98-51-379 Lago cp 81 35.707 0.154 0 30.331 35.162 0.029 0 0 0.001 0 0.028 0.018 0 101.43

DC98-51-379 Lago cp 82 35.826 0.088 0.013 30.011 35.37 0.068 0 0.004 0 0 0.01 0.02 0 101.41

DC98-51-379 Lago cp 90 35.56 0.052 0 30.222 35.61 0.037 0 0.011 0 0.013 0.034 0 0 101.539

DC98-51-379 Lago cp 91 35.847 0.1 0.014 29.896 35.104 0 0 0.013 0.016 0 0.071 0.003 0 101.064

DC98-51-379 Lago cp 92 35.796 0.098 0 30.113 35.156 0.031 0 0.012 0.015 0.025 0.006 0.003 0 101.255

DC98-51-379 Lago cp 101 35.407 0.14 0 28.984 34.965 0.094 0 0 0 0 0.027 0.006 0.051 99.674

97ADb58b WTF cp 53 34.84 0.135 0 30.021 35.237 0.151 0.008 0.002 0.016 0.015 0 0.011 0 0 100.436

97ADb58b WTF cp 56 34.831 0.154 0 30.383 35.288 0.051 0 0.033 0 0.001 0.009 0 0 0 100.75

97ADb58b WTF cp 57 34.982 0.13 0.011 30.427 35.565 0.113 0.01 0.024 0 0 0.032 0 0.018 0 101.312

97ADb58b WTF cp 59 34.871 0.08 0 30.067 35.229 0.175 0.022 0.006 0 0.03 0.019 0.002 0 0 100.501

97ADb58b WTF cp 65 34.431 0.069 0 30.544 34.965 0.196 0 0 0.029 0 0.049 0 0.008 0 100.291

97ADb58b WTF cp 68 34.825 0.056 0 30.448 34.89 0.174 0 0.007 0 0 0.05 0.014 0.008 0 100.472

97ADb58f WTF cp 37 35.569 0.125 0 30.229 35.429 0 0 0 0 0 0.055 0 0.025 0 0 101.432

97ADb58f WTF cp 38 35.299 0.105 0 30.381 35.066 0.027 0 0.006 0 0 0.018 0 0 0 0.015 100.917

97ADb58f WTF cp 42 34.925 0.203 0 30.07 34.925 0.459 0.026 0.022 0.009 0.013 0.033 0.008 0 0 0.013 100.706

97ADb58g WTF cp 97 35.309 0.086 0 30.198 34.732 0.107 0 0.016 0.023 0 0.038 0 0.004 0 100.513

97ADb58g WTF cp 101 34.884 0.059 0 29.713 35.096 1.2 0.002 0.013 0.018 0.016 0.041 0 0 0 101.042

97ADb58g WTF cp 104 35.017 0.115 0 29.669 34.915 1.557 0 0.001 0 0 0.031 0 0 0 101.305

97ADb58g WTF cp 105 34.316 0.079 0.001 29.928 35.061 0.08 0.037 0.006 0.007 0.019 0.01 0 0 0 99.544

97ADb58g WTF cp 106 35.181 0.103 0.003 30.296 35.143 0 0.007 0 0 0 0.065 0 0 0 100.798

97ADb58g WTF cp 110 34.439 0.161 0 29.83 35.109 0.078 0.013 0.018 0.006 0 0.011 0 0 0.016 99.681

23
Table 6 (continued). Complete electron microprobe analyses of sulfide minerals from the Bonnifield district, Alaska. 

Sample Deposit or 

Zone Min. Analysis No. Cu Pb As Fe S Zn Cd Se Mn Ag Co Sb Ni Hg Sn Total 

97ADb58g WTF cp 112 34.992 0.133 0 29.746 35.092 0.927 0 0.009 0.016 0 0 0 0 0 100.915

97ADb65b AM gn 60 0 86.189 0 0.006 13.173 0 0.277 0.042 0 0 0 0.025 0 0 0.014 99.726

97ADb65b AM gn 61 0 85.346 0 0.121 13.222 0.318 0.33 0.019 0 0 0 0 0 0 0.038 99.394

97ADb65b AM gn 69 0 85.876 0 0.634 13.025 0.128 0.313 0.123 0.01 0.015 0.063 0 0 0.011 0.026 100.224

97ADb65b AM gn 71 0 86.564 0 0.224 13.06 0.054 0.356 0.137 0 0 0.012 0 0 0.029 0.005 100.441

97ADb65b AM gn 91 0.088 87.099 0 0.013 13.043 0 0.302 0.103 0 0.005 0.08 0 0.01 0.059 0.034 100.836

AM98-1-201 AM gn 93 0.152 85.414 0 0.638 13.06 0 0.34 0.103 0.003 0.123 0.012 0 0.017 0.076 99.938

AM98-1-201 AM gn 95 0.158 86.914 0 0.112 13.214 0 0.348 0.088 0.017 0.14 0 0 0 0 100.991

AM98-1-201 AM gn 96 0 86.653 0 0.04 13.034 0.212 0.356 0.117 0 0.106 0 0 0 0 100.518

AM98-1-201 AM gn 97 0.031 86.653 0 0.088 13.069 0.018 0.387 0.12 0.018 0.087 0 0 0 0.003 100.474

AM98-1-201 AM gn 101 0.364 86.9 0 0.283 13.307 0 0.342 0.1 0 0.092 0 0 0.083 0.118 101.589

AM98-1-201 AM gn 106 0.085 87.403 0 0.063 13.007 0.077 0.372 0.096 0 0.081 0.029 0 0.032 0 101.245

AM98-1-201 AM gn 109 0.084 87.151 0 0.082 13.045 0.225 0.39 0.124 0.004 0.051 0.022 0 0 0 101.178

AM98-1-201 AM gn 110 0 87.245 0 0.483 13.137 0.298 0.372 0.133 0.012 0.095 0 0 0.001 0.012 101.788

AM98-1-201 AM gn 113 0.319 86.616 0 0.204 13.162 0.076 0.373 0.093 0 0.091 0.028 0 0 0.037 100.999

AM98-1-201 AM gn 114 0 86.419 0 0.014 13.095 0.025 0.378 0.1 0 0.03 0.018 0 0.017 0.067 100.163

AM98-1-201 AM gn 122 0.033 86.732 0 0.022 13.151 0.103 0.333 0.083 0.016 0 0 0 0 0.079 100.552

AM98-1-201 AM gn 124 0 87.224 0 0.065 13.23 0.119 0.381 0.05 0 0.066 0 0 0.009 0.067 101.211

AM98-1-201 AM gn 125 0.024 86.476 0 0.246 13.305 0.122 0.361 0.066 0 0.025 0.063 0 0 0.057 100.745

AM98-1-201 AM gn 133 0 86.529 0 0.166 13.15 0 0.402 0.1 0 0 0.039 0 0.06 0 100.446

AM98-1-201 AM gn 135 0.246 85.416 0 0.901 12.882 0.213 0.369 0.083 0 0.054 0 0 0 0.03 100.194

AM98-1-201 AM gn 143 0.127 86.833 0 0.203 13.119 0 0.362 0.142 0.011 0.092 0 0.013 0 0.079 100.981

AM98-1-201 AM gn 144 0.053 86.728 0 0.124 13.029 0.084 0.403 0.157 0.013 0.112 0 0.005 0 0.007 100.715

AM98-1-201 AM gn 145 0.101 87.001 0 0.233 13.191 0.112 0.389 0.144 0 0.12 0 0 0.01 0 101.301

DC97-36-190 DC South gn 41 0 87.503 0 0.039 13.27 0.038 0.268 0.03 0 0.074 0 0 0 101.222

DC97-36-190 DC South gn 42 0 87.201 0 0.112 13.189 0.003 0.275 0 0.003 0.037 0 0.01 0.051 100.881

DC97-36-190 DC South gn 43 0 87.771 0 0.052 13.367 0.004 0.253 0 0 0.042 0.026 0.006 0.014 101.535

DC97-36-190 DC South gn 44 0 87.637 0 0.036 13.268 0 0.305 0.005 0.008 0.112 0 0.033 0.029 101.433

DC97-9-170A Discovery gn 155 0.025 86.518 0 0 13.138 0.117 0.247 0.004 0 0.086 0 0 0 100.135

DC97-9-170A Discovery gn 160 0.039 86.942 0 0.005 13.363 0 0.289 0.003 0 0.108 0.005 0 0.031 100.785

DC97-9-170A Discovery gn 174 0 86.926 0 0.01 13.064 0.105 0.294 0.024 0.01 0.08 0.007 0 0.02 100.54

DC97-9-170A Discovery gn 175 0 86.355 0 0 13.262 0 0.311 0.017 0 0.123 0 0 0.018 100.086

DC97-9-170A Discovery gn 176 0.104 87.869 0 0 13.404 0 0.257 0.015 0 0.098 0.047 0 0 101.794

DC98-38-208 Fosters gn 118 0.044 88.114 0 0.025 13.308 0.025 0.234 0.003 0 0 0 0.001 0.03 101.784

DC98-38-208 Fosters gn 119 0.017 87.569 0 0.026 12.817 0.092 0.261 0.004 0 0 0.014 0 0.079 100.879

DC98-38-208 Fosters gn 120 0 87.567 0 0.018 13.23 0.208 0.221 0.012 0.008 0 0 0 0.039 101.303

DC98-38-208 Fosters gn 121 0 88.221 0 0.032 13.081 0.093 0.259 0 0.003 0 0.059 0 0.02 101.768

DC98-38-208 Fosters gn 124 0 87.968 0 0.007 13.34 0.259 0.214 0.031 0.025 0.033 0.005 0 0.022 101.904

DC98-38-208 Fosters gn 130 0 87.476 0 0.187 13.226 0 0.223 0 0.007 0 0.031 0 0 101.15

DC98-38-208 Fosters gn 137 0 87.066 0 0 13.233 0.078 0.213 0.011 0.015 0.115 0 0.017 0.006 100.754

DC98-38-208 Fosters gn 142 0 87.253 0 0 13.376 0 0.22 0 0.006 0 0.019 0.013 0.01 100.897

DC98-38-208 Fosters gn 143 0 87.305 0 0.012 13.184 0.053 0.246 0.003 0 0 0 0 0 100.803

DC98-38-208 Fosters gn 147 0.005 87.617 0 0.002 13.311 0.19 0.225 0.018 0.007 0 0 0.009 0.035 101.419

DC98-38-208 Fosters gn 150 0 86.701 0 0 13.334 0.179 0.21 0.02 0 0 0.031 0.001 0.051 100.527

DC98-38-208 Fosters gn 154 0 87.212 0 0.008 13.219 0.055 0.3 0 0.027 0 0.046 0 0.078 100.945

DC98-38-208 Fosters gn 155 0.028 87.086 0 0.02 13.157 0.13 0.268 0 0 0.014 0.021 0 0.04 100.764

DC98-38-208 Fosters gn 164 0 85.074 0 0.005 13.011 0.094 0.26 0 0.016 0 0 0.005 0.016 98.481

DC98-38-208 Fosters gn 165 0 87.118 0 0 13.233 0 0.228 0.002 0.005 0.039 0.022 0 0.054 100.701

DC98-38-208 Fosters gn 169 0 85.924 0 0 13.449 0.128 0.3 0.011 0 0 0.068 0 0 99.88

DC98-38-208 Fosters gn 173 0 87.444 0 0 13.282 0.193 0.259 0.009 0.012 0 0.034 0.019 0.049 101.301

DC98-38-208 Fosters gn 179 0 87.974 0 0 13.283 0.298 0.24 0.011 0 0.01 0.018 0.023 0.039 101.896

DC98-38-208 Fosters gn 183 0 87.705 0 0.014 13.191 0.233 0.25 0.005 0 0.013 0 0 0 101.411

24
Table 6 (continued). Complete electron microprobe analyses of sulfide minerals from the Bonnifield district, Alaska. 

Sample Deposit or 

Zone Min. Analysis No. Cu Pb As Fe S Zn Cd Se Mn Ag Co Sb Ni Hg Sn Total 

DC98-60-128.9 Fosters gn 101 0.029 87.489 0 0 13.21 0.133 0.284 0.009 0 0 0.016 0.035 0.034 0 0.026 101.265

DC98-60-128.9 Fosters gn 102 0 88.238 0 0.022 13.27 0 0.285 0.012 0 0 0.03 0.017 0.006 0 0.018 101.898

DC98-60-128.9 Fosters gn 103 0 87.893 0 0.026 13.142 0 0.284 0 0 0 0 0 0.002 0 0 101.347

DC98-60-128.9 Fosters gn 110 0.005 87.868 0 0 13.094 0.019 0.276 0 0 0 0.002 0 0.02 0.017 0.038 101.339

DC98-60-128.9 Fosters gn 113 0 87.726 0 0 12.927 0.072 0.269 0.017 0 0 0 0.029 0.008 0.103 0 101.151

DC98-60-128.9 Fosters gn 125 0 87.958 0 0 13.11 0.094 0.265 0 0.028 0 0.024 0.001 0 0 0 101.48

DC98-60-128.9 Fosters gn 126 0 87.26 0 0 13.208 0.126 0.294 0.009 0.036 0 0.021 0 0.041 0.034 0 101.029

DC98-60-128.9 Fosters gn 135 0 88.273 0 0.008 13.257 0 0.287 0 0.018 0 0.028 0.001 0.013 0.015 0 101.9

DC98-60-128.9 Fosters gn 137 0 87.806 0 0 13.054 0.059 0.231 0.012 0.003 0.017 0 0.009 0 0.049 0.028 101.268

DC98-60-128.9 Fosters gn 141 0 87.108 0 0.002 13.176 0.014 0.325 0.004 0.022 0 0.028 0.003 0.015 0 0 100.697

DC98-60-128.9 Fosters gn 148 0.02 87.698 0 0.003 13.165 0.01 0.293 0 0 0 0.067 0.015 0 0.072 0 101.343

DC98-60-128.9 Fosters gn 149 0 87.966 0 0 13.091 0 0.312 0.005 0 0 0.008 0.001 0.034 0.001 0.017 101.435

DC98-60-79 Fosters gn 56 0 87.295 0 0.006 12.992 0 0.297 0.023 0 0 0 0 0.01 0.011 0.047 100.681

DC98-60-79 Fosters gn 60 0 87.286 0 0.002 13.1 0 0.295 0.02 0.015 0 0.038 0 0.011 0.038 0 100.805

DC98-60-79 Fosters gn 62 0 87.224 0 0 13.12 0 0.295 0.026 0 0 0 0 0 0.069 0 100.734

DC98-60-79 Fosters gn 67 0.059 87.055 0 0.02 13.168 0.09 0.272 0.003 0 0 0.01 0 0 0.046 0 100.723

DC98-60-79 Fosters gn 71 0.052 87.381 0 0 13.187 0.113 0.276 0.032 0 0 0.015 0 0 0 0.033 101.089

DC98-60-79 Fosters gn 76 0 87.405 0 0 13.13 0 0.309 0 0 0 0.057 0 0 0.071 0.042 101.014

DC98-60-79 Fosters gn 81 0 87.756 0 0.002 13.09 0.127 0.252 0.049 0.004 0 0 0 0.025 0.02 0 101.325

DC98-60-79 Fosters gn 87 0.04 87.805 0 0.017 13.081 0 0.293 0.014 0.005 0 0.035 0 0 0.02 0.042 101.352

DC98-60-79 Fosters gn 88 0 87.488 0 0 13.039 0 0.264 0.019 0 0 0 0.009 0.031 0.037 0.036 100.923

DC98-60-79 Fosters gn 95 0.133 88.159 0 0 13.169 0.315 0.296 0.005 0.031 0 0.077 0 0 0.053 0 102.238

DC98-60-79 Fosters gn 97 0.056 87.576 0 0 13.245 0.072 0.254 0.011 0.004 0 0 0 0.013 0.025 0.004 101.26

DC98-60-80 Fosters gn 3 0 87.406 0 0.016 13.009 0.064 0.256 0.012 0 0 0 0 0 0.071 0.012 100.846

