Alaska Resource Data File, Taku 

River quadrangle, Alaska 

By John C. Barnett1

 and Lance D. Miller1

Open-File Report 03–38 

2003 

This report is preliminary and has not been reviewed for conformity with U.S. Geological 

Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, 

firm, or product names is for descriptive purposes only and does not imply endorsement by the 

U.S. Government. 

U.S. DEPARTMENT OF THE INTERIOR 

U.S. GEOLOGICAL SURVEY

 

1

 Juneau, Alaska 
Alaska Resource Data File 

This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic code. Any use 

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

endorsement by the U.S. Government. 

OPEN-FILE REPORT 03-38 

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Distribution of mineral occurrences in the Taku River

1:250,000-scale quadrangle, Alaska

 This and related reports are accessible through the USGS World Wide Web site 

http://ardf.wr.usgs.gov. Comments or information regarding corrections or missing 

data, or requests for digital retrievals should be directed to: Frederic Wilson, USGS, 4200 

University Dr., Anchorage, AK 99508-4667, e-mail fwilson@usgs.gov, telephone (907) 

786-7448. This compilation is authored by:

 John C. Barnett and Lance D. Miller

 Juneau, AK

 

Taku River quadrangle

 Descriptions of the mineral occurrences shown on the accompanying figure follow. 

See U.S. Geological Survey (1996) for a description of the information content of each field 

in the records. The data presented here are maintained as part of a statewide database 

on mines, prospects and mineral occurrences throughout Alaska.
Alaska Resource Data File 

Page 2 

Site name(s): Unnamed (near Michaels Sword) 

Site type: Prospect 

ARDF no.: TR001 

Latitude: 58.7245 Quadrangle: TR C-6 

Longitude: 133.8765 

Location description and accuracy:

 This prospect is on the west flank of Michaels Sword at an elevation of 5,697 feet. It is 

near the NE corner of section 27, T.36 S., R.69 E. of the Copper River Meridian. The 

prospect was originally described in MAS/MILS record 0021130003. It is also listed as 

Alaska Kardex file number 113-009. This is location T001 of Wells and others (1986). 

The location is accurate within 1/4 mile. 

Commodities: 

 Main: Pb, Zn 

 Other: 

Ore minerals: 

Gangue minerals: 

Geologic description:

 This prospect is in the Coast Range plutonic-metamorphic complex which consists of 

high-grade schist and gneiss intruded by Cretaceous and Tertiary granodiorite. The metamorphic rocks are derived from volcanic, pelitic and minor carbonate strata of unknown 

protolith age (Brew and Ford, 1974, 1984). 

 The rocks at this prospect include granodiorite, quartz monzonite, and alaskite, and pendants of Eocene pyroclastic volcanic rocks, minor sedimentary rocks, and hornfels derived from pelitic and intermediate to mafic volcanic and volcaniclastic rocks (Brew and 

Ford, 1985). 

 Little is known about the prospect; the last reported activity was in 1957 (Wells and 

others, 1986). The commodities suggest it could be a lead-zinc replacement deposit. 

Alteration:

 

Age of mineralization:

 

Deposit model:

Possible polymetallic replacement deposit (Cox and Singer, 1986; model 19a) 

TR001 
Alaska Resource Data File 

Page 3 

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

19a 

Production Status: None 

Site Status: Inactive 

Workings/exploration:

The last reported activity was in 1957 (Wells and others, 1986). 

Production notes:

 

Reserves:

 

Additional comments:

 

References:

U. S. Bureau of Mines, 1973; Brew and Ford, 1974; Brew and Ford, 1984; Brew and 

Ford, 1985; Wells and others, 1986. 

Primary reference: Wells and others, 1986 

Reporter(s): J.C. Barnett and L.D. Miller (Juneau, Alaska) 

Last report date: 11/27/01 

TR001 
Alaska Resource Data File 

Page 4 

Site name(s): Unnamed (head of Boundary Creek) 

Site type: Occurrence 

ARDF no.: TR002 

Latitude: 58.6443 Quadrangle: TR C-6 

Longitude: 133.8515 

Location description and accuracy:

 This occurrence is at the head of Boundary Creek about midway between the Antler 

Peaks and the Bacon Glacier. It is in about the center of the east side of section 21, T.37 

S., R.70 E. of the Copper River Meridian. This is location T002 of Wells and others 

(1986). The map location is the approximate center of several reported occurrences and is 

accurate within 1/4 mile. 

Commodities: 

 Main: Mo 

 Other: Ag, Cu, W 

Ore minerals: Molybdenite, pyrite, pyrrhotite 

Gangue minerals: 

Geologic description:

 This occurrence is in the Coast Range plutonic-metamorphic complex which consists of 

high-grade schist and gneiss intruded by Cretaceous and Tertiary granodiorite. The metamorphic rocks are derived from volcanic, pelitic and minor carbonate strata of unknown 

protolith age (Brew and Ford, 1974, 1984). 

 Molybdenite was first reported in the Boundary Creek area by the U.S. Geological Survey in 1967 (Brew and Ford, 1969). Later investigations were conducted by the U.S. 

Geological Survey in 1985 (Koch and others, 1987) and the U.S. Bureau of Mines in 

1987 (Clough, 1990). The USGS work identified a 100-foot-wide zone of highly altered 

and intensely iron-stained, north to northeast-trending aplite that contains pyrite and molybdenite. The mineralized zone was exposed for a slope distance of 300 feet. The host 

rock is a large dikelike body of aplite and granodiorite at least 2 miles long and 2000 feet 

thick. The country rocks include Mesozoic (?) schistose, biotite hornfels, hornblende 

hornfels, calc-silicate hornfels, and minor marble. The rocks are deformed into north to 

west-trending folds and are cut by Cretaceous (?) tonalite, a large dike of Tertiary aplite, 

and altered granodiorite (Brew and Ford, 1969). Silicification is coincident with the mineralization, and the rocks are iron-stained due to weathering of accessory pyrite and pyrrhotite (Clough,1990). K/Ar dating of hydrothermal muscovite at the geologically similar 

TR002 
Alaska Resource Data File 

Page 5 

Boundary Creek 2 occurrence (TR003), 3 miles to the southeast, indicates that the molybdenite formed at or after 59.7 Ma (Miller and others, 1997). 

 U.S. Geological Survey sampled a 6- by 12-foot area with visible molybdenite (Brew 

and Ford, 1969). A COMPOSITE CHIP SAMPLE OF IRON-STAINED molybdenitebearing ROCK contained 1000 ppm molybdenum, 9.6 ppm silver, and 300 ppm copper; 

another sample contained 1000 ppm molybdenum, 0.9 ppm silver, and 7 ppm copper. 

The U.S. Bureau of Mines sampled more widely (Clough 1990). A 3-foot sample of garnet skarn contains 1000 ppm molybdenum, 45 ppm copper, and 300 ppm zinc; a 2-foot 

sample of syenite contains 33 ppm copper, 57 ppm molybdenum, and 400 ppm tungsten; 

a float sample of siliceous alaskite contains 1.0% molybdenum. 

Alteration:

 Silicification is coincident with the mineralization. Iron staining is due to weathering of 

accessory pyrite and pyrrhotite (Clough,1990). 

Age of mineralization:

 K/Ar dating of hydrothermal muscovite at the geologically similar Boundary Creek 2 

occurrence (TR003), 3 miles to the southeast, indicates that the molybdenite formed at or 

later than 59.7 Ma (Miller and others, 1997). 

Deposit model:

Porphyry Mo (Cox and Singer, 1986; model 21b) 

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

21B 

Production Status: No 

Site Status: Inactive 

Workings/exploration:

There are no surface or underground workings and exploration has been limited. 

Production notes:

 

Reserves:

 

Additional comments:

 

References:

Brew and Ford, 1969; Brew and Ford, 1974; Brew and Ford, 1984; Wells and others, 

1986; Koch and others, 1987; Clough, 1990; Miller and others, 1997. 