DC98-60-80 Fosters gn 4 0.048 87.273 0 0.002 13.058 0.097 0.285 0.018 0 0 0.005 0.019 0 0 0.042 100.847

DC98-60-80 Fosters gn 11 0.019 87.959 0 0.012 13.105 0 0.26 0.006 0.003 0 0 0.004 0 0.048 0.003 101.419

DC98-51-379 Lago gn 31 0 87.18 0 0.059 13.041 0.04 0.265 0.004 0.002 0 0.021 0 0.034 100.646

DC98-51-379 Lago gn 32 0 86.615 0 0.092 12.947 0 0.244 0 0.019 0 0 0 0.075 99.992

DC98-51-379 Lago gn 33 0 86.837 0 0.013 13.08 0 0.236 0.01 0.032 0.005 0.048 0.014 0.006 100.281

DC98-51-379 Lago gn 41 0 87.311 0 0.019 13.181 0 0.291 0 0.005 0 0 0.014 0.058 100.879

DC98-51-379 Lago gn 42 0 86.631 0 0 13.166 0.127 0.306 0.017 0 0 0 0.013 0.059 100.319

DC98-51-379 Lago gn 43 0 87.254 0 0 13.193 0.045 0.26 0.002 0 0 0 0 0.06 100.814

DC98-51-379 Lago gn 52 0 86.331 0 1.701 13.386 0.049 0.304 0.023 0 0 0.005 0.02 0.003 101.822

DC98-51-379 Lago gn 53 0 87.076 0 0.267 13.136 0.123 0.28 0 0.043 0 0 0 0 100.925

DC98-51-379 Lago gn 54 0 87.384 0 0.067 13.158 0 0.314 0.002 0 0 0.037 0.003 0.032 100.997

DC98-51-379 Lago gn 75 0.072 86.895 0 0.069 13.137 0.642 0.305 0 0 0 0 0 0 101.12

DC98-51-379 Lago gn 93 0.245 87.404 0 0.068 13.003 0.349 0.28 0.01 0 0 0.037 0 0.03 101.426

97ADb58b WTF gn 38 0 88.07 0 0.022 13.134 0.012 0.226 0.024 0 0 0.074 0 0 0.041 101.603

97ADb58b WTF gn 40 0.026 87.482 0 0.046 13.064 0.294 0.297 0.015 0.002 0 0.057 0.032 0 0.029 101.344

97ADb58b WTF gn 44 0.02 87.4 0 0 13.033 0.034 0.304 0.023 0 0 0 0 0.014 0.008 100.836

97ADb58b WTF gn 45 0 87.366 0 0.003 13.118 0.287 0.342 0.022 0 0 0.023 0 0.004 0 101.165

97ADb58b WTF gn 49 0 86.915 0 0.018 13.102 0 0.257 0.021 0 0 0.029 0.024 0 0.043 100.409

97ADb58b WTF gn 52 0.001 87.76 0 0.077 13.065 0.136 0.264 0.015 0 0 0 0.029 0 0.003 101.35

97ADb58b WTF gn 58 0 87.737 0 0.001 13.144 0.229 0.22 0.04 0.021 0 0.028 0.027 0.015 0.036 101.498

97ADb58b WTF gn 64 0.01 88.498 0 0.092 12.854 0.416 0.308 0.048 0.006 0 0.028 0.016 0 0.013 102.289

97ADb58b WTF gn 71 0 87.849 0 0.033 13.195 0.081 0.218 0.042 0 0 0 0 0 0.008 101.426

97ADb58b WTF gn 73 0 87.657 0 0.069 13.162 0.512 0.279 0.077 0.007 0 0.03 0 0 0.026 101.819

97ADb58f WTF gn 31 0 87.518 0 0.207 12.983 0.679 0.288 0.084 0 0 0.048 0 0 0.132 0 101.939

97ADb58f WTF gn 35 0 87.787 0 0.069 12.982 0.015 0.267 0.074 0 0 0 0.031 0.02 0.047 0 101.292

97ADb58f WTF gn 45 0.013 87.243 0 0.203 13.017 0.078 0.319 0.081 0 0.004 0.013 0 0 0.018 0.028 101.017

97ADb58f WTF gn 46 0 87.063 0 0.004 13.12 0.187 0.314 0.072 0 0 0.046 0 0.006 0.15 0.054 101.016

97ADb58f WTF gn 47 0.022 86.998 0 0.064 12.931 0.553 0.24 0.089 0.011 0 0 0 0 0.045 0 100.953

25
Table 6 (continued). Complete electron microprobe analyses of sulfide minerals from the Bonnifield district, Alaska. 

Sample Deposit or 

Zone Min. Analysis No. Cu Pb As Fe S Zn Cd Se Mn Ag Co Sb Ni Hg Sn Total 

97ADb58f WTF gn 48 0 85.25 0 0.177 13.127 0.133 0.28 0.071 0 0 0.009 0 0 0.019 0 99.066

97ADb58f WTF gn 54 0.084 87.762 0 0.006 12.99 0.029 0.256 0.074 0.003 0.023 0.008 0 0.02 0.089 0.009 101.353

97ADb58g WTF gn 93 0 87.878 0 0 13.034 0.102 0.223 0.017 0.008 0.066 0 0.051 0 0.045 101.424

97ADb58g WTF gn 94 0 86.454 0 0.017 13.126 0.277 0.313 0 0 0 0 0.013 0.048 0.003 100.251

97ADb58g WTF gn 95 0 86.758 0 0.03 13.183 0.146 0.277 0.02 0.018 0 0 0.027 0.021 0.036 100.516

97ADb65b AM py 65 0 0.166 0.669 46.439 53.11 0 0 0.007 0.028 0.052 0.038 0.173 0 0 0 100.682

97ADb65b AM py 66 0 0.169 0.858 46.532 52.949 0.028 0 0 0.054 0 0 0.014 0 0 0.004 100.608

97ADb65b AM py 67 0 0.232 0.15 47.051 53.756 0.191 0 0.012 0 0 0 0 0.044 0.007 0 101.443

97ADb65b AM py 68 0.908 0.325 0.05 46.11 53.048 0.142 0 0 0.005 0.045 0.056 0.044 0 0 0.004 100.737

97ADb65b AM py 72 0.041 0.237 1.097 45.711 53.207 0.017 0 0.007 0.199 0.021 0.083 0.045 0.005 0 0 100.67

97ADb65b AM py 75 0 0.224 0.063 47.411 53.452 0.028 0 0.004 0.014 0.013 0.074 0.016 0 0 0.012 101.311

97ADb65b AM py 76 0 0.182 1.761 45.878 52.768 0 0.004 0 0.122 0 0.076 0.034 0.015 0 0.008 100.848

97ADb65b AM py 78 0 1.161 0.222 45.9 53.337 0 0 0 0.065 0 0.053 0.015 0.022 0 0.009 100.784

97ADb65b AM py 79 0 0.733 0.115 45.464 52.844 0.104 0 0 0.067 0 0.048 0.01 0.049 0 0.038 99.472

97ADb65b AM py 80 0 0.212 0.947 46.447 53.055 0.009 0.029 0 0.089 0 0.037 0.036 0 0 0.006 100.867

97ADb65b AM py 85 0 0.179 0.51 46.587 53.319 0 0.008 0 0 0.02 0.091 0 0.322 0 0.02 101.056

97ADb65b AM py 94 0 0.193 0.093 46.863 53.674 0.146 0.001 0 0 0 0.071 0.002 0.022 0 0 101.065

97ADb65b AM py 95 0 0.328 0.485 46.635 53.38 0.009 0.02 0.005 0.073 0.01 0.037 0 0.02 0 0.003 101.005

97ADb65b AM py 96 0 0.175 1.462 46.123 52.629 0.313 0 0 0.002 0.007 0.044 0.061 0.002 0 0.027 100.845

97ADb65b AM py 97 0 0.213 0.195 47.177 53.558 0.6 0 0.016 0 0 0.007 0 0.063 0 0 101.829

AM98-1-108 AM py 58 0 0.163 0.22 46.717 53.561 0 0 0.012 0.002 0 0.038 0 0 0 0.045 100.758

AM98-1-108 AM py 59 0.028 0.288 0.111 46.54 53.504 0.144 0 0.006 0.034 0 0.015 0.01 0.041 0 0.024 100.745

AM98-1-108 AM py 63 0 0.149 0.107 46.87 53.713 0.061 0 0 0 0 0.049 0.029 0.007 0 0 100.985

AM98-1-108 AM py 64 0 0.175 0.289 46.473 53.512 0.026 0 0.013 0.015 0.011 0.013 0.006 0 0 0 100.533

AM98-1-108 AM py 65 0.044 0.211 0.015 45.962 53.612 0 0.031 0 0 0.023 0.05 0.012 0.252 0 0 100.212

AM98-1-108 AM py 67 0.024 0.169 0 46.892 53.924 0 0.012 0.027 0 0 0.019 0.037 0 0 0.017 101.121

AM98-1-108 AM py 68 0 0.578 0.016 46.579 53.097 0 0 0 0 0 0.052 0 0.035 0 0.014 100.371

AM98-1-108 AM py 72 0.031 0.153 0 46.818 53.945 0.021 0 0.007 0.013 0.006 0.081 0 0 0 0.015 101.09

AM98-1-108 AM py 73 0.112 0.164 0.056 45.428 53.61 0 0.011 0.002 0.011 0.021 0.058 0 0.08 0 0 99.553

AM98-1-108 AM py 79 0 0.2 0 46.851 53.736 0 0.005 0 0 0 0.077 0.027 0 0 0 100.896

AM98-1-108 AM py 81 0.08 0.247 0.296 46.482 53.258 0.051 0.013 0.021 0 0 0.057 0.004 0 0 0 100.509

AM98-1-108 AM py 88 0 0.186 0 46.696 53.491 0 0 0.017 0.017 0 0.057 0 0 0 0 100.464

AM98-1-108 AM py 89 0 0.169 0 46.46 53.784 0.009 0 0.116 0 0.074 0.071 0.005 0 0 0.005 100.693

AM98-1-108 AM py 90 0.019 0.209 0 45.885 53.799 0 0 0.038 0.001 0 0.081 0 0 0 0.039 100.071

AM98-1-108 AM py 96 0 0.106 0.154 47.108 53.624 0.024 0.024 0.008 0.003 0.03 0.094 0 0.114 0 0 101.289

AM98-1-108 AM py 98 0 0.107 0.015 46.606 53.732 0 0.006 0.045 0 0.017 0.089 0.004 0.003 0 0 100.624

AM98-1-108 AM py 99 0 0.077 0.004 47.469 53.657 0.042 0.01 0.027 0 0.023 0.061 0 0.007 0 0.004 101.381

AM98-1-108 AM py 100 0 0.105 0.144 46.705 54.058 0 0.027 0.014 0 0 0.038 0 0.005 0 0.061 101.157

AM98-1-108 AM py 101 0.051 0.153 0.059 46.773 54.114 0.076 0 0.007 0.009 0.021 0.127 0.018 0 0 0 101.408

AM98-1-201 AM py 86 0.04 0.142 0.017 47.108 54.215 0.062 0 0 0 0 0.072 0.019 0.006 0 101.681

AM98-1-201 AM py 87 0.202 0.14 0.017 46.699 53.842 0.114 0 0 0 0.005 0.061 0.002 0.004 0 101.086

AM98-1-201 AM py 90 0 0.202 0.212 46.633 53.761 0.757 0.012 0.002 0 0 0.052 0 0 0 101.631

AM98-1-201 AM py 92 0.011 0.632 0.074 46.489 53.115 0.015 0 0.056 0.003 0.037 0.052 0.001 0.004 0 100.489

AM98-1-201 AM py 99 0.092 0.712 1.986 45.28 52.333 0.433 0.033 0.013 0 0.027 0.309 0.003 0 0 101.221

AM98-1-201 AM py 100 0.038 0.302 0.394 46.571 53.455 0.029 0 0.015 0.005 0.016 0.063 0.028 0 0 100.916

AM98-1-201 AM py 105 0.172 0.111 0 46.95 54.243 0 0.02 0.006 0 0.019 0.014 0.034 0.035 0 101.604

AM98-1-201 AM py 111 0.045 0.123 0.023 46.688 54.036 0.1 0.001 0.004 0 0.032 0.016 0.004 0 0 101.072

AM98-1-201 AM py 112 0 0.135 0.034 46.512 54.147 0.596 0 0 0 0 0.016 0 0 0 101.44

AM98-1-201 AM py 116 0.087 0.788 0.166 46.179 53.265 0.47 0 0.009 0.012 0.027 0.005 0.004 0.009 0 101.021

AM98-1-201 AM py 117 0.014 0.137 0.227 47.169 53.873 0.461 0 0 0 0 0.198 0.005 0.044 0 102.128

AM98-1-201 AM py 119 0 0.208 0.038 46.558 53.373 0.069 0 0.016 0.01 0 0.059 0.007 0 0 100.338

AM98-1-201 AM py 123 0.061 0.117 0.058 46.758 53.942 0 0 0 0 0 0.039 0.036 0.153 0 101.164

26
Table 6 (continued). Complete electron microprobe analyses of sulfide minerals from the Bonnifield district, Alaska. 

Sample Deposit or 

Zone Min. Analysis No. Cu Pb As Fe S Zn Cd Se Mn Ag Co Sb Ni Hg Sn Total 

AM98-1-201 AM py 126 2.199 0.212 0.185 45.477 52.529 0.104 0.003 0 0.004 0.038 0.084 0.01 0.041 0 100.886

AM98-1-201 AM py 127 0.284 0.174 0 46.727 53.91 0.237 0 0.01 0.009 0.028 0.031 0 0 0 101.41

AM98-1-201 AM py 134 0.04 0.192 0.026 46.96 54.288 0.037 0 0.01 0.025 0 0.024 0 0 0 101.602

AM98-1-201 AM py 137 0.339 0.123 0.459 46.91 53.28 0 0 0.006 0 0.009 0.058 0.122 0 0 101.306

AM98-1-201 AM py 142 0.049 0.175 0.06 46.692 54.218 0.493 0 0.003 0 0.017 0.086 0.038 0.017 0 101.848

AM98-1-201 AM py 147 0.086 0.142 0.01 47.064 54.066 0 0 0.016 0.011 0 0.084 0.021 0.003 0 101.503

AM98-1-201 AM py 148 0.006 0.122 0.57 46.912 53.57 0 0 0.016 0.055 0 0.051 0 0 0 101.302

AM98-5-212 AM py 33 0.006 0.192 0.06 46.695 53.662 0 0 0.011 0 0.004 0.095 0.001 0 0 100.726

AM98-5-212 AM py 37 0.16 0.155 0 46.386 53.724 0.167 0.001 0.002 0.049 0.01 0.075 0 0 0 100.729

AM98-5-212 AM py 42 0 0.22 0.02 46.552 53.734 0.104 0.015 0 0 0.013 0.032 0 0 0 100.69

AM98-5-212 AM py 43 0.036 0.16 0.061 46.308 53.612 0.089 0 0.016 0 0 0.075 0 0.005 0.032 100.394

AM98-5-212 AM py 47 0 0.197 0.097 46.587 53.773 0.07 0.001 0.025 0 0 0.014 0.004 0 0 100.768

AM98-5-212 AM py 49 1.346 0.378 0.02 45.343 52.717 0.206 0 0.042 0 0.027 0.069 0.008 0 0 100.156

AM98-5-212 AM py 53 0 0.226 0.075 46.387 53.399 0.127 0.018 0.001 0.025 0.031 0.061 0 0 0 100.35

AM98-5-212 AM py 54 0.085 0.437 0.051 45.355 53.541 0.342 0 0.018 0.323 0 0.023 0.016 0.025 0 100.216

AM98-5-212 AM py 55 0.016 0.82 0.125 44.947 52.921 0.11 0 0.006 0.516 0.042 0.094 0 0 0 99.597

AM98-5-212 AM py 56 0.233 0.123 0 46.405 53.497 0.131 0 0 0.022 0.073 0.096 0.001 0.021 0 100.602

AM98-5-212 AM py 58 0.069 0.29 0.023 45.735 51.458 0.288 0 0.013 0.047 0.005 0.132 0 0 0 98.06

AM98-5-212 AM py 60 0.041 0.271 0.101 46.252 53.76 0.106 0.002 0.008 0.082 0 0.084 0 0 0 100.707

AM98-5-212 AM py 61 0 0.239 0.07 46.43 53.935 0.108 0 0 0.012 0.024 0.062 0.004 0.009 0 100.893

AM98-5-212 AM py 62 0.061 0.246 0.06 45.957 53.557 0.264 0 0.024 0.242 0.009 0.057 0 0.001 0 100.478

AM98-5-212 AM py 64 0.003 0.25 0 46.376 53.871 0 0 0.01 0 0.003 0.074 0.015 0 0 100.602

AM98-5-212 AM py 65 0 0.395 0.012 46.581 53.63 0.177 0 0.018 0 0.028 0.115 0.014 0 0 100.97

AM98-5-212 AM py 81 0.066 0.278 0.007 45.931 53.201 0.08 0 0.001 0 0 0.073 0.001 0.012 0 99.65

AM98-5-212 AM py 83 0.109 0.177 0.034 46.467 54.46 0.213 0.007 0 0 0.032 0.073 0 0.019 0 101.591

AM98-5-212 AM py 84 0.154 1.103 0.117 44.556 52.912 0.229 0.005 0.021 0.272 0.017 0.158 0 0 0 99.544

DC97-36-190 DC South py 31 0.026 0.13 0 46.97 54.237 0 0.021 0.001 0.006 0 0.002 0 0 101.393

DC97-36-190 DC South py 32 0 0.093 0.004 46.937 54.16 0 0 0.009 0 0.006 0.033 0.008 0.011 101.261

DC97-36-190 DC South py 33 0 0.13 0.004 46.852 53.716 0.073 0.002 0.002 0.002 0 0.036 0 0 100.817

DC97-36-190 DC South py 34 0.029 0.153 0.027 46.93 53.902 0.01 0.01 0.006 0.032 0.019 0.036 0.018 0 101.172

DC97-36-190 DC South py 35 0.035 0.139 0.042 46.693 54.028 0.002 0 0 0 0 0.02 0.02 0 100.979

DC97-36-190 DC South py 36 0 0.134 0 46.989 54.153 0.058 0.01 0 0.016 0.003 0.091 0.009 0 101.463

DC97-36-190 DC South py 37 0.03 0.133 0.029 47.399 54.084 0.06 0 0 0 0 0.008 0.01 0 101.753

DC97-36-190 DC South py 38 0 0.123 0.004 47.044 54.152 0 0.004 0 0 0 0.036 0.002 0 101.365

DC97-36-190 DC South py 39 0 0.124 0.004 47.119 53.804 0 0.013 0 0.004 0 0.039 0 0 101.107

DC97-36-190 DC South py 40 0.008 0.17 0 46.664 53.931 0.365 0.009 0 0.007 0.004 0.036 0.012 0 101.206

DC97-36-190 DC South py 45 0 0.139 0 46.823 54.184 0.027 0 0.013 0 0 0.043 0.014 0 101.243

DC97-36-190 DC South py 52 0 0.199 0.008 46.634 54.251 0.515 0 0.009 0 0.004 0.063 0 0.008 101.691

DC97-36-190 DC South py 53 0 0.173 0.02 46.792 54.239 0.306 0 0 0.005 0.001 0.109 0 0 101.645

DC97-36-190 DC South py 55 0 0.162 0 46.944 53.944 0.025 0.015 0.045 0 0.017 0.04 0.004 0 101.196

DC97-36-190 DC South py 56 0.109 0.131 0 46.694 53.817 0.148 0 0.062 0.006 0 0.096 0 0 101.063

DC97-36-190 DC South py 57 0 0.129 0 47.354 53.835 0 0.017 0.016 0.006 0 0.054 0 0 101.411

DC97-36-190 DC South py 58 0 0.165 0.007 47.2 53.925 0 0.028 0.025 0 0.013 0.114 0.019 0 101.496

DC97-36-190 DC South py 59 0 0.176 0.007 46.846 53.844 0.013 0.002 0.03 0 0 0.058 0.006 0 100.982

DC97-36-190 DC South py 60 0 0.112 0.01 46.753 53.81 0 0.029 0.013 0.013 0.019 0.033 0 0 100.792

DC97-36-190 DC South py 61 0 0.165 0 46.855 54.048 0 0 0.009 0 0 0.075 0 0 101.152

DC97-36-190 DC South py 62 0 0.186 0.008 46.27 53.559 0.461 0.017 0.025 0 0.027 0.04 0.011 0 100.604

DC97-36-190 DC South py 63 0.098 0.167 0 47.193 54.034 0.002 0 0.016 0.014 0 0.016 0 0 101.54

DC97-36-190 DC South py 64 0.053 0.147 0 46.986 54.054 0 0 0.001 0.011 0 0.056 0.007 0 101.315

DC97-36-190 DC South py 65 0 0.142 0 47.256 53.954 0 0 0 0 0 0.066 0.002 0 101.42

DC97-36-190 DC South py 66 0 0.174 0 47.042 53.942 0.056 0 0.032 0.004 0 0.051 0.004 0 101.305

DC97-36-190 DC South py 67 0 0.16 0 47.068 53.596 0 0 0.004 0 0.015 0.026 0.005 0 100.874

27
Table 6 (continued). Complete electron microprobe analyses of sulfide minerals from the Bonnifield district, Alaska. 

Sample Deposit or 

Zone Min. Analysis No. Cu Pb As Fe S Zn Cd Se Mn Ag Co Sb Ni Hg Sn Total 

DC97-36-190 DC South py 68 0.04 0.14 0.001 46.679 53.668 0 0 0 0 0 0.018 0 0 100.546

DC97-36-190 DC South py 69 0.156 0.132 0 47.142 54.084 0 0.014 0.014 0 0 0.051 0.016 0 101.609

DC97-36-190 DC South py 70 0.013 0.144 0 47.168 53.822 0.04 0 0.026 0.009 0 0 0 0 101.222

DC97-36-190 DC South py 71 0 0.152 0.005 46.894 54.109 0 0 0.017 0 0 0.011 0 0 101.188

DC97-36-190 DC South py 72 0.042 0.175 0 46.656 53.786 0 0 0.023 0.002 0 0.06 0 0 100.744

DC97-36-190 DC South py 73 0.002 0.166 0 46.968 53.713 0.109 0 0 0 0.025 0.085 0 0 101.068

DC97-36-190 DC South py 74 0 0.164 0 46.765 54.172 0.109 0 0.016 0.018 0.026 0.033 0 0 101.303

DC97-36-190 DC South py 82 0 0.128 0.025 46.782 54.021 0.223 0 0.014 0 0 0.109 0.019 0 101.321

DC97-36-190 DC South py 83 0.07 0.191 0.012 46.751 54.166 0.244 0 0.017 0 0.009 0.071 0.006 0 101.537

DC97-36-190 DC South py 88 0 0.138 0.003 46.901 53.826 0.285 0 0 0.009 0.005 0.012 0 0 101.179

DC97-36-190 DC South py 92 0 0.235 0.029 47.125 54.288 0 0.006 0 0 0 0.048 0 0.014 101.745

DC97-36-190 DC South py 95 0 0.142 0 47.043 54.088 0.09 0 0 0.005 0.002 0.044 0.01 0 101.424

DC97-36-190 DC South py 96 0 0.142 0 46.575 54.232 0 0 0.019 0.008 0.029 0.064 0 0 101.069

DC97-36-190 DC South py 97 0.01 0.212 0.021 46.511 53.967 0.015 0 0.005 0.019 0.02 0 0 0 100.78

DC97-36-190 DC South py 98 0.006 0.205 0.047 46.284 53.83 0 0.018 0.005 0 0 0.049 0 0 100.444

DC97-36-190 DC South py 99 0.05 0.181 0.019 46.723 53.759 0 0.018 0 0.015 0.018 0.077 0 0 100.86

DC97-36-190 DC South py 100 0 0.161 0.004 46.87 54.278 0 0 0 0 0 0.045 0 0 101.358

DC97-36-190 DC South py 101 0.016 0.135 0 46.918 54.118 0 0.005 0.017 0 0 0.034 0 0 101.243

DC97-36-190 DC South py 102 0.008 0.129 0.016 46.727 54.215 0 0 0.012 0.005 0 0.021 0 0 101.133

DC97-36-190 DC South py 103 0 0.145 0.02 46.933 54.395 0 0.022 0 0 0 0.039 0.006 0 101.56

DC97-36-190 DC South py 104 0.029 0.124 0 46.631 54.198 0 0 0.003 0.01 0.024 0.052 0 0 101.071

DC97-36-190 DC South py 105 0 0.126 0.004 46.927 54.202 0.013 0.016 0.027 0 0.013 0.089 0.005 0 101.422

DC97-36-190 DC South py 106 0.07 0.276 0 47.154 54.509 0 0 0.04 0 0 0.125 0 0 102.174

DC97-36-190 DC South py 107 0 0.163 0 46.664 54.002 0 0 0.006 0 0 0.015 0 0 100.85

DC97-36-190 DC South py 108 0 0.203 0.029 46.73 54.192 0 0 0.011 0 0.005 0.029 0.029 0 101.228

DC97-36-190 DC South py 109 0 0.209 0 46.692 54.269 0.108 0 0.003 0.005 0 0.079 0.026 0 101.391

DC97-36-190 DC South py 110 0 0.154 0.002 46.97 54.051 0 0.033 0.005 0.002 0.036 0.046 0.007 0.007 101.313

DC97-36-190 DC South py 113 0.088 0.161 0 46.593 54.095 0 0 0.017 0 0.02 0.047 0 0 101.021

DC97-36-190 DC South py 114 0 0.186 0 46.498 54.192 1.051 0.009 0.008 0.004 0 0.059 0 0 102.007

DC97-36-190 DC South py 129 0.055 0.181 0.002 46.113 54.33 0.056 0.011 0 0.017 0 0.06 0.008 0 100.833

DC97-36-190 DC South py 131 0.053 0.186 0 46.899 53.967 0.547 0 0.002 0.006 0.018 0.052 0 0 101.73

DC97-36-190 DC South py 132 0.048 0.205 0.035 46.775 54.302 0.772 0 0.023 0.002 0 0.026 0 0 102.188

DC97-36-190 DC South py 133 0.075 0.112 0.024 47.171 53.89 0 0.013 0 0.003 0 0.117 0.007 0 101.412

DC97-36-190 DC South py 134 0.014 0.18 0.013 46.951 54.196 0.154 0 0.02 0.012 0 0.058 0 0 101.598

DC97-36-190 DC South py 135 0 0.158 0.003 47.106 54.154 0 0.015 0 0.018 0.016 0.061 0 0 101.531

DC97-36-190 DC South py 136 0 0.137 0.017 47.432 54.44 0.037 0 0.027 0 0.011 0.065 0 0 102.166

DC97-36-190 DC South py 137 0 0.134 0 47.331 54.1 0.089 0 0.056 0 0 0.029 0.009 0 101.748

DC97-36-190 DC South py 138 0.014 0.177 0.006 46.333 54.418 0.958 0.02 0.009 0 0 0.033 0.02 0 101.988

DC97-36-190 DC South py 145 0 0.174 0.012 46.656 54.415 0.075 0.016 0.01 0 0 0.09 0 0 101.448

DC97-36-190 DC South py 146 0.003 0.186 0.001 46.499 53.757 0.044 0.014 0.017 0 0 0.072 0.018 0 100.611

DC97-36-190 DC South py 147 0 0.126 0.002 47.031 54.33 0.091 0.01 0.014 0 0.033 0.08 0 0 101.717

DC97-9-170A Discovery py 156 0.122 0.397 0.213 46.274 54.308 0.229 0.002 0 0 0.012 0.034 0.058 0 101.649

DC97-9-170A Discovery py 157 0 0.336 0.118 46.265 53.688 0.799 0 0 0.001 0.067 0 0.017 0 101.291

DC97-9-170A Discovery py 162 0.171 0.121 0.926 46.697 53.267 0 0 0 0 0 0.085 0 0 101.267

DC97-9-170A Discovery py 163 0.12 0.214 0.738 46.331 53.699 0.232 0 0.014 0.018 0.008 0.089 0.088 0 101.551

DC97-9-170A Discovery py 165 0.199 0.167 0.874 46.392 53.531 0.008 0.006 0.025 0.007 0 0.091 0.027 0 101.327

DC97-9-170A Discovery py 166 0.223 0.136 0.875 46.73 53.331 0.077 0 0 0 0 0.008 0.065 0 101.445

DC97-9-170A Discovery py 167 0.067 0.14 0.646 46.635 54.269 0 0.003 0 0.018 0 0.047 0 0 101.825

DC97-9-170A Discovery py 168 0.493 0.204 0 46.654 54.307 0 0 0.023 0.014 0.03 0.046 0 0 101.771

DC97-9-170A Discovery py 169 0.096 0.138 1.811 46.34 52.856 0.505 0.001 0.007 0 0 0.044 0 0 101.798

DC97-9-170A Discovery py 173 0.046 0.232 1.168 45.045 53.392 2.8 0.019 0.006 0 0.058 0.005 0.102 0 102.873

DC98-38-208 Fosters py 122 0 0.181 0.066 46.755 53.883 0.188 0 0.011 0.014 0 0.046 0.019 0 101.163

28
Table 6 (continued). Complete electron microprobe analyses of sulfide minerals from the Bonnifield district, Alaska. 

Sample Deposit or 

Zone Min. Analysis No. Cu Pb As Fe S Zn Cd Se Mn Ag Co Sb Ni Hg Sn Total 

DC98-38-208 Fosters py 125 0.006 0.08 0.051 46.822 54.357 0.23 0.039 0.004 0.003 0.016 0.042 0.023 0 101.673

DC98-38-208 Fosters py 126 0.064 0.164 0.732 46.633 53.724 0.027 0 0.011 0.023 0 0.055 0.001 0 101.434

DC98-38-208 Fosters py 131 0.026 0.19 0.249 46.716 53.57 0.087 0 0 0.003 0.049 0.006 0 0 100.896

DC98-38-208 Fosters py 136 0 0.147 0.115 47.355 54.152 0.073 0 0 0.008 0 0.046 0.016 0.042 101.954

DC98-38-208 Fosters py 140 0.045 0.228 0.23 46.482 53.751 0.162 0 0 0.02 0 0.009 0 0.004 100.931

DC98-38-208 Fosters py 151 0.008 0.251 0.207 46.806 53.538 0 0.01 0.016 0.002 0.013 0.015 0.024 0 100.89

DC98-38-208 Fosters py 152 0 0.144 0.052 47.271 54.463 0.358 0 0.004 0 0 0.039 0 0 102.331

DC98-38-208 Fosters py 170 0 0.125 0.15 47.137 54.096 0.445 0 0 0 0 0.055 0.054 0 102.062

DC98-38-208 Fosters py 177 0.103 0.197 0.216 46.959 54.297 0.28 0.014 0 0 0.01 0.045 0.101 0 102.222

DC98-38-208 Fosters py 181 0 0.135 0.288 46.738 54.125 0.619 0 0.02 0 0.004 0.008 0.105 0 102.042

DC98-60-128.9 Fosters py 104 0 0.123 0.01 47.36 53.996 0 0.028 0 0.017 0.028 0.04 0.011 0 0.001 0 101.614

DC98-60-128.9 Fosters py 105 0 0.206 0.008 47.3 53.98 0.247 0.008 0 0.005 0.034 0.056 0 0 0 0 101.844

DC98-60-128.9 Fosters py 111 0 0.149 0.058 47.231 53.931 0 0 0 0 0 0.015 0.002 0.015 0 0.009 101.41

DC98-60-128.9 Fosters py 112 0 0.089 0.059 47.467 53.722 0 0 0 0 0 0.035 0 0 0.008 0.017 101.397

DC98-60-128.9 Fosters py 118 0.037 0.286 0.076 47.058 53.693 0.156 0 0 0.011 0.022 0.082 0.007 0.002 0 0 101.43

DC98-60-128.9 Fosters py 133 0 0.155 0.005 47.464 53.821 0.09 0 0.005 0.007 0 0 0.014 0 0 0.029 101.59