Primary reference: Clough, 1990 

Reporter(s): J.C. Barnett and L.D. Miller (Juneau, Alaska) 

TR002 
Alaska Resource Data File 

Page 6 

Last report date: 11/27/01 

TR002 
Alaska Resource Data File 

Page 7 

Site name(s): Boundary Creek 2 

Site type: Occurrence 

ARDF no.: TR003 

Latitude: 58.6206 Quadrangle: TR C-6 

Longitude: 133.7795 

Location description and accuracy:

 This occurrence is on the crest of the ridge between Boundary Creek and Bacon Creek, 

5.5 miles north of the Taku River, and 1.5 miles west of the Canadian border. It is in the 

SE1/4NW1/4 section 36, T.37 S., R.70 E.; the NE1/4 section 2, T.38 S., R.70 E.; and the 

N1/2 section 31, T.37 S., R.71 E. of the Copper River Meridian. The map location is the 

approximate center of several reported occurrences and is accurate within 1/4 mile. 

Commodities: 

 Main: Ag, Mo 

 Other: Au, Cu, Pb, W 

Ore minerals: MOLYBDENITE 

Gangue minerals: 

Geologic description:

 This occurrence is in the Coast Range plutonic-metamorphic complex which consists of 

high-grade schist and gneiss intruded by Cretaceous and Tertiary granodiorite. The metamorphic rocks are derived from volcanic, pelitic, and minor carbonate strata of unknown 

protolith age (Brew and Ford, 1974, 1984). 

 Molybdenite was first reported in the Boundary Creek area (TR002) by the U.S. Geological Survey in 1967 (Brew and Ford, 1969). Investigations were conducted by the U.S. 

Geological Survey in 1985 (Koch and others, 1987) and the U.S. Bureau of Mines in 

1987 (Clough, 1990). 

 This occurrence, which is geologically similar to the one at the head of Boundary Creek 

(TR002) is in Tertiary or younger, iron-stained alkali granite and aplite. It consists of disseminations of fine- to coarse-grained flakes of molybdenite in miarolitic cavities in the 

granite and aplite (Clough, 1990). Pyrite and pyrrhotite accompany the molybdenite. 

Widely spaced, narrow, pyrite-bearing quartz veins cut the granite and aplite, but they do 

not contain molybdenite (Koch and others, 1987). The U.S. Bureau of Mines collected a 

4-foot sample of molybdenite-bearing aplite that contained 4,800 ppm molybdenum, 

1,600 ppm lead, 250 ppm silver, and 0.210 ppm gold (Clough, 1990). Molybdenite occurrences in this area are localized along sets of fractures that strike northeast and eastTR003 
Alaska Resource Data File 

Page 8 

northeast, and dip steeply. The molybdenite forms rosettes that are associated with muscovite on fracture surfaces. The fracture surfaces are also coated with epidote (Miller, 

and others, 1997). There is pervasive silicification throughout the mineralized area. The 

area is intensely iron-stained due to the weathering of pyrite and pyrrhotite (Clough, 

1990). K/Ar dating of hydrothermal muscovite from a biotite-rich, molybdenite-bearing 

granite dike indicates that the molybdenite formed at after 59.7 Ma. (Miller, and others, 

1997). 

Alteration:

 There is pervasive silicification throughout the mineralized area. The rocks are intensely iron-stained due to the weathering of pyrite and pyrrhotite (Clough, 1990). 

Age of mineralization:

 K/Ar dating of hydrothermal muscovite from a biotite-rich, molybdenite-bearing granite 

dike indicates that the molybdenite formed at after 59.7 Ma. (Miller, and others, 1997). 

Deposit model:

Porphyry Mo (Cox and Singer, 1986; model 21b) 

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

21b 

Production Status: No 

Site Status: Inactive 

Workings/exploration:

There are no surface or underground workings and exploration has been limited. 

Production notes:

 

Reserves:

 

Additional comments:

 

References:

Brew and Ford, 1969; Brew and Ford, 1974; Brew and Ford, 1984; Koch and others, 

1987; Clough, 1990; Miller and others, 1997. 

Primary reference: Koch and others, 1987 

Reporter(s): J.C. Barnett and L.D. Miller (Juneau, Alaska) 

Last report date: 11/27/01 

TR003 
Alaska Resource Data File 

Page 9 

Site name(s): West Hill; Chester; Eva; Taku River 

Site type: Prospect 

ARDF no.: TR004 

Latitude: 58.5606 Quadrangle: TR C-6 

Longitude: 133.7057 

Location description and accuracy:

 This prospect is on the southeast flank of Kluchman Mountain near the Taku River. It 

is in the SW1/4SW1/4 section 21, T.38 S., R.71 E. of the Copper River Meridian. The 

prospect was described in MAS/MILS record 0021130014; it is also listed as Alaska 

Kardex file number 112-065. This is location T003 of Wells and others (1986). The location is accurate within 1/4 mile. This is possibly the Taku River prospect described by 

Cobb (1978[OFR 78-698]). 

Commodities: 

 Main: Ag, Au, Cu, Pb, Zn 

 Other: 

Ore minerals: Chalcopyrite, galena, gold, pyrite, pyrrhotite, sphalerite 

Gangue minerals: Quartz 

Geologic description:

 The West Hill prospect is in the Coast Range plutonic-metamorphic complex which 

consists of high-grade schist and gneiss intruded by Cretaceous and Tertiary granodiorite 

(Brew and Ford, 1984). Brew and Ford (1974) indicate that the area consists of tonalitic 

to granitic plutons that intrude and contact metamorphose high-grade, regionally metamorphosed, rocks derived from volcanic, pelitic, and minor carbonate strata of unknown 

protolith age. Roof pendants of the metamorphic rocks are common, as are mafic and 

aplite dikes (Miller and others, 1997). 

 Development consists of a shaft, a 130-foot tunnel, short crosscuts, and trenches. The 

prospect consists of quartz veins that cut schist and slate. The veins are 1 foot to 10 feet 

thick, average about 2 feet thick, and contain sphalerite, pyrrhotite, minor pyrite, galena, 

and chalcopyrite, and small amounts of gold and silver (Wells and others, 1986). 

Alteration:

 

Age of mineralization:

 

TR004 
Alaska Resource Data File 

Page 10 

Deposit model:

Polymetallic vein (Cox and Singer, 1986; model 22c) 

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

22c 

Production Status: Undetermined. 

Site Status: Inactive 

Workings/exploration:

Development consists of a shaft, a 130-foot tunnel, short crosscuts, and trenches (Wells 

and others, 1986). 

Production notes:

 

Reserves:

 

Additional comments:

 

References:

U. S. Bureau of Mines, 1973; Brew and Ford, 1974; Brew and Ford, 1984; Wells and others, 1986; Cobb, 1978 (OF 78-698); Gehrels and Berg, 1992; Miller and others, 1997. 

Primary reference: Wells and others, 1986 

Reporter(s): J.C. Barnett and L.D. Miller (Juneau, Alaska) 

Last report date: 11/27/01 

TR004 
Alaska Resource Data File 

Page 11 

Site name(s): El Paso 

Site type: Prospect 

ARDF no.: TR005 

Latitude: 58.5453 Quadrangle: TR C-6 

Longitude: 133.7002 

Location description and accuracy:

 This prospect is on the south flank of Kluchman Mountain near the Taku River. It is 

near the center of the S1/2 section 28, T.38 S., R.71 E. of the Copper River Meridian. 

The prospect was originally described in MAS/MILS record 0021130008; it is also listed 

as Alaska Kardex file number 113-011. This is location T004 of Wells and others (1986). 

The location is accurate within 1 mile. 

Commodities: 

 Main: Cu, Ni 

 Other: 

Ore minerals: 

Gangue minerals: 

Geologic description:

 The El Paso prospect is in the Coast Range plutonic-metamorphic complex which consists of high-grade schist and gneiss intruded by Cretaceous and Tertiary granodiorite 

(Brew and Ford, 1984). Brew and Ford (1974) indicate that rocks at the prospect are shallow, tonalitic to granitic plutons that intrude and contact metamorphose high-grade, regionally metamorphosed, rocks derived from volcanic, pelitic and minor carbonate strata 

of unknown protolith age. Roof pendants of the metamorphic rocks are common, as are 

mafic and aplite dikes (Miller and others, 1997). 