DC98-60-128.9 Fosters py 134 0 0.15 0 47.497 54.025 0.041 0.002 0 0.003 0.011 0.038 0 0.004 0 0 101.771

DC98-60-128.9 Fosters py 143 0 0.104 0 47.217 53.456 0.098 0 0 0 0 0.037 0 0.013 0 0.015 100.94

DC98-60-128.9 Fosters py 144 0 0.144 0 47.3 54.011 0.164 0.013 0.005 0.001 0.013 0.064 0.009 0 0 0.014 101.738

DC98-60-128.9 Fosters py 145 0 0.107 0 47.517 53.757 0.107 0.011 0.004 0 0 0.021 0 0 0.009 0.011 101.544

DC98-60-79 Fosters py 58 0 0.125 0.044 46.441 53.774 0.143 0 0.005 0.001 0.03 0.052 0 0 0 0 100.615

DC98-60-79 Fosters py 64 0 0.138 0.063 46.898 53.721 0.111 0 0.028 0.007 0.03 0.058 0.003 0.016 0 0.029 101.102

DC98-60-79 Fosters py 68 0.002 0.14 0.041 46.739 53.901 0.149 0.018 0.001 0.032 0.014 0.106 0 0.011 0 0.001 101.155

DC98-60-79 Fosters py 72 0 0.174 0.101 47.059 53.52 0 0.005 0 0 0.021 0.056 0.013 0.001 0 0 100.95

DC98-60-79 Fosters py 78 0 0.213 0.011 46.885 53.261 0.147 0.008 0 0.006 0 0.01 0 0.007 0 0.01 100.558

DC98-60-79 Fosters py 80 0.025 0.207 0.016 46.991 54.418 0.358 0 0 0.014 0 0.019 0 0.014 0 0 102.062

DC98-60-79 Fosters py 85 0 0.208 0.117 46.752 53.62 0.124 0.004 0 0 0 0 0 0.009 0 0 100.834

DC98-60-79 Fosters py 92 0 0.132 0.024 47.017 54.004 0.393 0.018 0.014 0 0 0.053 0 0.027 0.011 0 101.693

DC98-60-79 Fosters py 96 0 0.122 0 47.062 53.968 0.064 0.007 0.011 0.004 0 0.074 0 0 0 0 101.312

DC98-60-79 Fosters py 99 0.498 0.245 0.209 46.561 53.469 0 0 0 0 0 0.04 0.04 0 0.019 0 101.081

DC98-60-80 Fosters py 5 0 0.217 0.06 46.879 53.627 0.333 0.03 0 0.004 0.015 0.039 0 0.001 0 0.011 101.216

DC98-60-80 Fosters py 6 0 0.183 0.012 46.622 53.908 0.261 0.007 0 0.006 0.003 0.021 0.008 0.021 0.02 0 101.072

DC98-60-80 Fosters py 9 0 0.169 0.041 46.939 53.926 0.337 0.009 0.012 0.002 0.023 0.047 0.009 0 0 0 101.514

DC98-51-379 Lago py 34 0.307 0.156 0 46.729 53.961 0.071 0 0.014 0.016 0 0.046 0 0 101.3

DC98-51-379 Lago py 35 0.062 0.135 0.018 46.697 53.864 0 0 0.006 0.018 0.002 0.057 0 0.037 100.896

DC98-51-379 Lago py 38 0.01 0.197 0 46.68 54.158 0.083 0 0 0 0.028 0.083 0 0 101.239

DC98-51-379 Lago py 47 0 0.172 0.009 44.646 53.924 0.133 0.018 0.003 0.013 0 0.07 0.006 0 98.994

DC98-51-379 Lago py 48 0 0.193 0.141 46.484 53.182 0.229 0.006 0.006 0.005 0 0.043 0.007 0 100.296

DC98-51-379 Lago py 49 0.056 0.101 0 46.466 54.02 0 0 0 0.005 0.029 0.06 0 0 100.737

DC98-51-379 Lago py 50 0 0.139 0.065 46.823 54.293 0.012 0 0.017 0 0.014 0.066 0 0 101.429

DC98-51-379 Lago py 51 0.302 0.224 0.533 46.035 52.953 0.008 0 0.007 0 0.004 0.036 0 0 100.102

DC98-51-379 Lago py 55 0.037 0.206 0.092 47.064 54.146 0.181 0 0 0 0.007 0.043 0.003 0 101.779

DC98-51-379 Lago py 56 0 0.172 1.228 46.608 52.782 0.09 0.02 0 0 0 0.001 0 0 100.901

DC98-51-379 Lago py 57 0.071 0.301 0 46.706 53.864 0.116 0 0.009 0.013 0.042 0.054 0.01 0 101.186

DC98-51-379 Lago py 58 0.027 0.228 0.004 46.815 54.106 0.065 0 0.007 0.001 0 0.078 0.007 0 101.338

DC98-51-379 Lago py 59 0 0.169 0.035 46.865 53.911 0 0 0 0.004 0.01 0.037 0 0 101.031

DC98-51-379 Lago py 60 0 0.181 0.642 46.927 53.573 0 0 0.003 0 0 0.04 0.02 0 101.386

DC98-51-379 Lago py 61 0 0.149 0.458 46.417 53.427 0.109 0.004 0.002 0 0.005 0.014 0 0 100.585

DC98-51-379 Lago py 62 0.058 0.188 0.002 47.102 53.832 0 0 0.017 0 0.006 0.067 0 0 101.272

DC98-51-379 Lago py 63 0.034 0.19 0.034 46.51 54.215 0 0 0.001 0.008 0 0.023 0.007 0 101.022

DC98-51-379 Lago py 64 0 0.192 0.044 46.612 53.994 0.008 0.002 0.005 0 0.003 0.021 0 0 100.881

DC98-51-379 Lago py 65 0 0.123 0.063 46.142 53.786 0.457 0.002 0.012 0 0.02 0.073 0 0 100.678

29
Table 6 (continued). Complete electron microprobe analyses of sulfide minerals from the Bonnifield district, Alaska. 

Sample Deposit or 

Zone Min. Analysis No. Cu Pb As Fe S Zn Cd Se Mn Ag Co Sb Ni Hg Sn Total 

DC98-51-379 Lago py 69 0.054 0.181 0.044 47.123 53.93 0 0.007 0.01 0.007 0.016 0.019 0 0 101.391

DC98-51-379 Lago py 70 0 0.173 1.174 46.35 53.074 0 0.013 0 0.02 0 0.053 0.029 0 100.886

DC98-51-379 Lago py 71 0 0.186 0.468 46.892 53.644 0 0 0.001 0 0.009 0.088 0 0 101.288

DC98-51-379 Lago py 72 0 0.219 0.047 46.933 53.753 0.098 0 0 0 0 0.065 0 0 101.115

DC98-51-379 Lago py 77 0.045 0.195 0.054 46.802 53.586 0.323 0.015 0.003 0.012 0.039 0.035 0 0 101.109

DC98-51-379 Lago py 84 0 0.193 0 46.975 53.842 0.113 0.001 0 0.008 0 0.026 0 0 101.158

DC98-51-379 Lago py 85 0 0.186 1.131 46.735 53.25 0.155 0.013 0.012 0.001 0.006 0.064 0.011 0 101.564

DC98-51-379 Lago py 88 0.016 0.179 0.003 47.184 53.9 0.054 0.002 0.003 0 0 0.053 0 0 101.394

DC98-51-379 Lago py 100 0 0.136 0 46.929 54.086 0 0 0.007 0.023 0.03 0.063 0 0 101.274

97ADb58b WTF py 31 0 0.145 0.002 46.383 54.659 0.004 0 0.021 0 0.037 0.035 0 0.03 0 101.316

97ADb58b WTF py 32 0 0.402 0.165 46.918 53.22 0.026 0.024 0 0.016 0.007 0.083 0.02 0 0 100.881

97ADb58b WTF py 33 0 0.174 0.185 46.734 54.153 0.047 0.011 0.01 0 0 0.042 0.011 0 0 101.367

97ADb58b WTF py 35 0 0.195 0.017 46.599 53.556 0.076 0 0.018 0 0 0.065 0.011 0 0 100.537

97ADb58b WTF py 36 0 0.236 0.581 46.644 53.197 0 0.02 0.006 0 0 0.02 0 0 0 100.704

97ADb58b WTF py 39 0.08 0.193 0.031 46.301 53.496 0.112 0 0.011 0 0.009 0.002 0 0.014 0 100.249

97ADb58b WTF py 47 0 0.171 0.051 46.78 53.776 0.492 0.009 0 0 0.033 0 0.001 0 0 101.313

97ADb58b WTF py 50 0.039 0.23 0.101 45.74 53.39 0 0 0.027 0.001 0.017 0.059 0.041 0.003 0 99.648

97ADb58b WTF py 60 0.025 0.921 0.798 45.907 52.822 0 0.014 0 0 0 0.041 0.02 0 0 100.548

97ADb58b WTF py 61 0.041 0.148 0.057 46.442 54.062 0.387 0 0 0 0 0.031 0.012 0 0 101.18

97ADb58b WTF py 66 0.025 0.198 0.052 46.322 53.942 0.1 0.031 0.021 0 0 0.024 0.03 0 0 100.745

97ADb58b WTF py 69 0.03 0.119 0.022 46.67 53.98 0.047 0 0.005 0.013 0.022 0.07 0 0.005 0 100.983

97ADb58b WTF py 70 0.003 0.159 0.037 46.528 53.737 0 0.007 0 0 0.015 0.006 0.003 0.003 0 100.498

97ADb58b WTF py 72 0.009 0.155 0.287 46.263 53.538 0.097 0 0.009 0 0 0.041 0 0 0.011 100.41

97ADb58b WTF py 78 0.065 0.36 0.251 46.243 53.499 0.224 0.029 0 0.013 0.03 0.02 0.039 0 0 100.773

97ADb58b WTF py 79 0.065 0.176 0.143 46.33 52.995 0.11 0 0 0.034 0 0.036 0 0.017 0 99.906

97ADb58b WTF py 80 0.039 0.145 1.634 46.417 52.657 0 0 0 0.023 0.029 0.036 0.018 0 0 100.998

97ADb58b WTF py 81 0 0.257 0.016 47.044 53.467 0.066 0 0.01 0 0.044 0.018 0.011 0 0 100.933

97ADb58f WTF py 26 0 0.187 0.113 46.386 53.961 0 0.004 0.007 0 0 0.124 0.003 0.007 0 0.024 100.816

97ADb58f WTF py 27 0.002 0.16 0.03 46.968 53.637 0.03 0 0 0.007 0 0.029 0 0.014 0 0 100.877

97ADb58f WTF py 32 0 0.138 0.019 46.799 53.668 0.106 0 0.02 0 0.015 0.083 0 0 0 0.021 100.869

97ADb58f WTF py 33 0 0.192 0.229 46.501 53.067 0.121 0.014 0.004 0.016 0.001 0.078 0 0.02 0 0 100.243

97ADb58f WTF py 39 0.083 0.15 0.661 46.463 53.202 0.032 0 0.022 0.006 0 0.045 0.003 0.027 0 0.02 100.714

97ADb58f WTF py 40 0 0.209 0.005 46.172 53.411 0.034 0 0 0 0.012 0.064 0.015 0 0 0 99.922

97ADb58f WTF py 43 0 0.237 0.036 46.598 53.769 0.064 0.022 0 0 0 0.042 0 0.005 0 0.02 100.793

97ADb58f WTF py 49 0.071 0.231 0.012 46.415 53.896 0.127 0.018 0.015 0 0 0.066 0.002 0.014 0 0.005 100.872

97ADb58f WTF py 52 0 0.199 0.024 46.397 53.431 0.189 0.006 0 0 0.019 0.068 0 0 0.012 0 100.345

97ADb58f WTF py 53 0.091 0.218 0.011 46.769 53.628 0 0 0 0 0.021 0.099 0.004 0.02 0 0 100.861

97ADb58f WTF py 57 0.237 0.21 0.19 46.314 53.034 0.098 0 0 0.003 0.034 0.039 0 0 0 0.007 100.166

97ADb58g WTF py 85 0.005 0.177 0.014 46.594 53.545 0.399 0 0.001 0.012 0 0.099 0 0 0 100.846

97ADb58g WTF py 88 0.031 0.099 0.643 46.546 53.424 0 0 0.003 0.004 0 0.012 0 0.005 0 100.767

97ADb58g WTF py 90 0 0.162 0.046 46.175 53.628 0.397 0 0 0 0 0.05 0 0.004 0 100.462

97ADb58g WTF py 91 0 0.159 0.032 46.137 53.655 0.42 0 0.014 0 0.022 0.046 0.014 0.005 0 100.504

97ADb58g WTF py 99 0.028 0.209 0.008 46.399 52.948 0.068 0.028 0.01 0 0 0.055 0 0 0.041 99.794

97ADb58g WTF py 107 0 0.331 0.142 46.4 53.567 0.083 0.006 0 0.024 0 0.027 0 0 0 100.58

97ADb58g WTF py 109 0 0.155 0.021 46.52 53.852 0 0 0 0.006 0 0.025 0 0 0 100.579

97ADb58g WTF py 113 0 0.116 0.027 46.204 53.423 0.643 0.011 0 0.002 0 0.072 0.007 0 0 100.505

97ADb58g WTF py 114 0.025 0.113 0.081 46.697 53.766 0.011 0.03 0.026 0 0.002 0.041 0.017 0.018 0.008 100.835

97ADb58g WTF py 115 0 0.241 2.109 45.572 51.783 0.041 0.011 0 0.006 0.049 0.059 0.036 0.012 0 99.919

97ADb58g WTF py 118 0 0.092 0.031 46.237 53.526 0.631 0 0 0 0 0.049 0 0.015 0 100.581

97ADb58g WTF py 119 0 0.167 0.37 46.263 53.282 0.074 0.014 0.009 0.002 0 0.048 0 0 0 100.229

97ADb65b AM sl 62 0 0.152 0.015 2.366 33.133 66.264 0.112 0 0 0 0 0.014 0 0 0.02 102.076

97ADb65b AM sl 63 0 0.1 0 2.484 33.429 67.084 0.08 0 0.003 0.014 0.013 0 0 0 0 103.207

30
Table 6 (continued). Complete electron microprobe analyses of sulfide minerals from the Bonnifield district, Alaska. 

Sample Deposit or 

Zone Min. Analysis No. Cu Pb As Fe S Zn Cd Se Mn Ag Co Sb Ni Hg Sn Total 

97ADb65b AM sl 64 0.172 0.218 0 2.491 33.436 66.781 0.092 0.008 0.01 0.039 0 0.001 0.019 0 0 103.267

97ADb65b AM sl 70 0 0.163 0 2.167 32.91 66.304 0.093 0 0.005 0 0.008 0 0 0 0.02 101.67

97ADb65b AM sl 77 0 0.089 0.001 2.398 32.866 65.942 0.093 0 0 0 0 0 0.002 0.005 0 101.396

97ADb65b AM sl 81 0 0.133 0 2.116 32.919 66.892 0.114 0 0.005 0.025 0 0 0 0 0.03 102.234

97ADb65b AM sl 84 0 0.145 0 2.32 33.254 66.977 0.091 0.002 0.001 0.004 0 0.018 0 0 0.004 102.816

97ADb65b AM sl 89 0.188 0.08 0 2.781 33.58 66.952 0.085 0.002 0.009 0.045 0.002 0.03 0.025 0 0.004 103.783

97ADb65b AM sl 90 0.091 0.142 0.017 1.703 33.436 67.549 0.123 0.033 0 0 0 0 0.018 0 0 103.112

97ADb65b AM sl 93 0.191 0.082 0.003 1.597 32.938 67.086 0.131 0.016 0.001 0.034 0.009 0.015 0.021 0 0.017 102.141

AM98-1-108 AM sl 60 0.037 0.124 0.01 3.819 33.098 64.349 0.175 0.009 0.004 0 0 0 0 0 0.024 101.649

AM98-1-108 AM sl 61 0.368 0.161 0.006 4.536 33.179 61.374 0.19 0 0 0 0 0.011 0.017 0.007 0 99.849

AM98-1-108 AM sl 62 0.054 0.14 0.006 3.824 33.072 63.603 0.209 0 0 0 0.055 0 0 0.088 0.028 101.079

AM98-1-108 AM sl 70 0.16 0.069 0 1.055 33.091 65.726 0.158 0.009 0 0.028 0.006 0 0.028 0 0 100.33

AM98-1-108 AM sl 71 0.112 0.133 0 1.236 33.239 66.708 0.173 0 0 0 0 0.001 0 0.055 0 101.657

AM98-1-108 AM sl 77 0.337 0.104 0 1.347 33.285 67.042 0.204 0.018 0.018 0 0 0 0 0.015 0.035 102.405

AM98-1-108 AM sl 78 0.878 0.06 0.02 2.003 33.07 65.399 0.157 0.011 0.01 0.022 0.028 0.009 0.012 0 0 101.679

AM98-1-108 AM sl 80 0.202 0.157 0 1.549 33.078 66.76 0.19 0 0.016 0.023 0.015 0.009 0.008 0 0 102.007

AM98-1-108 AM sl 82 0.034 0.116 0.001 1.231 33.098 66.609 0.155 0.003 0.014 0.005 0 0 0 0 0.01 101.276

AM98-1-108 AM sl 85 0.445 0.106 0 1.525 33.774 66.546 0.186 0.009 0.007 0 0 0.007 0 0.012 0 102.617

AM98-1-108 AM sl 86 0.323 0.104 0 1.244 33.23 66.139 0.185 0 0 0.02 0.045 0 0.001 0.009 0 101.3

AM98-1-108 AM sl 87 0.184 0.129 0.001 1.163 33.032 65.62 0.149 0.007 0.011 0.014 0 0.005 0.011 0 0 100.326

AM98-1-108 AM sl 95 0.211 0.044 0 1.472 32.724 65.978 0.187 0 0 0 0 0.011 0 0.022 0 100.649

AM98-1-108 AM sl 97 0.704 0.101 0 1.606 33.153 63.545 0.178 0 0.013 0.002 0 0 0 0 0 99.302

AM98-1-201 AM sl 89 0.216 0 0 1.571 33.451 66.386 0.071 0 0.007 0 0.033 0.001 0.021 0 101.757

AM98-1-201 AM sl 91 0.3 0.11 0.017 1.819 33.227 66.704 0.092 0 0.013 0.009 0 0 0 0 102.291

AM98-1-201 AM sl 98 0.101 0.1 0.005 2.182 33.289 67.216 0.034 0 0.015 0.033 0 0.01 0 0 102.985

AM98-1-201 AM sl 103 0.197 0.079 0.012 1.853 33.125 65.366 0.075 0 0.017 0.036 0 0.021 0 0.063 100.844

AM98-1-201 AM sl 108 0.144 0.05 0 1.622 32.941 66.319 0.071 0 0 0.029 0.014 0 0 0.023 101.213

AM98-1-201 AM sl 115 0.031 0.121 0.004 1.714 32.81 66.295 0.061 0 0.013 0.023 0.024 0.001 0.001 0.026 101.124

AM98-1-201 AM sl 118 0 0.143 0 2.545 33.478 66.038 0.061 0.006 0 0 0.046 0 0.025 0.002 102.344

AM98-1-201 AM sl 129 0 0.081 0 2.849 33.267 65.191 0.089 0 0.009 0 0.026 0.032 0.001 0 101.545

AM98-1-201 AM sl 130 0 0.077 0.003 2.907 33.667 65.833 0.092 0.004 0 0.048 0.008 0.029 0.02 0 102.688

AM98-1-201 AM sl 131 0 0.082 0 1.946 33.158 66.357 0.086 0.008 0 0.018 0.007 0.004 0.004 0.005 101.675

AM98-1-201 AM sl 132 0.057 0.102 0.01 1.666 33.227 67.156 0.12 0 0 0.036 0 0 0.007 0 102.381

AM98-5-212 AM sl 34 0.293 0.101 0 1.578 33.498 64.883 0.127 0.014 0.004 0 0 0 0 0 100.498

AM98-5-212 AM sl 36 0.397 0.137 0 1.157 33.156 64.103 0.111 0 0 0.032 0.028 0 0 0.037 99.158

AM98-5-212 AM sl 40 0.057 0.126 0.002 1.704 33.089 64.055 0.114 0.008 0.015 0.007 0 0 0 0 99.177

AM98-5-212 AM sl 41 0.182 0.184 0.006 2.032 33.146 65.281 0.083 0.014 0.034 0.025 0.038 0 0.023 0 101.048

AM98-5-212 AM sl 45 0.281 0.128 0.022 1.067 33.105 66.542 0.179 0.006 0 0 0.014 0.012 0 0 101.356

AM98-5-212 AM sl 48 1.157 0.115 0 2.025 33.189 63.613 0.152 0.018 0 0.014 0.017 0.001 0.003 0.032 100.336

AM98-5-212 AM sl 50 0.793 0.101 0 1.675 33.311 65.23 0.15 0 0.006 0 0.013 0 0 0.016 101.295

AM98-5-212 AM sl 51 0.366 0.094 0.011 1.676 33.165 64.485 0.144 0.018 0.023 0.01 0.024 0 0 0 100.016

AM98-5-212 AM sl 57 1.127 0.128 0 1.816 33.451 64.285 0.125 0 0.01 0 0.009 0 0 0.048 100.999

AM98-5-212 AM sl 63 0.721 0.116 0 1.835 32.776 62.334 0.129 0.038 0 0.006 0 0 0.005 0 97.96

AM98-5-212 AM sl 66 1.398 0.185 0 2.64 32.973 60.575 0.128 0 0.001 0.03 0.01 0.024 0 0.01 97.974

AM98-5-212 AM sl 72 0.677 0.14 0 1.4 33.056 64.123 0.158 0.002 0 0.023 0.034 0.016 0.024 0 99.653

AM98-5-212 AM sl 73 0.48 0.062 0.011 2.264 32.861 63.581 0.147 0.012 0.024 0.015 0.045 0.02 0 0 99.522

AM98-5-212 AM sl 75 0.115 0.169 0 4.999 33.746 60.938 0.082 0.017 0.027 0 0 0 0 0 100.093

AM98-5-212 AM sl 76 0.748 0.173 0 2.215 33.289 63.712 0.115 0 0 0.009 0.033 0 0.006 0.03 100.33

AM98-5-212 AM sl 77 0.218 0.217 0 1.43 33.129 64.07 0.125 0.012 0.003 0.009 0.014 0.014 0.032 0 99.273

AM98-5-212 AM sl 78 0.239 0.155 0 2.07 33.159 63.566 0.066 0.015 0 0.044 0.05 0.001 0 0 99.365

AM98-5-212 AM sl 79 0.197 0.173 0 1.29 32.805 65.016 0.103 0 0.029 0.029 0.003 0.008 0 0 99.653

AM98-5-212 AM sl 80 0.102 0.131 0 2.886 32.975 63.411 0.097 0.021 0.014 0.025 0 0 0 0.012 99.674

31
Table 6 (continued). Complete electron microprobe analyses of sulfide minerals from the Bonnifield district, Alaska. 

Sample Deposit or 

Zone Min. Analysis No. Cu Pb As Fe S Zn Cd Se Mn Ag Co Sb Ni Hg Sn Total 

DC97-36-190 DC South sl 49 0.134 0.17 0 2.748 33.956 64.687 0.199 0 0.023 0.016 0 0.019 0 101.952

DC97-36-190 DC South sl 50 0.018 0.099 0.002 2.658 33.827 64.576 0.195 0 0.024 0 0 0.021 0 101.42

DC97-36-190 DC South sl 51 0 0.082 0 2.413 33.644 63.875 0.173 0 0.061 0.013 0.009 0 0.026 100.296

DC97-36-190 DC South sl 54 0.012 0.088 0.004 2.469 33.832 65.682 0.174 0 0.023 0 0 0 0 102.284

DC97-36-190 DC South sl 78 0 0.091 0 3.164 33.967 64.733 0.209 0.01 0.033 0.035 0 0.037 0 102.279

DC97-36-190 DC South sl 84 0 0.091 0 2.607 33.677 65.883 0.183 0 0.016 0 0.039 0.002 0 102.498

DC97-36-190 DC South sl 85 0 0.152 0.023 2.636 33.856 64.441 0.188 0.019 0.036 0.032 0 0.024 0 101.407

DC97-36-190 DC South sl 86 0.011 0.135 0 2.53 33.739 64.321 0.154 0.01 0 0 0 0 0 100.9

DC97-36-190 DC South sl 87 0 0.088 0.025 2.752 33.832 65.276 0.191 0 0.04 0.004 0 0.02 0 102.228

DC97-36-190 DC South sl 115 0 0.106 0.011 2.715 33.832 64.976 0.196 0 0.006 0.014 0 0.01 0 101.866

DC97-36-190 DC South sl 116 0.078 0.127 0 2.677 33.717 64.701 0.217 0 0.025 0 0 0 0 101.542

DC97-36-190 DC South sl 118 0 0.072 0.004 2.738 34.076 65.5 0.195 0 0.013 0.007 0 0 0.011 102.616

DC97-36-190 DC South sl 119 0 0.059 0 2.714 33.796 64.377 0.208 0.003 0.017 0.039 0 0.016 0 101.229

DC97-36-190 DC South sl 123 0.748 0.115 0 3.683 33.939 63.47 0.193 0.001 0.022 0 0 0 0.028 102.199

DC97-36-190 DC South sl 124 0 0.102 0 2.534 34.217 65.281 0.14 0 0.003 0.011 0.006 0.012 0 102.306

DC97-36-190 DC South sl 125 0.011 0.101 0.012 2.523 33.97 65.661 0.156 0.025 0.017 0.012 0 0 0.004 102.492

DC97-36-190 DC South sl 130 0.005 0.105 0 2.587 34.096 64.135 0.191 0.021 0.007 0.007 0.001 0.008 0 101.163

DC97-36-190 DC South sl 141 0 0.116 0.016 2.589 34.064 66.074 0.172 0 0.026 0 0.018 0.036 0 103.111

DC97-36-190 DC South sl 144 0 0.091 0 2.898 33.78 64.504 0.211 0 0.017 0 0 0 0 101.501

DC97-36-190 DC South sl 148 0 0.064 0 3.648 33.617 63.719 0.171 0.013 0.004 0.017 0.027 0 0 101.28

DC97-36-190 DC South sl 149 0 0.072 0 2.622 33.818 64.132 0.236 0.008 0.036 0.01 0.001 0 0 100.935

DC97-9-170A Discovery sl 151 0 0.134 0.017 2.093 33.841 64.837 0.068 0.013 0.008 0.019 0 0 0 101.03

DC97-9-170A Discovery sl 152 0.024 0.102 0.021 1.838 33.96 65.355 0.059 0 0.026 0 0.031 0 0 101.416

DC97-9-170A Discovery sl 153 0.034 0.178 0 1.907 33.238 64.81 0.28 0.019 0.013 0.005 0 0 0 100.484

DC97-9-170A Discovery sl 158 0.01 0.076 0.021 1.537 34.322 67.04 0.044 0.022 0 0 0.007 0 0 103.079

DC97-9-170A Discovery sl 161 0.109 0.122 0 1.654 34.005 65.395 0.045 0 0.011 0 0 0.006 0 101.347

DC97-9-170A Discovery sl 164 0.071 0.123 0 1.547 33.859 65.269 0.066 0 0 0.05 0.004 0 0.029 101.018

DC97-9-170A Discovery sl 170 0 0.106 0 1.62 33.666 66.367 0.041 0.007 0.022 0 0.039 0 0 101.868

DC97-9-170A Discovery sl 171 0.029 0.158 0.013 1.665 33.702 67.559 0.042 0.002 0 0 0 0.009 0.014 103.193

DC97-9-170A Discovery sl 172 0.102 0.085 0 1.656 33.799 66.399 0.063 0.001 0.026 0.001 0.002 0.003 0.019 102.156

DC97-9-170A Discovery sl 177 0.093 0.133 0.011 2.117 33.756 65.983 0.102 0.012 0.008 0 0.018 0.002 0 102.235

DC98-38-208 Fosters sl 123 0 0.115 0 1.628 34.042 64.873 0.179 0.01 0.038 0.052 0.018 0.032 0.001 100.988

DC98-38-208 Fosters sl 132 0 0.122 0.001 1.903 34.323 64.982 0.155 0.021 0.058 0.016 0.001 0 0 101.582

DC98-38-208 Fosters sl 133 0.005 0.027 0 1.777 33.913 65.045 0.115 0 0.024 0 0.005 0 0.02 100.931

DC98-38-208 Fosters sl 134 0 0.14 0 1.891 34.007 65.643 0.095 0 0.021 0.029 0 0.011 0 101.837

DC98-38-208 Fosters sl 135 0 0.084 0 1.803 33.877 65.067 0.16 0 0.052 0.03 0 0.01 0.01 101.093

DC98-38-208 Fosters sl 144 0.039 0.078 0 1.843 34.219 64.692 0.151 0.001 0.022 0 0.009 0.008 0 101.062

DC98-38-208 Fosters sl 145 0 0.086 0 1.885 33.866 64.165 0.137 0.011 0.027 0 0 0 0 100.177

DC98-38-208 Fosters sl 148 0 0.141 0 1.785 33.9 66.113 0.153 0 0.051 0 0 0.01 0 102.153

DC98-38-208 Fosters sl 149 0 0.098 0 1.727 34.532 65.324 0.129 0 0.034 0.028 0 0.003 0 101.875

DC98-38-208 Fosters sl 153 0 0.119 0 1.984 33.877 65.114 0.119 0.003 0.069 0.014 0 0 0.004 101.303

DC98-38-208 Fosters sl 158 0 0.057 0.019 1.938 34.131 65.686 0.104 0.017 0.039 0.044 0.007 0 0 102.042

DC98-38-208 Fosters sl 162 0.053 0.089 0.009 1.806 34.026 66.255 0.175 0.019 0.029 0.027 0 0.026 0.008 102.522

DC98-38-208 Fosters sl 163 0.054 0.103 0 1.972 33.853 67.256 0.164 0 0.049 0 0 0.011 0 103.462

DC98-38-208 Fosters sl 166 0 0.075 0.008 1.934 34.2 66.49 0.158 0 0.092 0.001 0.023 0.027 0 103.008

DC98-38-208 Fosters sl 171 0 0.161 0 1.929 33.876 65.379 0.153 0.001 0.071 0 0.024 0 0 101.594

DC98-38-208 Fosters sl 174 0.08 0.155 0 1.959 33.811 66.328 0.156 0 0.035 0 0.015 0.01 0.015 102.564

DC98-38-208 Fosters sl 178 0 0.063 0 1.855 34.191 65.584 0.176 0 0.059 0.034 0 0 0 101.962

DC98-38-208 Fosters sl 182 0 0.06 0.026 1.805 33.978 67.157 0.128 0.02 0.03 0.003 0 0 0.008 103.215

DC98-60-128.9 Fosters sl 106 0 0.049 0 1.541 33.125 66.896 0.199 0.026 0.017 0 0 0.015 0.003 0 0.006 101.877

DC98-60-128.9 Fosters sl 107 0 0.104 0.019 1.829 32.957 66.919 0.136 0 0.047 0.028 0 0 0 0 0 102.039

DC98-60-128.9 Fosters sl 108 0 0.11 0 1.896 33.182 66 0.158 0.032 0.035 0.041 0 0 0 0 0 101.454

32
Table 6 (continued). Complete electron microprobe analyses of sulfide minerals from the Bonnifield district, Alaska. 

Sample Deposit or 

Zone Min. Analysis No. Cu Pb As Fe S Zn Cd Se Mn Ag Co Sb Ni Hg Sn Total 

DC98-60-128.9 Fosters sl 109 0 0.051 0.009 1.901 33.334 66.599 0.189 0 0.029 0.018 0 0 0.013 0 0 102.143

DC98-60-128.9 Fosters sl 123 0.042 0.086 0 1.51 32.91 67.069 0.175 0 0.003 0 0.054 0.012 0 0 0.038 101.899