 Wells, and others, 1986, report this as a Ni-Cu prospect. No other information is available. Claims were active from 1970 to 1976 (Wells and others, 1986). 

Alteration:

 

Age of mineralization:

 

Deposit model:

Possible synorogenic-synvolcanic Ni-Cu (Cox and Singer, 1986; model 7a) 

TR005 
Alaska Resource Data File 

Page 12 

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

7a 

Production Status: None 

Site Status: Undetermined 

Workings/exploration:

Claims were active in 1970-1976 (Wells and others, 1986). 

Production notes:

 

Reserves:

 

Additional comments:

 

References:

U. S. Bureau of Mines, 1973; Brew and Ford, 1974; Brew and Ford, 1984; Wells and others, 1986; Miller and others, 1997. 

Primary reference: Wells and others, 1986 

Reporter(s): J.C. Barnett and L.D. Miller (Juneau, Alaska) 

Last report date: 11/27/01 

TR005 
Alaska Resource Data File 

Page 13 

Site name(s): Mt. Ogden 

Site type: Prospect 

ARDF no.: TR006 

Latitude: 58.4374 Quadrangle: TR B-5 

Longitude: 133.3970 

Location description and accuracy:

 This prospect is on the west flank of Mount Ogden near the international boundary. It 

is just under about the center of the north side of section 5, T.40 S., R.73 E. of the Copper 

River Meridian. This is location T006 of Wells and others (1986). The location is accurate within 1/2 mile. 

Commodities: 

 Main: Cu, Mo 

 Other: Au, Pb, W, Zn 

Ore minerals: Arsenopyrite, galena, gold, molybdenite, scheelite, sphalerite 

Gangue minerals: Fluorite, quartz, rhodochrosite 

Geologic description:

 The Mount Ogden prospect is in a diorite porphyry stock that covers an area about 

4,500 feet by 6,900 feet in size. The stock is marked by sericitic, potassic and chloritic 

alteration. Molybdenite occurs as sparsely disseminated crystals in the porphyry, in miarolitic cavities in the porphyry, along fractures, in quartz breccia bodies, and in quartz 

veins. Minor scheelite, fluorite, rhodochrosite, arsenopyrite, sphalerite, galena and gold 

are present (Wells and others, 1986). Most of this deposit is located on the Canadian side 

of the international boundary, where it is known as the Nan prospect (Miller and others, 

1997). The U.S. Bureau of Mines describe the Mount Ogden prospect as an alaskite intrusive with molybdenite in stockworks, veins, and along fractures (Clough, 1990). Investigations on the Canadian portion of the deposit describe molybdenite clots and fracture coatings that are restricted to aplite dikes and hydrothermally altered felsite (Miller 

and others, 1997). U-Pb dates from a quartz monzonite porphyry on Mt. Eriksen in British Columbia give an age of 53.5 Ma. A K/Ar date on a biotite-rich, molybdenite-bearing 

granite dike at the nearby Boundary Creek 2, molybdenum occurrence (TR003) is 59.7 

Ma (Miller and others, 1997). 

Alteration:

 Sericitic, potassic, and chloritic alteration is present (Wells and others, 1986). 

TR006 
Alaska Resource Data File 

Page 14 

Age of mineralization:

 U-Pb dates from a quartz monzonite porphyry on Mt. Eriksen in British Columbia give 

an age of 53.5 Ma. A K/Ar date on a biotite-rich, molybdenite-bearing granite dike at the 

nearby Boundary Creek 2, molybdenum occurrence (TR003) is 59.7 Ma (Miller and others, 1997). 

Deposit model:

Porphyry Mo (Cox and Singer, 1986; model 21b) 

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

21b 

Production Status: No 

Site Status: Inactive 

Workings/exploration:

 

Production notes:

 

Reserves:

 

Additional comments:

 

References:

Wells and others, 1986; Clough, 1990; Miller and others, 1997. 

Primary reference: Wells and others, 1986 

Reporter(s): J.C. Barnett and L.D. Miller (Juneau, Alaska) 

Last report date: 11/27/01 

TR006 
Alaska Resource Data File 

Page 15 

Site name(s): Unnamed (near head of Yehring Creek) 

Site type: Occurrence 

ARDF no.: TR007 

Latitude: 58.4003 Quadrangle: TR B-6 

Longitude: 133.8273 

Location description and accuracy:

 This occurrence is near the crest of the ridge between the north fork of Davidson Creek 

and the head of Yehring Creek. It is in SE1/4 section 15, T.40 S., R.70 E. of the Copper 

River Meridian. The map location is the approximate center of several reported occurrences and is accurate within 1/4 mile. 

Commodities: 

 Main: Mo 

 Other: Ag, Au, Cu 

Ore minerals: Chalcopyrite, molybdenite, pyrite, pyrrhotite 

Gangue minerals: Quartz 

Geologic description:

 This occurrence is in the Coast Range plutonic-metamorphic complex which consists of 

high-grade schist and gneiss intruded by Cretaceous and Tertiary granodiorite (Brew and 

Ford, 1974, 1984). The rocks at this occurrence consist of Tertiary granite to granodiorite. The occurrence consists of molybdenite, chalcopyrite, pyrite, and pyrrhotite in a 

granular iron-stained quartz monzonite. The molybdenite occurs as large flakes concentrated along the contact between the quartz monzonite and granodiorite. The molybdenite 

is erratically distributed and appears to be confined to areas marked by iron-staining 

(Clough, 1990). The U.S. Bureau of Mines has reported values up to 0.606% copper and 

more than 2.0% molybdenum in selected float samples (Clough, 1990). K/Ar dating of 

hydrothermal muscovite at the near by, geologically similar Boundary Creek 2 (TR003) 

occurrence indicates that the molybdenite formed at or after 59.7 Ma (Miller and others, 

1997). 

Alteration:

 Locally conspicuous iron staining. 

Age of mineralization:

 K/Ar dating of hydrothermal muscovite at the near by, geologically similar Boundary 

TR007 
Alaska Resource Data File 

Page 16 

Creek 2 (TR003) occurrence indicates that the molybdenite formed at or after 59.7 Ma 

(Miller and others, 1997). 

Deposit model:

Porphyry Mo (Cox and Singer, 1986; model 21b) 

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

21b 

Production Status: None 

Site Status: Inactive 

Workings/exploration:

This occurrence was discovered by the U.S. Bureau of Mines in 1985 (Clough, 1990) 

There are no surface or underground workings and exploration has been limited. 

Production notes:

 

Reserves:

 

Additional comments:

 

References:

Brew and Ford, 1974; Brew and Ford, 1984; Clough, 1990; Miller and others, 1997. 

Primary reference: Clough, 1990 

Reporter(s): J.C. Barnett and L.D. Miller (Juneau, Alaska) 

Last report date: 11/27/01 

TR007 
Alaska Resource Data File 

Page 17 

Site name(s): Unnamed (west of upper Hidden Creek) 

Site type: Occurrence 

ARDF no.: TR008 

Latitude: 58.4002 Quadrangle: TR B-6 

Longitude: 133.7474 

Location description and accuracy:

 This occurrence is along the west side of upper Hidden Creek valley. It is just east of 

the center of section 18, T.40 S., R.71 E. of the Copper River Meridian. The map location is the approximate center of several reported occurrences and is accurate within 1/4 

mile. 

Commodities: 

 Main: Mo 

 Other: Au 

Ore minerals: Molybdenite 

Gangue minerals: 

Geologic description:

 This occurrence is in the Coast Range plutonic-metamorphic complex which consists 

of high-grade schist and gneiss intruded by Cretaceous and Tertiary granodiorite (Brew 

and Ford, 1974, 1984). In 1985, the U.S. Bureau of Mines found granite float in the area 

that contained sparse molybdenite. Their sampling indicated anomalous values of molybdenum, barium, copper and gold. Limited reconnaissance failed to locate the bedrock 

source of the molybdenite-bearing float (Clough, 1990). Recent studies of other molybdenite occurrences in this area (TR002, TR003, TR006, TR007) suggest that molybdenite 

mineralization is associated with Paleocene-Eocene (63-50 Ma) magmatism (Miller and 

others, 1997). 

Alteration:

 

Age of mineralization:

 Recent studies of other molybdenite occurrences in this area (TR002, TR003, TR006, 

TR007) suggest that molybdenite mineralization is associated with Paleocene-Eocene 

(63-50 Ma) magmatism (Miller and others, 1997). 

Deposit model:

TR008 
Alaska Resource Data File 

Page 18 

Porphyry Mo (Cox and Singer, 1986; model 21b) 

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

21b 

Production Status: None 

Site Status: Inactive 

Workings/exploration:

There are no surface or underground workings and exploration has been limited. 

Production notes:

 

Reserves:

 

Additional comments:

 

References:

Brew and Ford, 1974; Brew and Ford, 1984; Clough, 1990; Miller and others, 1997. 

Primary reference: Clough, 1990 

Reporter(s): J.C. Barnett and L.D. Miller (Juneau, Alaska) 

Last report date: 11/27/01 

TR008 
Alaska Resource Data File 

Page 19 

Site name(s): Unnamed (on Mt. Brundage) 

Site type: Occurrence 

ARDF no.: TR009 

Latitude: 58.2713 Quadrangle: TR B-5 

Longitude: 133.3457 

Location description and accuracy:

 This occurrence is on the south flank of Mt. Brundage near the international boundary. 

It is near the center of the W1/2 section 32, T.41 S., R.74 E. of the Copper River Meridian. This is location T007 of Wells and others (1986). The location is accurate within 1/4 

mile. 

Commodities: 

 Main: Cu 

 Other: 

Ore minerals: Chalcopyrite, pyrrhotite 

Gangue minerals: 

Geologic description:

 This occurrence is in the Coast Range plutonic-metamorphic complex which consists 

of high-grade schist and gneiss intruded by Cretaceous and Tertiary granodiorite (Brew 

and Ford, 1984). Brew and Ford (1985) describe the area as consisting predominately of 

sphene-bearing, biotite-hornblende granodiorite associated with a pendant of marble and 

calc-silicate granofels on the southwest flank of Mt. Brundage. Wells and others (1986), 

report traces of chalcopyrite and pyrrhotite in iron-stained siliceous gneiss here. Samples 

of this gneiss collected by the U.S. Geological Survey contain minor pyrrhotite and traces 

of chalcopyrite, but no significant metal values (Cobb, 1978 [OFR 78-698]). 

Alteration:

 Local iron staining. 

Age of mineralization:

 

Deposit model:

 

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

 

TR009 
Alaska Resource Data File 

Page 20 

Production Status: No 

Site Status: Inactive 

Workings/exploration:

 

Production notes:

 

Reserves:

 

Additional comments:

 

References:

Cobb, 1978 (OF 78-698); Brew and Ford, 1984; Brew and others, 1984; Brew and Ford, 

1985; Wells and others, 1986. 

Primary reference: Cobb, 1978 (OFR 78-698) 

Reporter(s): J.C. Barnett and L.D. Miller (Juneau, Alaska) 

Last report date: 11/27/01 

TR009 
Alaska Resource Data File 

Page 21 

Site name(s): Unnamed (near Crescent Lake) 

Site type: Prospect 

ARDF no.: TR010 

Latitude: 58.2310 Quadrangle: TR A-5 

Longitude: 133.4681 

Location description and accuracy:

 This prospect is 2.5 miles west-northwest of Crescent Lake at an elevation of 4,500 feet. 

It is in about the center of the W1/2 section 15, T.42 S., R.73 E. of the Copper River Meridian. This is location T008 of Wells and others (1986). The location is accurate within 

1/4 mile. 

Commodities: 

 Main: Cu 

 Other: 

Ore minerals: 

Gangue minerals: 

Geologic description:

 The Crescent Lake prospect is in the Coast Range plutonic-metamorphic complex 

which consists of high-grade schist and gneiss intruded by Cretaceous and Tertiary granodiorite (Brew and Ford, 1984). Brew and Ford (1985) describe the rocks in the vicinity of 

the prospect to be underlain predominately by sphene-bearing biotite-hornblende granodiorite. Wells and others report that this may be a copper prospect and that 6 lode claims 

were active in 1956 (Wells and others, 1986; Kimball and others, 1984). No other information is available. 

Alteration:

 

Age of mineralization:

 

Deposit model:

 

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

 

Production Status: None 

TR010 
Alaska Resource Data File 

Page 22 

Site Status: Inactive 

Workings/exploration:

Six lode claims were active in 1956. 

Production notes:

 

Reserves:

 

Additional comments:

 

References:

Brew and Ford, 1984; Kimball and others, 1984; Brew and Ford, 1985; Wells and others, 

1986. 

Primary reference: Wells and others, 1986 

Reporter(s): J.C. Barnett and L.D. Miller (Juneau, Alaska) 

Last report date: 11/27/01 

TR010 
Alaska Resource Data File 

Page 23 

Site name(s): Red Mountain 

Site type: Prospect 

ARDF no.: TR011 

Latitude: 58.2257 Quadrangle: TR A-5 

Longitude: 133.5178 

Location description and accuracy:

 This prospect is midway between Crescent Lake and the Speel River at an elevation of 

1900 feet. It is about 0.1 mile southwest of the center of section 17, T.42 S., R.73 E. of 

the Copper River Meridian. The prospect was originally described in MAS/MILS record 

0021130006. It is also listed as Alaska Kardex file number 113-003. The location is accurate within 1/2 mile. 

Commodities: 

 Main: Ag, Cu, Pb, Zn 

 Other: 

Ore minerals: 

Gangue minerals: 

Geologic description:

 This prospect is in the Coast Range plutonic-metamorphic complex which consists of 

high-grade schist and gneiss intruded by Cretaceous and Tertiary granodiorite (Brew and 

Ford, 1984). Brew and Ford (1985) describe the rocks at this prospect as predominately 

migmatite gneiss and sphene-bearing biotite-hornblende granodiorite. The MAS/MILS 

record reports 6 lode claims, Red Mountain 1 through 6. No other information is available. 

Alteration:

 

Age of mineralization:

 

Deposit model:

 

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

 

Production Status: None 

TR011 
Alaska Resource Data File 

Page 24 

Site Status: Inactive 

Workings/exploration:

The MAS/MILS record reports 6 lode claims, Red Mountain 1 through 6. No other information is available. 

Production notes:

 

Reserves:

 

Additional comments:

 

References:

U. S. Bureau of Mines, 1973; Brew and Ford, 1984; Brew and Ford, 1985. 

Primary reference: This record 

Reporter(s): J.C. Barnett and L.D. Miller (Juneau, Alaska) 

Last report date: 11/27/01 

TR011 
Alaska Resource Data File 

Page 25 

Site name(s): Unnamed (northeast of Indian Lake) 

Site type: Prospect 

ARDF no.: TR012 

Latitude: 58.1970 Quadrangle: TR A-5 

Longitude: 133.6211 

Location description and accuracy:

 This prospect is at an elevation of 600 feet, about 1 mile east of Indian Lake, near the 

center of section 27, T.42 S., R.72 E. of the Copper River Meridian. The prospect is described in MAS/MILS record 0021130005. The location is accurate within 1/2 mile. 

Commodities: 

 Main: Au 

 Other: 

Ore minerals: 

Gangue minerals: 

Geologic description:

 This prospect is in the Coast Range plutonic-metamorphic complex (Brew and Ford, 

1984), which consists of high-grade schist and gneiss intruded by Cretaceous and Tertiary 

granodiorite. Brew and Ford (1985) show the rocks near this placer area as predominately 

sphene-bearing biotite-hornblende granodiorite. The MAS/MILS record reports this occurrence as a lode gold claim. No other information is available. 

Alteration:

 

Age of mineralization:

 

Deposit model:

 

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

 

Production Status: Undetermined. 

Site Status: Inactive 

Workings/exploration:

TR012 
Alaska Resource Data File 

Page 26 

 

Production notes:

 

Reserves:

 

Additional comments:

 

References:

Brew and Ford, 1984; Brew and Ford, 1985. 