DC98-60-128.9 Fosters sl 124 0 0.149 0 1.792 33.124 67.41 0.138 0 0.057 0 0.002 0 0.016 0 0 102.688

DC98-60-128.9 Fosters sl 127 0 0.099 0.021 1.703 33.076 66.678 0.168 0 0.017 0.013 0 0 0.013 0 0 101.788

DC98-60-128.9 Fosters sl 130 0 0.117 0 1.788 33.314 66.136 0.176 0.023 0.054 0 0 0.004 0.016 0 0.033 101.661

DC98-60-128.9 Fosters sl 136 0.003 0.064 0.016 1.819 33.243 66.688 0.198 0 0.021 0 0.002 0 0 0 0.011 102.065

DC98-60-128.9 Fosters sl 142 0 0.071 0 1.961 33.051 66.546 0.156 0.024 0.028 0 0 0 0 0.02 0 101.857

DC98-60-128.9 Fosters sl 150 0 0.092 0 1.953 33.133 67.41 0.182 0 0.014 0.043 0.025 0 0 0 0.025 102.877

DC98-60-79 Fosters sl 57 0 0.136 0 1.789 33.233 65.471 0.182 0 0.033 0 0.004 0.019 0.007 0.004 0.02 100.898

DC98-60-79 Fosters sl 63 0.016 0.159 0 1.968 33.089 64.523 0.189 0.002 0.044 0 0 0 0 0 0 99.99

DC98-60-79 Fosters sl 73 0.036 0.148 0 2.383 33.049 64.794 0.192 0 0.018 0 0 0.005 0.05 0 0 100.675

DC98-60-79 Fosters sl 74 0 0.133 0 2.314 33.291 65.937 0.181 0 0.023 0 0 0.001 0 0 0.042 101.922

DC98-60-79 Fosters sl 75 0.052 0.049 0 2.152 32.948 65.401 0.151 0 0.029 0.028 0 0 0 0.065 0 100.875

DC98-60-79 Fosters sl 79 0 0.045 0 2.487 33.078 65.725 0.163 0.013 0.018 0 0.048 0 0 0 0 101.577

DC98-60-79 Fosters sl 82 0 0.094 0.012 2.204 33.106 66.694 0.166 0 0.045 0 0.001 0.012 0.011 0 0 102.345

DC98-60-79 Fosters sl 84 0 0.099 0 2.549 33.158 66.036 0.186 0.001 0.045 0.032 0 0.027 0 0 0.019 102.152

DC98-60-79 Fosters sl 86 0 0.166 0 2.111 33.157 66.028 0.187 0 0.028 0.012 0 0 0 0 0.02 101.709

DC98-60-79 Fosters sl 94 2.443 0.095 0 3.587 33.291 63.144 0.129 0 0.01 0.028 0.015 0 0 0 0 102.742

DC98-60-79 Fosters sl 100 0.038 0.043 0 2.507 33.121 66.795 0.176 0.026 0.018 0.028 0 0.013 0 0 0 102.765

DC98-60-80 Fosters sl 2 0 0.134 0 2.97 33.718 63.931 0.131 0 0.02 0 0.008 0.019 0.005 0 0 100.936

DC98-60-80 Fosters sl 10 0 0.111 0 2.483 33.842 65.882 0.177 0.011 0.04 0 0.014 0.026 0 0 0 102.586

DC98-60-80 Fosters sl 12 0 0.136 0.023 2.902 33.664 67.088 0.17 0 0.051 0 0.028 0 0 0 0 104.062

DC98-60-80 Fosters sl 13 0.063 0.085 0 2.552 33.372 65.19 0.181 0.013 0.05 0 0.002 0.014 0.005 0 0 101.527

DC98-60-80 Fosters sl 15 0.01 0.058 0 2.691 33.245 65.283 0.164 0 0.028 0 0.015 0.01 0.016 0 0.014 101.534

DC98-60-80 Fosters sl 16 0.078 0.089 0.014 2.687 32.852 64.627 0.161 0.011 0.047 0 0 0 0 0 0 100.566

DC98-60-80 Fosters sl 17 0 0.1 0 2.727 33.317 65.835 0.165 0 0.007 0 0.045 0 0 0 0.001 102.197

DC98-60-80 Fosters sl 18 0 0.143 0 2.707 33.373 65.022 0.221 0 0.003 0 0 0.001 0 0.031 0.001 101.502

DC98-51-379 Lago sl 36 0 0.101 0.016 2.206 33.704 65.192 0.172 0 0.045 0.027 0.01 0 0 101.473

DC98-51-379 Lago sl 37 0.019 0.1 0 2.064 33.63 65.098 0.197 0.001 0.022 0.027 0 0 0 101.158

DC98-51-379 Lago sl 39 0.007 0.065 0.005 1.907 33.669 66.026 0.197 0 0.022 0 0 0 0 101.898

DC98-51-379 Lago sl 40 0 0.072 0 1.99 33.77 64.678 0.17 0 0.044 0 0 0 0 100.724

DC98-51-379 Lago sl 44 0 0.113 0.005 2.355 34.074 65.222 0.192 0 0.047 0 0 0.006 0 102.014

DC98-51-379 Lago sl 45 0 0.072 0 2.152 33.466 65.386 0.192 0.013 0.051 0.01 0 0 0 101.342

DC98-51-379 Lago sl 46 0.063 0.047 0 1.834 33.667 65.931 0.215 0.013 0.069 0.002 0.049 0.019 0.011 101.92

DC98-51-379 Lago sl 66 0.057 0.086 0 1.628 33.337 64.385 0.182 0.007 0.041 0 0 0.018 0 99.741

DC98-51-379 Lago sl 67 0 0.143 0.002 2.09 33.624 65.876 0.21 0 0.056 0.008 0.025 0.011 0 102.045

DC98-51-379 Lago sl 68 0 0.094 0 1.744 33.669 66.705 0.159 0 0.047 0 0 0.019 0.025 102.462

DC98-51-379 Lago sl 73 0 0.13 0 1.975 34.479 66.503 0.188 0 0.056 0 0 0.024 0.014 103.369

DC98-51-379 Lago sl 74 0 0.067 0.001 2.035 33.821 65.324 0.22 0.007 0.073 0.005 0 0.023 0 101.576

DC98-51-379 Lago sl 76 0 0.088 0.004 1.743 33.793 65.439 0.153 0 0.04 0 0 0 0 101.26

DC98-51-379 Lago sl 78 0 0.124 0 1.664 33.83 65.931 0.197 0 0.049 0 0.05 0 0.011 101.856

DC98-51-379 Lago sl 83 0.01 0.095 0 2.154 33.896 66.339 0.224 0 0.046 0.007 0.004 0 0.024 102.799

DC98-51-379 Lago sl 86 0 0.093 0 2.111 33.781 65.277 0.168 0 0.054 0.009 0.005 0.018 0 101.516

DC98-51-379 Lago sl 89 0.009 0.109 0.004 1.977 33.664 65.98 0.181 0.003 0.026 0.014 0.024 0.013 0 102.004

DC98-51-379 Lago sl 95 0 0.099 0 2.104 33.719 65.216 0.205 0.001 0.071 0 0 0.001 0.002 101.418

DC98-51-379 Lago sl 96 0 0.11 0 1.821 33.876 66.305 0.178 0.02 0.067 0 0 0 0 102.377

DC98-51-379 Lago sl 97 0 0.108 0.02 1.905 33.686 65.492 0.165 0 0.035 0 0 0.027 0 101.438

DC98-51-379 Lago sl 98 0 0.135 0 1.923 33.862 64.904 0.151 0.014 0.048 0.053 0.051 0 0.003 101.144

DC98-51-379 Lago sl 99 0 0.128 0.004 1.885 33.867 65.67 0.17 0.008 0.049 0 0.015 0.018 0 101.814

DC98-51-379 Lago sl 102 0 0.129 0.009 2.163 33.875 65.603 0.174 0.011 0.068 0 0 0 0 102.032

97ADb58b WTF sl 34 0 0.147 0.011 4.227 33.614 62.91 0.205 0.01 0.083 0.012 0 0 0.005 0 101.224

97ADb58b WTF sl 37 0 0.098 0 5.22 32.93 62.364 0.195 0 0.078 0.01 0.04 0 0.01 0 100.945

33
Table 6 (continued). Complete electron microprobe analyses of sulfide minerals from the Bonnifield district, Alaska. 

Sample Deposit or 

Zone Min. Analysis No. Cu Pb As Fe S Zn Cd Se Mn Ag Co Sb Ni Hg Sn Total 

97ADb58b WTF sl 41 0 0.122 0.001 4.809 33.051 62.376 0.227 0 0.072 0.017 0 0 0.015 0.012 100.702

97ADb58b WTF sl 42 0.077 0.116 0 5.041 33.451 61.677 0.192 0.001 0.091 0.051 0 0 0.019 0 100.716

97ADb58b WTF sl 43 0.032 0.108 0.004 5.139 33.36 62.353 0.225 0.009 0.082 0.028 0.029 0.024 0.001 0 101.394

97ADb58b WTF sl 46 0.046 0.151 0 4.426 33.518 63.278 0.185 0 0.086 0 0 0.027 0.007 0 101.724

97ADb58b WTF sl 48 0 0.115 0 4.519 32.997 61.916 0.217 0 0.038 0.04 0.01 0.014 0 0 99.866

97ADb58b WTF sl 51 0 0.097 0 4.709 33.175 61.635 0.193 0.011 0.115 0.007 0 0.009 0 0 99.951

97ADb58b WTF sl 54 0.037 0.114 0 5.214 33.209 61.27 0.229 0 0.108 0 0.046 0 0 0.007 100.234

97ADb58b WTF sl 55 0.052 0.133 0 5.388 33.336 61.395 0.214 0.015 0.127 0.009 0 0.008 0 0 100.677

97ADb58b WTF sl 62 0.013 0.071 0 5.239 33.389 60.91 0.212 0.019 0.089 0.041 0.062 0 0.007 0.01 100.062

97ADb58b WTF sl 67 0 0.138 0 5.304 33.261 60.172 0.255 0.011 0.092 0 0 0.016 0 0 99.249

97ADb58b WTF sl 74 0 0.125 0 4.596 33.287 63.406 0.256 0.008 0.078 0.006 0.018 0.005 0 0 101.785

97ADb58b WTF sl 75 0 0.13 0 4.294 33.216 63.252 0.225 0.011 0.072 0.012 0.042 0.019 0 0 101.273

97ADb58b WTF sl 76 0.05 0.072 0 4.417 33.052 62.438 0.245 0.009 0.072 0 0.012 0 0 0 100.367

97ADb58b WTF sl 77 0 0.136 0 4.327 32.952 62.798 0.23 0 0.025 0 0 0 0 0.005 100.473

97ADb58b WTF sl 82 0 0.048 0 4.309 32.975 62.688 0.222 0.006 0.065 0.034 0.019 0 0.027 0 100.393

97ADb58b WTF sl 83 0 0.17 0 4.15 33.232 63.68 0.283 0.009 0.087 0.024 0.029 0.006 0 0 101.67

97ADb58f WTF sl 28 0.01 0.092 0 4.826 33.52 62.677 0.218 0 0.071 0.03 0.008 0.004 0.013 0 0 101.469

97ADb58f WTF sl 29 0 0.127 0 4.481 33.261 63.076 0.25 0 0.095 0.068 0 0.008 0.005 0 0.004 101.375

97ADb58f WTF sl 30 0 0.092 0 4.645 33.091 62.263 0.225 0 0.107 0.004 0 0 0 0 0 100.427

97ADb58f WTF sl 34 0 0.118 0 4.671 33.274 61.87 0.258 0 0.104 0.018 0.004 0.01 0.034 0.027 0 100.388

97ADb58f WTF sl 36 0.021 0.165 0 5.098 33.21 61.293 0.28 0.01 0.071 0.006 0 0 0.024 0 0.007 100.185

97ADb58f WTF sl 41 0 0.132 0.03 5.067 33.175 62.852 0.282 0 0.107 0.051 0 0.01 0 0 0 101.706

97ADb58f WTF sl 44 0 0.146 0 4.952 33.131 62.914 0.196 0.005 0.09 0 0.081 0.038 0.007 0 0 101.56

97ADb58f WTF sl 50 0.01 0.186 0 4.602 33.303 61.159 0.246 0 0.114 0 0 0 0 0 0 99.62

97ADb58f WTF sl 51 0.032 0.144 0.01 4.644 32.758 61.924 0.256 0.017 0.098 0.024 0 0 0.009 0 0 99.916

97ADb58f WTF sl 55 0 0.148 0.003 4.911 33.174 62.06 0.256 0.001 0.097 0.038 0.038 0.006 0.006 0 0 100.738

97ADb58f WTF sl 56 0 0.177 0.015 4.98 33.337 60.496 0.26 0 0.121 0 0 0.008 0.017 0.001 0 99.412

97ADb58g WTF sl 84 0 0.036 0.003 5.456 33.36 61.819 0.241 0.013 0.057 0.048 0.039 0 0.003 0 101.075

97ADb58g WTF sl 86 0 0.128 0 4.976 33.289 61.044 0.261 0.016 0.104 0.004 0.003 0 0 0 99.825

97ADb58g WTF sl 87 0 0.058 0 5.088 33.489 62.147 0.257 0 0.087 0 0.048 0.008 0 0.015 101.197

97ADb58g WTF sl 92 0 0.175 0 4.951 33.103 61.714 0.169 0 0.078 0.006 0 0 0 0 100.196

97ADb58g WTF sl 98 0 0.073 0.023 5.499 33.278 62.095 0.253 0.009 0.095 0.012 0.025 0 0 0 101.362

97ADb58g WTF sl 100 0.074 0.169 0 5.41 33.028 61.24 0.241 0.012 0.07 0 0.018 0 0.025 0 100.287

97ADb58g WTF sl 103 0.058 0.139 0.01 5.629 32.975 60.661 0.268 0 0.095 0 0.011 0.005 0 0.058 99.909

97ADb58g WTF sl 108 0 0.087 0 5.18 33.371 61.89 0.241 0.005 0.055 0.018 0 0.018 0.004 0 100.869

97ADb58g WTF sl 111 0 0.09 0.005 5.525 33.361 61.199 0.268 0 0.113 0.001 0.008 0.001 0 0 100.571

97ADb58g WTF sl 116 0 0.074 0 5.053 33.228 61.734 0.231 0.013 0.095 0 0 0.013 0 0 100.441

97ADb58g WTF sl 117 0 0.126 0.024 5.245 33.345 62.024 0.23 0.007 0.076 0.061 0 0.009 0 0 101.147

97ADb58g WTF sl 120 0 0.153 0.017 5.557 32.869 61.4 0.216 0 0.09 0.035 0.023 0.007 0 0 100.367

DC97-9-170A Discovery td 36 23.203 0.142 0.179 3.653 23.241 2.927 0 0 0.005 22.893 0.022 27.11 0 0.037 103.412

DC97-9-170A Discovery td 37 19.946 0.098 0.131 3.648 22.1 2.829 0 0 0 27.723 0.03 26.842 0 0 103.347

DC97-9-170A Discovery td 38 21.366 0.204 0.179 3.637 22.973 2.732 0 0 0.014 24.667 0 26.919 0.021 0 102.712

DC97-9-170A Discovery td 39 22.025 0.061 0.197 3.835 22.742 2.781 0 0.011 0.007 23.792 0 26.737 0.014 0.015 102.217

DC97-9-170A Discovery td 40 22.924 0.052 0.195 3.935 22.861 2.74 0 0 0.017 23.396 0.045 27.11 0.015 0.033 103.323

DC97-9-170A Discovery td 41 21.272 0.059 0.19 3.879 22.944 2.714 0 0.023 0 24.207 0.043 26.804 0 0.021 102.156

DC97-9-170A Discovery td 42 22.926 0.088 0.225 3.927 23.499 2.72 0 0 0 22.709 0.029 26.962 0.024 0 103.109

DC97-9-170A Discovery td 43 23.105 0.094 0.17 4.032 23.363 2.545 0 0 0 22.238 0.045 27.213 0.004 0.059 102.868