Primary reference: This record 

Reporter(s): J.C. Barnett and L.D. Miller (Juneau, Alaska) 

Last report date: 11/27/01 

TR012 
Alaska Resource Data File 

Page 27 

Site name(s): Bach; Beach Group 

Site type: Prospect 

ARDF no.: TR013 

Latitude: 58.0916 Quadrangle: TR A-6 

Longitude: 133.7844 

Location description and accuracy:

 This prospect is at an elevation of 3,000 feet near the southeast end of a ridge west of 

outer Speel Arm. It is about 0.5 mile north of the center of section 3, T. 44 S., R. 71 E. of 

the Copper River Meridian. The location is accurate within 1/2 mile. 

Commodities: 

 Main: Au 

 Other: 

Ore minerals: Arsenopyrite (?) 

Gangue minerals: Quartz 

Geologic description:

 The Bach or Beach Group prospect is in the Coast Range plutonic-metamorphic complex which consists of high-grade schist and gneiss intruded by Cretaceous and Tertiary 

granodiorite (Brew and Ford, 1984). Brew and Ford (1985) describe the rocks at this 

prospect as mainly by tonalite, quartz diorite, and minor granodiorite. The deposit consists of a quartz vein that contains an auriferous sulfide (arsenopyrite?), in diorite (Wright 

and Wright, 1906). This prospect was active prior to 1905 but reconnaissance work by the 

U.S. Bureau of Mines in the 1980's failed to locate it (Redman and others, 1985). 

Alteration:

 

Age of mineralization:

 

Deposit model:

Possibly low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a) 

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

36a 

Production Status: Undetermined 

TR013 
Alaska Resource Data File 

Page 28 

Site Status: Inactive 

Workings/exploration:

 

Production notes:

 

Reserves:

 

Additional comments:

 

References:

Wright and Wright, 1906; Brew and Ford, 1984; Brew and Ford, 1985; Redman and others, 1985. 

Primary reference: Redman and others, 1985 

Reporter(s): J.C. Barnett and L.D. Miller (Juneau, Alaska) 

Last report date: 11/27/01 

TR013 
Alaska Resource Data File 

Page 29 

Site name(s): Taku Chief; Steeple 

Site type: Prospect 

ARDF no.: TR014 

Latitude: 58.0841 Quadrangle: TR A-6 

Longitude: 133.9813 

Location description and accuracy:

 This prospect is about 0.5 mile east of Steeple Peak at an elevation of about 2,100 feet. 

It is in the SW1/4NW 1/4 section 4, T. 44 S., R. 70 E. of the Copper River Meridian. 

This is location T009 of Wells and others (1986). The location is accurate within 1/4 

mile. 

Commodities: 

 Main: Au, Zn 

 Other: 

Ore minerals: Pyrite, pyrrhotite 

Gangue minerals: 

Geologic description:

 The Taku Chief prospect is in black phyllite, felsic phyllite, and chlorite phyllite that 

have been intruded by Cretaceous diorite and metagabbro (Redman and others, 1989). 

The phyllite locally contains both disseminated and stratiform pyrrhotite and pyrite. Zinc 

and gold values have been reported (Redman and others, 1985). A few open cuts, 

trenches, and an adit have been excavated (Redman and others, 1989). The Taku Chief 

claims were originally staked in 1954 by Henry (Tiger) Olson (Redman and others, 1985). 

Alteration:

 

Age of mineralization:

 

Deposit model:

Possibly low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a) 

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

36a 

Production Status: None 

TR014 
Alaska Resource Data File 

Page 30 

Site Status: Inactive 

Workings/exploration:

The Taku Chief claims were originally staked in 1954 by Henry (Tiger) Olson (Redman 

and others, 1985). Open cuts, trenches and an adit have been excavated (Redman and 

others, 1989). 

Production notes:

 

Reserves:

 

Additional comments:

 

References:

Redman and others, 1985; Wells and others, 1986; Redman and others, 1989. 

Primary reference: Redman and others, 1989 

Reporter(s): J.C. Barnett and L.D. Miller (Juneau, Alaska) 

Last report date: 11/27/01 

TR014 
Alaska Resource Data File 

Page 31 

Site name(s): Sunrise 

Site type: Prospect 

ARDF no.: TR015 

Latitude: 58.0748 Quadrangle: TR A-6 

Longitude: 133.9308 

Location description and accuracy:

 The Sunrise manganese prospect is at an elevation of about 3,000 feet, about 2.3 miles 

northeast of Arthur Peak. It is near the northwest corner of section 11, T. 44 S., R. 70 E. 

of the Copper River Meridian. This is location T012 of Wells and others (1986). The 

location is accurate within 1/4 mile. 

Commodities: 

 Main: Mn 

 Other: 

Ore minerals: Manganite, psilomelane, pyrolusite, rhodochrosite, rhodonite 

Gangue minerals: Quartz 

Geologic description:

 The Sunrise manganese prospect consists of several outcrops of short manganesebearing veins that are 1.0 to 3.5 feet wide, composed of about 70% rhodochrosite, 15% 

manganese dioxide (pyrolusite and/or manganite), 10% quartz, 5% rhodonite, and possibly some psilomelane (Wells and others, 1986). Several other parallel manganese-bearing 

veins 0.1 to 1.0 ft wide have been identified over a strike length of 6000 feet. The manganese-bearing veins are in a 200- to 300-foot section of phyllite that is overlain by schistose basalt and tuff. The veins are conformable to the phyllite which strikes N 50 W and 

dips 45-80 NE (Pittman, 1957). Pittman (1957) describes jasperoid at this prospect that 

may represent local silicification. 

 A channel sample 3.5 feet long contain 22.4% manganese; another over 1 foot long contain 31.6% manganese (Pittman, 1957). Roehm (1943) reported that assays of several 

samples of low-grade and high-grade veins vary from 10.76% to 38.45% manganese. A 

beneficiation test in 1957 by the U.S. Bureau of Mines produced a 40.6% manganese concentrate (Pittman, 1957). The beneficiation test failed to produce a marketable concentrate (Cobb, 1978 [OFR 78-698]). Development consists of a few shallow pits and 

trenches. The prospect was discovered by Henry 'Tiger' Olson in 1935 (Redman and others, 1985). There were active claims on the property from 1935 to 1979 (Wells and others, 1986). 

TR015 
Alaska Resource Data File 

Page 32 

Alteration:

 Jasperoid may represent local silicification (Pittman, 1957). 

Age of mineralization:

 

Deposit model:

Possible volcanogenic Mn (Cox and Singer, 1986; model 24c) 

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

24c 

Production Status: No 

Site Status: Inactive 

Workings/exploration:

 Development consists a few shallow pits and trenches. The prospect was discovered by 

Henry 'Tiger' Olson in 1935 (Redman and others, 1985). There were active claims on the 

property from 1935 to 1979 (Wells and others, 1985). 

Production notes:

 

Reserves:

 

Additional comments:

 

References:

Roehm, 1943; Pittman, 1957; Cobb, 1978 (OFR 78-698); Redman and others, 1985; 

Wells and others, 1986. 

Primary reference: PITTMAN, 1957 

Reporter(s): J.C. Barnett and L.D. Miller (Juneau, Alaska) 

Last report date: 11/27/01 

TR015 
Alaska Resource Data File 

Page 33 

Site name(s): AEK 

Site type: Prospect 

ARDF no.: TR016 

Latitude: 58.0672 Quadrangle: TR A-6 

Longitude: 133.893 

Location description and accuracy:

 The AEK prospect is located near the divide between Limestone Creek and Prospect 

Creek at an elevation of about 2,000 feet. It is in the NW1/4SE1/4 section 12, T. 44 S., 

R. 70 E. of the Copper River Meridian. This is location T010 of Wells and others 

(1986). The location is accurate within 1/4 mile. 

Commodities: 

 Main: Ag 

 Other: Ba 

Ore minerals: 

Gangue minerals: 

Geologic description:

 The AEK prospect consists of iron-stained slate that contains thin quartz veins. Assays 

indicate barium and traces of silver (Redman and others, 1985). This prospect has been an 

active exploration target since 1880 (Wells and others, 1986). In 1980, over 200 claims 

covered the ridge near the divide between Prospect and Limestone Creeks. They were 

staked in a long narrow belt that parallels the NW-trending geologic structure of the area. 

Alteration:

 

Age of mineralization:

 

Deposit model:

Possibly low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a) 

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

36a 

Production Status: None 

TR016 
Alaska Resource Data File 

Page 34 

Site Status: Inactive 

Workings/exploration:

 This prospect has been an active exploration target since 1880 (Wells and others, 1986). 

In 1980, over 200 claims covered the ridge divide between Prospect and Limestone 

Creeks. They were staked in a long narrow belt that parallels the geologic structure of the 

area. 

Production notes:

 

Reserves:

 

Additional comments:

 

References:

Redman and others, 1985; Wells and others, 1986; Redman and others, 1989. 

Primary reference: Redman and others, 1985 

Reporter(s): J.C. Barnett and L.D. Miller (Juneau, Alaska) 

Last report date: 11/27/01 

TR016 
Alaska Resource Data File 

Page 35 

Site name(s): Unnamed (upper Prospect Creek) 

Site type: Prospect 

ARDF no.: TR017 

Latitude: 58.0867 Quadrangle: TR A-6 

Longitude: 133.8735 

Location description and accuracy:

 The prospect is at an elevation of about 300 feet on the northeast side of upper Prospect 

Creek. It is in about the center of the NW1/4 section 6, T. 44 S., R. 71 E. of the Copper 

River Meridian. This is location T011 of Wells and others (1986). The location is accurate within 1/2 mile. 

Commodities: 

 Main: Cu 

 Other: Ag, Be, Mo 

Ore minerals: Pyrite 

Gangue minerals: Quartz 

Geologic description:

 This prospect consists of iron-stained slate that contains sparse 0.3- to 2.5-inch-thick 

quartz veins and euhedral pyrite disseminated in fractures. A 6.5-foot chip sample collected in 1983 contains 0.5% copper and traces of beryllium and silver (Wells and others, 

1986). 

Alteration:

 

Age of mineralization:

 

Deposit model:

 

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

 

Production Status: None 

Site Status: Inactive 

Workings/exploration:

TR017 
Alaska Resource Data File 

Page 36 

 

Production notes:

 

Reserves:

 

Additional comments:

 

References:

Wells and others, 1986. 

Primary reference: Wells and others, 1986 

Reporter(s): J.C. Barnett and L.D. Miller (Juneau, Alaska) 

Last report date: 11/27/01 

TR017 
Alaska Resource Data File 

Page 37 

Site name(s): Whiting River; Lost Charlie Ross 

Site type: Prospect 

ARDF no.: TR018 

Latitude: 58.0499 Quadrangle: TR A-5 

Longitude: 133.4430 

Location description and accuracy:

 This prospect, marked by a symbol on the topographic map, is about 2 miles east of the 

Whiting River at an elevation of about 3,000 feet. It is near the southeast corner of section 15, T. 44 S., R. 73 E. of the Copper River Meridian. This is location T019 of Wells 

and others (1986). The location is accurate. 

Commodities: 

 Main: Ag, Au, Pb 

 Other: Cu, Zn 

Ore minerals: Argentiferous (?) galena, auriferous (?) arsenopyrite, chalcopyrite, pyrite, 

sphalerite 

Gangue minerals: Quartz 

Geologic description:

 This prospect is in the Coast Range plutonic-metamorphic complex which consists of 

high-grade schist and gneiss intruded by Cretaceous and Tertiary granodiorite. The metamorphic rocks are derived from volcanic, pelitic, and minor carbonate strata of unknown 

protolith age (Brew and Ford, 1974, 1984). Brew and Ford (1985) show the prospect in 

sphene-bearing biotite-hornblende granodiorite associated with a large pendant of marble 

and calc-silicate granofels immediately to the east. 

 The Whiting River prospect, also referred to as the Lost Charlie Ross, consists of several quartz veins in a dolomite roof pendant within diorite (Cobb, 1978 [OFR 78-698]). 

The dolomite is probably part of an assemblage of Paleozoic metamorphic rocks that outcrop discontinuously to the south of the Whiting River (Clough, 1990). Knopf (1910) describes the deposit as a quartz vein 4.5 feet wide and 100 feet long that contains arsenopyrite, pyrite, sphalerite, galena, and chalcopyrite. A sample of 'a streak of solid mineral 

11 inches wide' on the footwall assayed more than 1 ounce of gold per ton, 50 ounces of 

silver per ton, and 40% lead. The dominant sulfide is arsenopyrite. Buddington (1929) 

describes an open cut along the vein and a 118-foot crosscut that did not reach the vein; 

also that the prospect has been known since 1898. 

TR018 
Alaska Resource Data File 

Page 38 

Alteration:

 

Age of mineralization:

 

Deposit model:

Polymetallic replacement deposit (Cox and Singer, 1986; Model 19a) 

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

19a 

Production Status: No 

Site Status: Inactive 

Workings/exploration:

 Buddington (1929) describes an open cut along the vein and a 118-foot crosscut that did 

not reach the vein; also that the prospect has been known since 1898. 

Production notes:

 

Reserves:

 

Additional comments:

 

References:

Knopf, 1910; Buddington, 1925; Brew and Ford, 1974; Cobb, 1978 (OFR 78-698); Brew 

and Ford, 1984; Brew and Ford, 1985; Wells and others, 1986; Clough, 1990. 

Primary reference: Cobb, 1978 (OFR 78-698) 

Reporter(s): J.C. Barnett and L.D. Miller (Juneau, Alaska) 

Last report date: 11/27/01 

TR018 
Alaska Resource Data File 

Page 39 

Site name(s): JLC 

Site type: Prospect 

ARDF no.: TR019 

Latitude: 58.0659 Quadrangle: TR A-6 

Longitude: 133.7302 

Location description and accuracy:

 The JLC placer prospect is on an unnamed creek that enters Speel Arm, 0.85 mile 

northeast Bogert Point . The prospect is about in the center of the south half of section 

12, T. 44 S., R. 71 E. of the Copper River Meridian. The location is accurate within 1/4 

mile. 

Commodities: 

 Main: Au 

 Other: 

Ore minerals: 

Gangue minerals: 

Geologic description:

 The regional geology of the area consists of pelitic schist, calc-silicate schist, marble, 

and quartzite (Brew and Ford,1985). Gehrels and Berg (1992) show a small pluton of 

Cretaceous granodiorite west of the prospect. Redman and others (1989) describe the 

host rocks at the prospect as foliated diorite. Claims were reported active from 1880 

through 1980 (Wells and others, 1986). The location given by Wells and others (1986) 

appears to be incorrect and conflicts with all other reported locations. The Wells report 

may have mistaken the Bogert Point placer (TR020), for the JLC prospect. No other information is available. 

Alteration:

 

Age of mineralization:

 Quaternary. 

Deposit model:

Placer gold (Cox and Singer, 1986; model 39a) 

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

TR019 
Alaska Resource Data File 

Page 40 

39a 

Production Status: Undetermined. 

Site Status: Inactive 

Workings/exploration:

 Claims were reported active from 1880 through 1980 (Wells and others, 1986). 

Production notes:

 

Reserves:

 

Additional comments:

 

References:

Brew and Ford, 1985; Wells and others, 1986; Redman and others, 1989; Gehrels and 

Berg, 1992. 

Primary reference: Redman and others, 1985 

Reporter(s): J.C. Barnett and L.D. Miller (Juneau, Alaska) 

Last report date: 11/27/01 

TR019 
Alaska Resource Data File 

Page 41 

Site name(s): Bogert Point; Lady Dee 

Site type: Prospect 

ARDF no.: TR020 

Latitude: 58.0606 Quadrangle: TR A-6 

Longitude: 133.7636 

Location description and accuracy:

 This prospect is on a short creek that enters Port Snettisham about 0.7 mile, southsoutheast of Bogert Point and 1/2 mile east of Speel Arm in Port Snettisham. The prospect is on the creek at an elevation of about 200 feet, in the NE1/4NW1/4 section 14, T. 