DC97-9-170A Discovery td 44 22.565 0.131 0.209 3.854 22.976 2.861 0 0 0 23.277 0.015 27.165 0 0.012 103.065

DC97-9-170A Discovery td 45 22.651 0.071 0.184 3.95 23.219 2.641 0 0 0.008 23.208 0.018 27.164 0 0.037 103.151

DC97-9-170A Discovery td 46 23.891 0.121 0.225 3.894 23.436 2.83 0 0 0.004 21.317 0 27.187 0 0.075 102.98

DC97-9-170A Discovery td 47 23.531 0.152 0.179 3.95 23.274 2.88 0 0.002 0.02 22.166 0.007 27.152 0 0 103.313

DC97-9-170A Discovery td 48 23.453 0.16 0.174 3.939 23.182 2.733 0 0.02 0 21.999 0 27.216 0.017 0 102.893

34
Table 6 (continued). Complete electron microprobe analyses of sulfide minerals from the Bonnifield district, Alaska. 

Sample Deposit or 

Zone Min. Analysis No. Cu Pb As Fe S Zn Cd Se Mn Ag Co Sb Ni Hg Sn Total 

DC98-38-208 Fosters td 49 31.654 0.128 0.235 3.957 24.597 3.014 0.053 0.003 0 10.282 0 28.461 0 0.045 102.429

DC98-38-208 Fosters td 50 33.48 0.073 0.702 3.674 25.09 3.532 0.011 0 0 8.281 0.006 27.974 0 0.027 102.85

DC98-38-208 Fosters td 51 33.59 0.088 0.299 3.623 24.727 3.48 0.028 0 0.027 8.874 0 28.479 0.006 0 103.221

DC98-38-208 Fosters td 52 33.214 0.082 0.366 3.7 25.139 3.535 0 0 0.014 9.035 0.005 28.097 0 0.079 103.266

DC98-38-208 Fosters td 53 34.449 0.017 1.778 3.8 25.301 3.528 0.039 0 0.035 7.541 0.049 26.459 0 0 102.996

DC98-38-208 Fosters td 54 36.099 0.114 3.11 3.975 25.781 3.43 0 0 0.014 6.329 0.022 24.176 0 0 103.05

DC98-38-208 Fosters td 55 36.071 0.126 2.966 3.917 25.634 3.373 0.026 0 0.014 6.304 0.007 24.659 0 0.028 103.125

DC98-38-208 Fosters td 56 34.553 0.063 1.747 3.816 25.244 3.511 0 0 0 7.684 0 26.167 0 0.021 102.806

DC98-38-208 Fosters td 57 34.677 0.097 1.769 4.055 25.293 3.086 0 0 0.007 7.508 0 26.147 0 0.093 102.732

DC98-38-208 Fosters td 58 34.494 0.091 1.663 4.071 25.39 3.696 0.009 0 0.009 7.393 0.011 26.597 0 0 103.424

DC98-38-208 Fosters td 59 34.481 0.08 1.442 4.04 25.436 3.243 0 0 0.009 7.777 0 26.755 0 0.043 103.306

DC98-38-208 Fosters td 60 36.993 0 4.824 4.361 25.94 3.054 0 0 0.003 5.301 0.026 21.71 0.013 0 102.225

DC98-38-208 Fosters td 61 35.728 0.093 2.991 4.134 25.53 3.376 0 0 0.009 6.405 0.006 24.417 0 0 102.689

DC98-38-208 Fosters td 62 37.69 0.074 6.183 4.097 26.418 3.237 0 0 0 4.651 0 19.935 0 0 102.285

DC98-38-208 Fosters td 63 36.845 0.043 3.481 3.892 25.915 3.42 0 0.008 0 6.097 0.022 23.732 0 0.022 103.477

DC98-38-208 Fosters td 64 35.909 0.042 3.521 4.079 25.698 3.451 0 0 0.001 6.349 0.007 23.96 0 0.017 103.034

DC98-38-208 Fosters td 65 36.391 0.069 3.383 3.918 25.724 3.35 0 0 0 6.298 0 23.925 0 0 103.058

DC98-38-208 Fosters td 66 34.629 0.096 1.575 3.877 25.372 4.201 0 0 0.007 7.958 0.002 26.487 0.023 0.006 104.233

DC98-38-208 Fosters td 67 37.347 0.012 5.225 4.287 26.159 3.181 0.031 0 0.011 5.121 0.013 21.381 0 0.026 102.794

DC98-60-79 Fosters td 59 39.384 0.104 1.344 3.499 25.609 4.084 0 0 0.008 0.703 0 24.832 0 0 0.055 99.622

DC98-60-79 Fosters td 61 39.59 0.057 1.335 3.517 25.775 3.748 0 0 0.004 0.726 0 22.145 0 0.005 0.154 97.056

DC98-60-79 Fosters td 66 38.597 0.094 1.252 3.377 25.492 3.617 0.002 0 0 0.623 0 24.79 0 0.037 0.109 97.99

DC98-60-79 Fosters td 69 39.809 0.061 1.077 3.514 25.776 3.873 0.015 0 0.014 0.683 0.082 23.897 0 0.003 0.083 98.887

DC98-60-79 Fosters td 77 39.356 0.07 1.099 3.54 25.726 3.761 0 0 0.013 0.693 0.013 29.303 0 0 0.079 103.653

DC98-60-79 Fosters td 83 39.719 0.042 1.097 3.46 25.72 4.402 0.03 0 0.036 0.667 0.017 25.914 0 0 0.092 101.196

DC98-60-79 Fosters td 93 40.184 0.093 1.087 3.557 25.614 3.936 0.025 0 0.014 0.691 0.005 29.686 0.032 0.017 0.046 104.987

DC98-60-79 Fosters td 98 39.882 0.064 0.975 3.626 25.905 4.068 0 0 0.031 0.722 0.011 25.848 0 0 0.085 101.217

35
Table 7. Trace-element contents of pyrite and sphalerite by laser ablation–inductively coupled–mass spectrometry analysis from the Bonnifield district, 

Alaska.

Sample Deposit or Zone Min. Anal No. V Mn Fe Co As Se Ag Au Hg Tl Ni Cu Ga

Reporting limit 0.227 0.458 10.5 0.104 0.826 1.60 0.100 0.101 0.865 0.0296 0.654 0.329 0.0947

97ADb58b WTF py 28 3.50 45.5 - 6.48 727 4.71 13.3 1.55 6.49 0.179 2173 0.120

97ADb58b WTF py 29 4.44 - 843 4.12 0.140 2.75 2.04 46.0

97ADb58b WTF py 30 2.37 103 - 14.7 869 9.54 13.7 1.21 4.30 0.181 4.65 2297

97ADb58b WTF py 31 0.860 17.0 - 11.2 911 2.33 18.1 0.145 3.62 0.0736 2.46 78.8

97ADb58b WTF py 32 0.953 34 - 37.4 1677 7.92 1.08 4.97 0.110 122 0.103

97ADb58b WTF py 46 1.12 - 0.296 1094 2.52 8.90 0.516 6.95 1.38 372 0.186

97ADb58b WTF py 47 3.12 - 0.248 2010 13.6 7.37 0.644 3.75 0.129 4.31 469 0.171

97ADb58b WTF py 48 4.39 59.8 - 6.77 340 29.4 3.43 7.95 0.213 37.1 171 0.507

97ADb58b WTF py 50 1.72 5.23 - 2.20 151 17.6 1.11 6.45 0.0632 36.0 15.1 0.360

97ADb58b WTF py 51 1.95 - 0.216 153 5.86 4.07 8.27 4.20 257

97ADb58b WTF py 52 3.27 33.9 - 1.06 2787 5.14 7.82 1.67 6.83 0.337 3.68 182 0.530

97ADb58b WTF py 53 1.97 85.8 - 5032 14.2 19.1 0.896 9.9 12.4 9.66 193 0.132

97ADb58b WTF py 56 1.34 4.09 - 0.444 1761 1.35 0.460 4.93 0.054 8.25 677 0.245

97ADb58b WTF py 57 0.559 11.9 - 4.24 976 3.91 8.71 0.558 2.83 0.277 17.9 2867

97ADb58b WTF py 58 0.510 8.78 - 4.23 723 6.79 1.98 0.254 3.11 0.257 19.4 195

97ADb65b AM py 65 1.38 799 - 3359 0.223 5.53 153 1.05 3.88

97ADb65b AM py 66 14.3 1534 - 38.8 5055 232 444 2.81 262 1148 514 3294 21.4

97ADb65b AM py 67 40.9 148 - 21.2 5119 556 472 3.62 66.5 781 662 16740 6.02

97ADb65b AM py 68 407 - 1.34 6862 80.1 82.1 0.646 21.1 556 58.7 8402 1.78

97ADb65b AM py 69 1.38 415 - 0.488 5595 0.866 0.391 22.6 343 28.9 22.8

97ADb65b AM py 70 1.77 782 - 8.30 4084 91.9 141 1.94 12.0 398 528 3887 0.612

AM98-1-201 AM py 71 14.4 56.2 - 64.5 1393 18.4 75.9 1.24 9.6 6.18 117 25273 4.01

AM98-1-201 AM py 72 16.2 64.2 - 48.9 866 22.2 41.1 1.29 7.69 11.2 111 5107 11.2

AM98-1-201 AM py 73 0.507 63.8 - 1.39 5188 0.805 0.211 7.31 17.8 5.70 26.8 0.104

AM98-1-201 AM py 74 18.0 3.24 - 50.1 53 18.6 13.8 0.381 6.65 0.748 13.9 515 0.572

AM98-1-201 AM py 75 3.21 910 - 10.4 7926 2.62 13.9 1.15 35.1 822 77.9 404

AM98-1-201 AM py 76 17.4 76.9 - 20.0 358 4.92 125 0.269 14.7 4.01 40.8 2379 10.7

AM98-1-201 AM py 77 1.12 330 - 4.14 12086 1.90 3.64 0.970 45.8 781 14.3 113

AM98-1-201 AM py 78 124 - 3.92 7064 7.18 0.394 4.27 0.294 5.07 147

AM98-1-201 AM py 79 47.5 16.7 - 27.9 221 12.4 24.8 0.269 2.17 1.430 36.2 5471 0.527

AM98-1-201 AM py 80 54.9 12.3 - 43.9 305 29.3 34.3 1.31 0.939 31.4 2594 0.153

 [Zone and deposit abbreviations as in Supplementary Data Table 5; py = pyrite; sp = sphalerite. Analyses made by Alan E. Koenig and Nora K. Foley. Analytical methods described in Appendix. 

Sample locations shown on Sample Location Map. All contents are in parts per million. Blank cells indicate less than the reporting limit. Dash symbol for Fe indicates Fe is not reported; 

Fe was used as the internal standard element for concentration calculations]

36
Table 7 (continued). Trace-element contents of pyrite and sphalerite by laser ablation–inductively coupled–mass spectrometry analysis from the Bonnifield 

district, Alaska.

Sample Deposit or Zone Min. Anal No. V Mn Fe Co As Se Ag Au Hg Tl Ni Cu Ga

Reporting limit 0.227 0.458 10.5 0.104 0.826 1.60 0.100 0.101 0.865 0.0296 0.654 0.329 0.0947

DC97-36-190 DC South py 81 0.932 - 44.2 5.26 2.09 82.9

DC97-36-190 DC South py 82 0.379 2.21 - 4.58 31.5 0.403 1.93 449

DC97-36-190 DC South py 83 0.992 - 0.351 9.66 0.200 0.133 1.05 0.0489 1.09 7.23

DC97-36-190 DC South py 84 5.56 - 1.78 60.4 2.03 2.70 0.923 400

DC97-36-190 DC South py 85 0.385 4.03 - 29.1 47.4 0.58 0.183 4.39 288 0.459

DC97-36-190 DC South py 86 0.694 - 17.2 5.12 134 0.156 0.758 1.21 0.102

DC97-36-190 DC South py 87 - 18.5 33.0 168 1.40 4.51

DC97-36-190 DC South py 89 0.281 - 1.31 130 1.16 0.220 1.34 0.0405 0.902 646 0.433

DC97-36-190 DC South py 90 1.03 - 12.1 53.9 112 1.48 0.109 2.64 0.153 2.69 289 0.483

DC97-36-190 DC South py 91 0.418 - 1.88 20.2 266 1.85 0.0738 2.47 540 0.106

DC97-36-190 DC South py 6 - 8.91 147 16.2 0.683 0.125 337

DC97-36-190 DC South py 7 0.489 - 2.40 2.46 0.299 2.77 1.30 37.3 0.265

DC97-36-190 DC South py 8 4.75 - 48.6 38.9 0.572 0.227 1.12 0.0418 0.970 71.1

DC97-36-190 DC South py 11 0.537 0.80 - 205 77.6 158 1.98 2.79 371

DC97-36-190 DC South py 12 0.494 - 8.24 481 0.614 0.351 1.99 0.0762 1.14 69.1

DC97-36-190 DC South py 13 2.76 - 240 31.5 62.9 0.200 0.104 2.23 0.0329 6.21

DC97-36-190 DC South py 17 0.361 - 13.6 2.74 9.92 0.138 2.12 2.60

DC97-36-190 DC South py 18 6.38 - 100 6.33 156 4.27 0.0557 2.26

DC97-36-190 DC South py 19 - 16.4 1.22 45.6 0.561 0.750 71.0

DC97-36-190 DC South py 20 0.698 - 5.15 15.8 9.70 0.232 0.90 0.0570 1.27 65.0

DC97-36-190 DC South py 21 7.93 - 4.84 71.0 30.2 177 2.67 0.121 1.26 95.4

DC97-36-190 DC South py 22 1.02 - 326 1.14 0.133 0.0839 1.09 45.3 0.335

DC97-36-190 DC South py 23 - 281 5.8 2.98 1.01 0.0521 1.74 46.1

DC97-36-190 DC South py 24 1.11 - 76.7 207 1.53

DC97-36-190 DC South py 25 0.854 - 101 57.7 30.5 0.0990 2.38 0.0729 1.30

DC97-36-190 DC South py 26 - 54.3 162 0.0565 2.22 0.206

DC98-60-128 Fosters py 27 - 0.205 87.8 0.251 1.54 0.0509 258

DC98-60-128 Fosters py 28 0.911 - 15.3 2.70 0.286 0.233 1.30 178

DC98-60-128 Fosters py 29 6.28 - 0.354 705 1.81 0.585 1.44 0.0581 48.8 0.327

DC98-60-128 Fosters py 32 10.7 - 0.512 416 0.747 0.307 0.207 69.7

DC98-60-128 Fosters py 37 9.88 - 517 0.866 1.38 0.0537 35.8 0.558

DC98-60-128 Fosters py 38 1.41 - 355 0.342 1.98 4.95 0.126

DC98-60-128 Fosters py 41 0.858 11.5 - 0.417 55.2 8.99 0.489 275

DC98-60-128 Fosters py 42 - 0.223 307 0.541 0.666 0.0748 94.4

DC98-60-128 Fosters py 43 0.398 1.36 - 841 0.995 5.83

37
Table 7 (continued). Trace-element contents of pyrite and sphalerite by laser ablation–inductively coupled–mass spectrometry analysis from the Bonnifield 

district, Alaska.

Sample Deposit or Zone Min. Anal No. V Mn Fe Co As Se Ag Au Hg Tl Ni Cu Ga

Reporting limit 0.227 0.458 10.5 0.104 0.826 1.60 0.100 0.101 0.865 0.0296 0.654 0.329 0.0947

DC98-60-128 Fosters py 44 - 73.4 2.87 0.225 1.91 1.17 1092

DC98-60-128 Fosters py 45 1.43 - 195 2.93 1.49 0.0406 20.6

DC98-60-128 Fosters py 46 4.34 - 0.980 387 1.58 0.273 1.84 0.532 35.7 0.256

DC98-60-128 Fosters py 47 0.330 3.22 - 0.212 58.1 0.208 0.293 1.60 1.69 16.6 0.0986

DC98-60-128 Fosters py 48 4.36 - 0.543 204 0.438 1.09 24.7

DC98-60-128 Fosters py 60 1.37 - 625 2.62 0.122 1.31 10.8 0.450

DC98-60-128 Fosters py 61 4.58 - 1.49 180 3.32 2.32 0.417 0.0881 2.17 79.1 0.198

DC98-60-128 Fosters py 67 0.357 121 - 2.79 478 3.06 0.526 2.37 15.5 2.34 222 0.148

DC98-60-128 Fosters py 68 0.309 50.4 - 1.89 270 1.31 0.467 5.14 1801 0.438

DC98-60-128 Fosters py 70 3.49 - 1077 1.98 1.25 1.32 62.5

DC98-60-128 Fosters py 71 5.53 - 3.00 0.0634 38.5

DC98-60-128 Fosters py 72 0.334 0.958 - 233 0.161 0.181 1.65 121 0.251

DC98-60-128 Fosters py 73 15.4 - 961 6.33 0.467 8.10 172 0.607

97ADb58b WTF sp 39 649 41765 34.6 19.0 0.795 70.8 0.293 22.6

97ADb58b WTF sp 49 1.41 598 41147 0.780 16.7 10.1 0.474 73.5 0.226 3.76 9.72

97ADb58b WTF sp 42 1.24 644 67084 32.0 11.2 14.0 13.3 0.118 45.0 0.0434 13.6

97ADb58b WTF sp 43 8.12 767 58526 2.22 15.8 15.1 0.173 43.0 1.20 18.9 0.803

97ADb58b WTF sp 44 4.13 700 46181 1.12 33.0 12.9 0.106 41.3 78.7 0.477

97ADb58b WTF sp 45 4.14 579 67436 0.626 34.4 14.7 54.3 0.285 1.79 13.5 0.183

97ADb65b AM sp 92 0.281 27.9 31981 0.217 37.9 17.1 0.340 184 0.0287 120 32.7

97ADb65b AM sp 9 0.273 33.7 33987 0.445 18.0 0.112 189 0.0742 99.3 31.4

97ADb65b AM sp 10 2.69 30.5 33610 15.6 0.758 200 0.515 2401 37.0

97ADb65b AM sp 14 0.486 28.9 40360 0.824 16.0 11.1 24.3 177 0.298 1.36 96.1 32.4

97ADb65b AM sp 15 12.9 31442 2.73 34.1 17.4 146 0.0374 811 35.9

AM98-1-201 AM sp 16 0.509 42.2 32952 0.390 18.9 13.3 261 0.124 545 18.9

AM98-1-201 AM sp 40 6.70 38.2 29535 3.19 7.62 198 0.0444 2.56 322 24.2

AM98-1-201 AM sp 49 46.7 32283 0.387 8.59 0.211 206 0.128 1.60 273 16.9

AM98-1-201 AM sp 50 1.30 35.5 31243 0.490 19.8 17.6 203 0.356 89.1 21.0

AM98-1-201 AM sp 51 50.8 46273 0.299 20.1 15.3 156 1.16 5.95 157 21.1

AM98-1-201 AM sp 52 3.77 35.0 42401 4.29 108 41.2 61.4 0.167 170 3.81 3.03 701 23.0

AM98-1-201 AM sp 53 57.5 34.3 43432 46.1 33.8 1.15 701 0.142 1.3 8042 69.4

AM98-1-201 AM sp 54 14.2 58.8 30773 0.475 218 22.3 0.392 677 0.340 2425 16.6

AM98-1-201 AM sp 55 69.4 60936 18.5 138 23.7 34.1 0.372 835 0.513 8217 20.1

AM98-1-201 AM sp 56 29.7 29501 72.1 48.6 0.358 262 1692 15.2

AM98-1-201 AM sp 57 0.924 51.6 29014 2.01 6.42 12.5 314 3.35 640 51.3

38
Table 7 (continued). Trace-element contents of pyrite and sphalerite by laser ablation–inductively coupled–mass spectrometry analysis from the Bonnifield 

district, Alaska.

Sample Deposit or Zone Min. Anal No. V Mn Fe Co As Se Ag Au Hg Tl Ni Cu Ga

Reporting limit 0.227 0.458 10.5 0.104 0.826 1.60 0.100 0.101 0.865 0.0296 0.654 0.329 0.0947

AM98-1-201 AM sp 58 5.23 25.2 30642 0.682 10.2 268 0.0902 163 25.8

DC97-36-190 DC South sp 59 1.20 213 132451 10.8 241 302 24.4 1.37 171 0.298 83.3

DC98-60-128 Fosters sp 62 468 58877 1.27 169 7.54 1.70 196 1.16 16.4 91.3 133

DC98-60-128 Fosters sp 63 223 37788 1.53 94.9 31.4 15.2 0.836 134 7.58 84.6 51.3

DC98-60-128 Fosters sp 64 2.20 244 82350 20.1 6.19 0.843 50.8 0.946 451 15.6

DC98-60-128 Fosters sp 65 293 28460 1.09 44.8 40.5 60.5 0.393 304 9.23

DC98-60-128 Fosters sp 66 351 93867 87.9 4.29 132 0.462 5.03 158 175

39
Table 7 (continued). Trace-element contents of pyrite and sphalerite by laser ablation–inductively coupled–mass spectrometry analysis from the Bonnifield 

district, Alaska.

Sample Deposit or Zone Min. Anal No.

Reporting limit

97ADb58b WTF py 28

97ADb58b WTF py 29

97ADb58b WTF py 30

97ADb58b WTF py 31

97ADb58b WTF py 32

97ADb58b WTF py 46

97ADb58b WTF py 47

97ADb58b WTF py 48

97ADb58b WTF py 50

97ADb58b WTF py 51

97ADb58b WTF py 52

97ADb58b WTF py 53

97ADb58b WTF py 56

97ADb58b WTF py 57

97ADb58b WTF py 58

97ADb65b AM py 65

97ADb65b AM py 66

97ADb65b AM py 67

97ADb65b AM py 68

97ADb65b AM py 69

97ADb65b AM py 70

AM98-1-201 AM py 71

AM98-1-201 AM py 72

AM98-1-201 AM py 73

AM98-1-201 AM py 74

AM98-1-201 AM py 75

AM98-1-201 AM py 76

AM98-1-201 AM py 77

AM98-1-201 AM py 78

AM98-1-201 AM py 79

AM98-1-201 AM py 80

Ge Mo Cd In Sn Te Hg Tl Bi

2.60 0.234 0.563 0.0280 0.559 1.40 0.865 0.0296 0.0285

0.745 0.0582 6.49 0.179

2.78 2.75

121 0.245 0.798 4.30 0.181 0.158

3.09 0.0294 3.62 0.0736

6.46 82.6 0.186 0.806 3.41 4.97 0.110

5.39 0.505 6.95

6.52 1.24 0.780 3.75 0.129

5.09 1.29 5.93 0.213 7.95 0.213

6.22 1.22 0.586 6.45 0.0632 0.0663

8.22 0.810 8.27

4.62 11.3 6.83 0.337 0.0603

3.39 0.663 9.94 12.4 0.224

4.08 1.07 4.93 0.0538 0.273

11.6 0.698 1.24 2.83 0.277 0.467

2.94 2.58 1.83 3.11 0.257 0.133

3.05 6.74 0.853 2.09 153

6.78 183 5.05 20.9 1148 190

2336 0.988 88.9 1.05 781 509

10.9 3.51 0.173 13.2 2.70 556 110

3.77 14.2 1.89 4.39 343 0.0727

3.10 12.7 0.156 30.6 398 79.4

3.35 9.32 13.2 24.9 5355 9.57 6.18 113

3.02 13.9 8.43 0.546 60.4 7.69 11.2 99.7

3.03 2.41 4.30 7.31 17.8 0.400

24.8 0.0526 5.36 6.65 0.748 18.5

11.3 0.612 1.84 35.1 822 2.07

4.82 28.1 29.0 0.400 17.7 14.7 4.01 44.7

12.0 1.09 3.81 45.8 781 12.5

2.96 2.82 2.23 4.27 0.294 0.932

52.9 0.0822 8.61 2.17 1.43 35.9

60.1 0.1847 18.8 1.31 0.939 70.2

40
Table 7 (continued). Trace-element contents of pyrite and sphalerite by laser ablation–inductively coupled–mass spectrometry analysis from the Bonnifield 

district, Alaska.

Sample Deposit or Zone Min. Anal No.

Reporting limit

DC97-36-190 DC South py 81

DC97-36-190 DC South py 82

DC97-36-190 DC South py 83

DC97-36-190 DC South py 84

DC97-36-190 DC South py 85

DC97-36-190 DC South py 86

DC97-36-190 DC South py 87

DC97-36-190 DC South py 89

DC97-36-190 DC South py 90

DC97-36-190 DC South py 91

DC97-36-190 DC South py 6

DC97-36-190 DC South py 7

DC97-36-190 DC South py 8

DC97-36-190 DC South py 11

DC97-36-190 DC South py 12

DC97-36-190 DC South py 13

DC97-36-190 DC South py 17

DC97-36-190 DC South py 18

DC97-36-190 DC South py 19

DC97-36-190 DC South py 20

DC97-36-190 DC South py 21

DC97-36-190 DC South py 22

DC97-36-190 DC South py 23

DC97-36-190 DC South py 24

DC97-36-190 DC South py 25

DC97-36-190 DC South py 26

DC98-60-128 Fosters py 27

DC98-60-128 Fosters py 28

DC98-60-128 Fosters py 29

DC98-60-128 Fosters py 32

DC98-60-128 Fosters py 37

DC98-60-128 Fosters py 38

DC98-60-128 Fosters py 41

DC98-60-128 Fosters py 42

DC98-60-128 Fosters py 43

Ge Mo Cd In Sn Te Hg Tl Bi

2.60 0.234 0.563 0.0280 0.559 1.40 0.865 0.0296 0.0285

0.0670 0.849 2.09

3.78 0.387 3.82 0.271

0.391 1.30 1.05 0.0489 0.0422

4.59 3.51 17.3 20.4 2.70 0.265

1.89 3.54 6.67 4.39 0.0291

3.26 0.709 0.961

0.396 0.0874 0.739 1.40 0.118

3.07 0.293 6.53 7.38 208 2.33 1.34 0.0405 3.00

0.342 1.41 0.674 3.98 2.64 0.153 10.6

9.59 0.757 11.8 74.7 0.0738 32.0

4.71 0.808 1.31 1.43 0.125 0.219

5.34 6.13 0.281 19.0 2.77 4.75

3.60 40.2 0.272 1.64 1.12 0.0418 0.427

6.77 9.80 0.0629 2.79 7.59

3.80 2.88 0.0694 1.06 1.99 0.0762 1.51

7.51 2.40 0.0608 1.39 2.23 0.0329 2.57

5.38 0.0363 2.12 0.180

10.9 0.290 1.10 4.27 0.0557 11.5

11.9 0.351 1.30 3.04 3.51

6.84 0.0306 0.915 0.904 0.0570 0.126

10.4 0.667 1.38 1.43 2.67 0.121 391

5.13 5.44 0.0453 2.44 0.0839 0.120

8.93 0.543 2.24 1.01 0.0521 0.356

12.8 1.99 1.91

7.98 0.0337 1.07 2.38 0.0729 0.0582

7.52 2.18 0.0365 0.0565 0.0839

2.93 0.667 0.941 1.54 0.0509 0.0381

1.30

0.709 0.0591 0.864 1.44 0.0581 0.129

3.73 0.207

2.82 0.464 1.99 1.38 0.0537

6.25 1.98

0.0469 0.489 0.136

2.88 0.480 0.950 0.0748 0.0641

1.41

41
Table 7 (continued). Trace-element contents of pyrite and sphalerite by laser ablation–inductively coupled–mass spectrometry analysis from the Bonnifield 

district, Alaska.

Sample Deposit or Zone Min. Anal No.

Reporting limit

DC98-60-128 Fosters py 44

DC98-60-128 Fosters py 45

DC98-60-128 Fosters py 46

DC98-60-128 Fosters py 47

DC98-60-128 Fosters py 48

DC98-60-128 Fosters py 60

DC98-60-128 Fosters py 61

DC98-60-128 Fosters py 67

DC98-60-128 Fosters py 68

DC98-60-128 Fosters py 70

DC98-60-128 Fosters py 71

DC98-60-128 Fosters py 72

DC98-60-128 Fosters py 73

97ADb58b WTF sp 39

97ADb58b WTF sp 49

97ADb58b WTF sp 42

97ADb58b WTF sp 43

97ADb58b WTF sp 44

97ADb58b WTF sp 45

97ADb65b AM sp 92

97ADb65b AM sp 9

97ADb65b AM sp 10

97ADb65b AM sp 14

97ADb65b AM sp 15

AM98-1-201 AM sp 16

AM98-1-201 AM sp 40

AM98-1-201 AM sp 49

AM98-1-201 AM sp 50

AM98-1-201 AM sp 51

AM98-1-201 AM sp 52

AM98-1-201 AM sp 53

AM98-1-201 AM sp 54

AM98-1-201 AM sp 55

AM98-1-201 AM sp 56

AM98-1-201 AM sp 57

Ge Mo Cd In Sn Te Hg Tl Bi

2.60 0.234 0.563 0.0280 0.559 1.40 0.865 0.0296 0.0285

3.80 11.8 3.24 1.91

1.49 0.0406 0.0462

9.43 1.66 4.47 1.84 0.532 0.0916

1.08 1.60 0.0814

2.55 1.83 0.0666

8.20 0.0725 1.31

2.96 0.107 1.54 0.0881 0.296

68.2 0.132 24.7 2.37 15.5 0.235

41.5 0.229 31.5 5.14 0.198

0.0627

3.97 0.0634 0.0918

4.10 0.698 3.27 0.181

3.34 8.10

2.94 2699 3.40 3.76 70.8 0.293 0.0722

6.95 2931 5.85 5.24 73.5 0.226 0.0504

2.91 1.09 2767 4.68 0.757 45.0 0.043 0.0882

3.78 2739 4.21 1.22 43.0 0.0755

2.71 2727 4.44 2.52 41.3 0.0598

2.70 1.41 2653 3.53 3.54 2.38 54.3 0.285

3.79 0.43 1724 13.9 10.9 10.6 184 0.0287 0.0611

2.33 1744 12.4 16.9 189 0.0742 0.0818

1900 9.28 24.3 9.69 200 0.515 0.498

1.50 1672 11.2 29.7 177 0.298 1.31

27.8 1569 11.0 14.3 146 0.0374 1.05

3.87 1822 102 612 261 0.124 2.54

8.53 1677 25.5 11.5 198 0.0444 3.08

6.85 1818 28.1 8.34 3.45 206 0.128 0.806

6.02 2.68 1762 30.0 13.9 203 0.356 21.3

3.31 1673 27.8 154 156 1.157 20.9

13.3 1708 46.9 4237 170 3.812 159

5.73 2234 240 4023 701 0.142 36.1

2310 160 20.8 5.33 677 0.340 4.39

21.3 1499 199 31.0 835 0.513 11.9

2.76 1947 108 16.3 262 93.7

8.22 1760 92.8 45.7 1.73 314 4.19

42
Table 7 (continued). Trace-element contents of pyrite and sphalerite by laser ablation–inductively coupled–mass spectrometry analysis from the Bonnifield 

district, Alaska.

Sample Deposit or Zone Min. Anal No.

Reporting limit

AM98-1-201 AM sp 58

DC97-36-190 DC South sp 59

DC98-60-128 Fosters sp 62

DC98-60-128 Fosters sp 63

DC98-60-128 Fosters sp 64

DC98-60-128 Fosters sp 65

DC98-60-128 Fosters sp 66

Ge Mo Cd In Sn Te Hg Tl Bi

2.60 0.234 0.563 0.0280 0.559 1.40 0.865 0.0296 0.0285

7.29 7.80 1907 113 12.1 268 0.0902 0.875

10.5 2273 51.8 330 5.22 171 0.298 37.3

6.54 2093 10.2 75.2 8.10 196 1.161 0.179

6.50 1290 12.7 33.0 20.4 134 0.621

1411 7.55 16.4 14.7 50.8 0.946

1440 14.0 39.9 4.73 60.5 0.393

3.59 2275 15.2 70.8 132 0.462 0.0317

43