44 S., R. 71 E. of the Copper River Meridian. The location is accurate within 1/4 mile. 

Commodities: 

 Main: Au 

 Other: 

Ore minerals: 

Gangue minerals: 

Geologic description:

 The regional geology of the area consists of pelitic schist, calc-silicate schist, marble, 

and quartzite (Brew and Ford,1985). Gehrels and Berg (1992) show a small pluton of 

Cretaceous granodiorite west of the prospect. Redman and others (1989) describe the 

rocks beneath the placer as black phyllite and mafic metavolcanic rocks. Very small 

amounts of fine gold have been panned from the creek (Redman and others, 1989). The 

location given by Wells and others (1986) appears to be incorrect (see TR019). 

Alteration:

 

Age of mineralization:

 Quaternary. 

Deposit model:

Placer gold (Cox and Singer, 1986; model 39a) 

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

39a 

TR020 
Alaska Resource Data File 

Page 42 

Production Status: Undetermined. 

Site Status: Inactive 

Workings/exploration:

 

Production notes:

 

Reserves:

 

Additional comments:

 

References:

Brew and Ford, 1985; Wells and others, 1986; Redman and others, 1989; Gehrels and 

Berg, 1992. 

Primary reference: Redman and others, 1989 

Reporter(s): J.C. Barnett and L.D. Miller (Juneau, Alaska) 

Last report date: 11/27/01 

TR020 
Alaska Resource Data File 

Page 43 

Site name(s): Enterprise; Arizona 

Site type: Mine 

ARDF no.: TR021 

Latitude: 58.0450 Quadrangle: TR A-6 

Longitude: 133.9678 

Location description and accuracy:

 This mine is indicated by a mine symbol on the Taku River A-6 topographic map. It is 

on the north side of Limestone Inlet at an elevation of 1,600 feet, in the NE1/4NE1/4 section 21, T. 44 S., R. 70 E. of the Copper River Meridian. 

Commodities: 

 Main: Au 

 Other: Cu, Pb, Zn 

Ore minerals: Chalcopyrite, galena, gold, pyrite, sphalerite 

Gangue minerals: Quartz 

Geologic description:

 The deposit at the Enterprise Mine consists of two parallel, sheeted quartz veins, 3 

inches to 9 feet thick and several hundred feet long, that strike N 25 E and dip 45 NW. 

The veins contain free gold and small amounts of galena, sphalerite, pyrite, and chalcopyrite. Wells and others (1986) describe the host rocks as slate and greenstone intruded by 

Cretaceous porphyritic diorite. Redman and others (1989) describe the Enterprise vein as 

cutting porphyritic biotite-hornblende granite. According to Roehm (1936), at least one 

of the veins is well-defined and shows evidence of some normal-fault movement parallel 

to the vein. Roehm reports that gold values decrease with depth. Samples from the lower 

adit assayed 0.01 to 0.22 ounce of gold per ton, and samples from a raise in the adit assayed 0.06 to 0.48 ounce of gold per ton. Samples from the upper adit assayed 0.12 to 

0.98 ounce of gold per ton and samples from an open cut above the adit assayed 1.34 

ounces of gold per ton (Roehm, 1936). U.S. Bureau of Mines samples collected in 1988 

contain similar amounts of gold (Redman and others, 1989). Redman and others (1989) 

describe carbonate alteration that is restricted to within an inch or two of the margins of 

the veins. 

 The deposit was probably discovered about 1905 (Redman and others, 1985), and there 

was some surface activity prior to 1911 (Knopf, 1911). Currently (2001), there are 800 

feet of surface trenches and at least two adits, including a 120-foot-long upper adit and a 

320-foot-long lower adit. In 1934, a 52-foot inclined raise was driven by H. Jackson and 

TR021 
Alaska Resource Data File 

Page 44 

A. Westhall. A stamp mill on the property had five,1250-pound stamps (Roehm, 1936). 

By 1914, 200 tons of ore had been processed in a Johnson rod mill; at least 15 ounces of 

gold and a small amount of silver were recovered. Later in 1914, B.L. Thane took over 

the property and recovered 85 ounces of gold from 300 tons of ore that was processed in a 

5-stamp mill (Roehm, 1936). The Enterprise mine has an inferred resource of 24,600 

short tons of ore with an average of 0.23 ounce of gold per ton (Redman and others, 

1989). 

Alteration:

 Carbonate alteration is restricted to within an inch or two of the margins of the veins 

(Redman and others, 1989). 

Age of mineralization:

 The veins apparently formed between 56 Ma and 53 Ma (Miller and others, 1994). 

Deposit model:

Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a) 

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

36a 

Production Status: Yes; small 

Site Status: Inactive 

Workings/exploration:

 The deposit was probably discovered about 1905 and there was some surface activity 

prior to 1911 (Knopf, 1911; Redman and others, 1985). Currently (2001), there are 800 

feet of surface trenches and at least two adits, including a 120-foot-long upper adit and a 

320-foot-long lower adit. In 1934, a 52-foot inclined raise was driven by H. Jackson and 

A. Westhall. A stamp mill on the property had five,1,250-pound stamps (Roehm, 1936). 

Production notes:

 By 1914, 200 tons of ore had been processed in a Johnson rod mill; at least 15 ounces of 

gold and a small amount of silver were recovered. Later in 1914, B.L. Thane took over 

the property and recovered 85 ounces of gold from 300 tons of ore that was processed in a 

5-stamp mill (Roehm, 1936). 

Reserves:

 The Enterprise mine has an inferred resource of 24,600 short tons of ore with an average grade of 0.23 ounce of gold per ton (Redman and others, 1989). 

Additional comments:

 

References:

Knopf, 1911; Roehm, 1936; Roehm, 1942; Redman and others, 1985; Wells and others, 

TR021 
Alaska Resource Data File 

Page 45 

1986; Redman and others, 1989; Gehrels and Berg, 1992; Miller and others, 1994. 

Primary reference: Roehm, 1936 

Reporter(s): J.C. Barnett and L.D. Miller (Juneau, Alaska) 

Last report date: 11/27/01 

TR021 
Alaska Resource Data File 

Page 46 

Site name(s): Whigg Creek 

Site type: Mine 

ARDF no.: TR022 

Latitude: 58.0047 Quadrangle: TR A-6 

Longitude: 133.8046 

Location description and accuracy:

 The Whigg placer mine, labeled on the A-6 topographic map, is at sea level about one 

mile southwest of Sharp Point in Port Snettisham. It is near the northeast corner of section 6, T. 45 S., R. 71 E. of the Copper River Meridian. This is location T015 of Wells 

and others (1986). The location is accurate. 

Commodities: 

 Main: Au 

 Other: 

Ore minerals: 

Gangue minerals: 

Geologic description:

 The regional geology consists of pelitic schist, calc-silicate schist, marble, and quartzite 

(Brew and Ford,1985). Redman and others (1989) describe the rocks under the placer as 

black phyllite; a diorite pluton crops out approximately 1 mile to the west. Redman and 

others (1989) confirm the occurrence of gold in stream sediments at this site. The ruins 

of a log cabin are located on the north side of Port Snettisham just above the high tide line 

near the mouth of Whigg Creek (Redman and others, 1989). Wells and others (1986) report that claims were active from 1880 to 1982. 

Alteration:

 

Age of mineralization:

 Quaternary. 

Deposit model:

Placer gold (Cox and Singer, 1986; model 39a) 

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

39a 

TR022 
Alaska Resource Data File 

Page 47 

Production Status: Undetermined. 

Site Status: Inactive 

Workings/exploration:

 The ruins of a log cabin are located on the north side of Port Snettisham just above the 

high tide line near the mouth of Whigg Creek (Redman and others, 1989). Wells and others (1986) report that claims were active from 1880 to 1982. There may have been some 

minor placer gold production from the creek. 

Production notes:

 

Reserves:

 

Additional comments:

 

References:

Brew and Ford, 1985; Wells and others, 1986; Redman and others, 1989. 

Primary reference: Redman and others, 1989 

Reporter(s): J.C. Barnett and L.D. Miller (Juneau, Alaska) 

Last report date: 11/27/01 

TR022 
Alaska Resource Data File 

Page 48 

Site name(s): Mist Creek 

Site type: Occurrence 

ARDF no.: TR023 

Latitude: 58.0026 Quadrangle: TR A-6 

Longitude: 133.8568 

Location description and accuracy:

 This placer occurrence is on Mist Creek, about 1 mile from the northwest shore of Port 

Snettisham. It is in the NE1/4NE1/4 section 2, T. 45 S., R. 70 E. of the Copper River 

Meridian. The location is accurate within 1/4 mile. 

Commodities: 

 Main: Au 

 Other: 

Ore minerals: 

Gangue minerals: 

Geologic description:

 The regional geology consists of pelitic schist, calc-silicate schist, marble, and quartzite 

(Brew and Ford,1985). Gehrels and Berg (1992) show a small pluton of Cretaceous granodiorite west of the occurrence. Redman and others (1989) report that the rocks in the 

immediately area of the placer are diorite, black phyllite, and mafic metavolcanic rocks. 

Visible gold occurs in placer samples collected by the U.S. Bureau of Mines and placer 

claims were active in from 1980 to 1982 (Redman and others, 1989). 

Alteration:

 

Age of mineralization:

 Quaternary. 

Deposit model:

Placer gold (Cox and Singer, 1986; model 39a) 

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

39a 

Production Status: Undetermined. 

TR023 
Alaska Resource Data File 

Page 49 

Site Status: Inactive 

Workings/exploration:

 

Production notes:

 

Reserves:

 

Additional comments:

 

References:

Brew and Ford, 1985; Redman and others, 1989; Gehrels and Berg, 1992. 

Primary reference: Redman and others, 1989 

Reporter(s): J.C. Barnett and L.D. Miller (Juneau, Alaska) 

Last report date: 11/27/01 

TR023 
Alaska Resource Data File 

Page 50 

 References 

Bliss, J.D., ed., 1992, Developments in mineral deposit modeling: U. S. Geological Survey Bulletin 2004, 168 p. 

Brew, D.A., and Ford, A.B., 1969, Boundary Creek molybdenum-silver occurrence: U.S. Geological Survey Circular 615, 1969, p. 12-15 

Brew, D.A., and Ford, A.B., 1974, Geology of the Juneau Icefield and adjacent areas, in Carter, Claire, ed., U. S. 

Geological Survey Alaska Program, 1974: U.S. Geological Survey Circular 700, p. 63. 

Brew, D.A., and Ford, A.B., 1984, The northern Coast plutonic-metamorphic complex, southeastern Alaska and 

northwestern British Columbia, in Coonrad, W. L., and Elliott, R. L., eds., The U. S. Geological Survey 

in Alaska: accomplishments during 1981: U.S. Geological Survey Circular 868, p. 120-124. 

Brew, D.A., and Ford, A.B., 1985, Preliminary reconnaissance geologic map of the Juneau, Taku River, Atlin, 

and part of the Skagway 1:250,000 quadrangles, southeastern Alaska: U. S. Geological Survey OpenFile Report 85-395, 23 p., 2 sheets, scale 1:250,000. 

Buddington, A. F., 1925, Mineral investigations in southeastern Alaska: U.S. Geological Survey Bulletin 773, p. 

71-139. 

Clough, A., 1990, Bureau of Mines Mineral Investigations in the Juneau Mining District, Alaska, 1984-1988, 

Volume 2-Detailed mine, prospect, and mineral occurrence descriptions, Section E, Coast Range 

Subarea: U.S. Bureau of Mines Special Publication, 44 p. 

Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Sumdum and Taku River quadrangles, Alaska: U.S. Geological Survey Open-File Report 

78-698, 64 p. 

Cox, D.P., and Singer, D.A., eds., Mineral deposit models: U. S. Geological Survey Bulletin 1693, 1986, 379 p. 

Gehrels, G.E., and Berg, H.C., 1992, Geologic map of southeastern Alaska: U.S. Geological Survey Map I-1867, 

24 p., 1 sheet, scale 1:600,000. 

Gehrels, G.E., and Berg, H.C., 1994, Geology of southeastern Alaska, in Plafker, G., and Berg, H. C., eds., The 

geology of Alaska: The geology of North America, Volume G-1: Geological Society of America, Boulder, Colorado, p. 451-467. 

Kimball, A.L., Still, J.C., and Rataj, J.L., 1984, Mineral deposits and occurrences in the Tracy Arm-Fords Terror 

Wilderness Study Area and vicinity, Alaska: U.S. Geological Survey Bulletin 1515, p. 105-210. 

Knopf, Adolph, 1910, Mining in southeastern Alaska: U.S. Geological Survey Bulletin 442, p. 133-143. 

Knopf, Adolph, 1911, Mining in southeastern Alaska: U.S. Geological Survey Bulletin 480, p. 94-102 

Koch, D.K., Brew, D.A., and Ford, A.B., 1987, Newly discovered molybdenum occurrence near Boundary 

Creek, Coast Mountains, southeastern Alaska: U.S. Geological Survey Circular 998, 1987, p. 124-125 

Miller, L.D., Goldfarb, R.J., Gehrels, G,E., and Snee, L.W., 1994, Genetic links among fluid cycling, vein formation, regional deformation, and plutonism in the Juneau gold belt, southeastern Alaska: Geology 

(Boulder), v. 22, p. 203-206. 

Miller, L.D., Goldfarb, R.J., Snee, L.W., McClelland, W.C., and Klipfel, P.D., 1997, Paleocene molybdenum 

mineralization in the eastern Coast Batholith, Taku River region, and new age constraints on batholith 

evolution in Geologic studies in Alaska by the U.S. Geological Survey, 1995: U.S. Geological Survey 

References 
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Page 51 

Professional Paper 1574, p. 125-135. 

Pittman, T.L., 1957, Reconnaissance examination of Sunrise Canyon manganese, Slocum Inlet, Alaska: U. S. Bureau of Mines Open-File Report 57, 7 p. 

Redman, E.C., Maas, K.M., Kurtak, J.M., and Miller, L.D., 1989, Bureau of Mines Mineral Investigations in the 

Juneau Mining District, Alaska, 1984-1988, Volume 2-Detailed mine, prospect, and mineral occurrence 

descriptions, Section D, Juneau Gold Belt Subarea: U.S. Bureau of Mines Special Publication, 424 p. 

Redman, Earl, Roberts, W. S., Clough, A., and Kurtak, J., 1985, Juneau gold belt area: Preliminary mine, prospect, sample location maps and descriptions: U. S. Bureau of Mines Open-File Report 85-86, 68 p. 

Roehm, J.C., 1936, Preliminary report on the Enterprise property, Limestone Inlet: Alaska Territorial Department 

of Mines Property Examination 113-1, 6 p. 

Roehm, J.C., 1942, Summary and itinerary report of mining investigations in Limestone Inlet and Seymour Canal: 

Alaska Territorial Department of Mines Itinerary Report 195-34, 8 p. 

Roehm, J.C., 1943, Strategic and critical mineral occurrences in southeastern Alaska, Alaska Division of Geological and Geophysical Surveys MR 191-5. 

U.S. Bureau of Mines, 1973, Quadrangle map overlays showing mineral deposit locations, principal minerals, and 

number and type of claims, Taku River quadrangle: U.S. Bureau of Mines Open-File Report 20-73, 1 

sheet, 1:25,000 scale. 

Wells, D.E., Pittman, T.L., Brew, D.A., and Douglass, S.L., 1986, Map and description of the mineral deposits in 

the Juneau, Taku River, Atlin, and part of the Skagway quadrangles, Alaska: U. S. Geological Survey 

Open-File Report 85-717, 332 p. 

Wright, F.E., and Wright, C.W., 1906, Lode mining in southeastern Alaska, U.S. Geological Survey Bulletin 284, 

p. 30-54.

References