Unnamed (at head of Goat Hollow)

Occurrence in Alaska, United States with commodities Silver, Gold, Copper

Geologic information

Identification information

Deposit ID 10308243
Record type Site
Current site name Unnamed (at head of Goat Hollow)

Geographic coordinates

Geographic coordinates: -135.86212, 59.44975 (WGS84)
Relative position This occurrence is at an elevation of approximately 5,400 feet on the ridge at the head of the Goat Hollow drainage. It is about 3.7 miles, N20E from the village of Klukwan in the NE1/4, section 15, T. 28 S., R. 56 E. of the Copper River Meridian. It is in the approximate center of a line of samples, numbers 766 to 771, shown on sheet 2 of Gilbert and others (1991) and is included within the area of number 29 on sheet 1 of Still and others (1991).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary
Copper Primary

Materials information

Materials Type of material
Bornite Ore
Chalcopyrite Ore
Malachite Ore

Nearby scientific data

(1) -135.86212, 59.44975

Comments on the geologic information

  • Geologic Description = Still and others (1991) informally refer to this as the 'Goat Hollow' occurrence. They collected a sample from a chalcopyrite-bornite lens about 0.5 feet in width that contained 15.052 ppm gold, 54.2 ppm silver and, 21.8% copper. Other bedrock and float samples collected at this locality contained up to 0.72 ppm gold, 4.1 ppm silver, and 1.2% copper (samples F103 to F105 of sheet 1 and samples 766 to 771 of sheet 2 of Gilbert and others, 1991). Sample descriptions by Gilbert and others (1991) include foliated diorite and pyroxenite, diorite, monzodiorite, and ultramafic rock with feldspar veinlets. In the area of the anomalous samples, Gilbert and others (1987) have mapped a steep fault that strikes northwesterly and separates Cretaceous diorite and quartz diorite to the southwest from Cretaceous monzodiorite and quartz monzodiorite to the northeast. They consider the monzodiorite and quartz monzodiorite to be part of the compositionally zoned, Kashagnak pluton of Redman and others (1984), but believe the diorite and quartz diorite are older. It is unclear if the mineralization is related to the faulting or to a particular intrusive rock unit. If the deposit is related to the intrusives, the mineralization is Cretaceous or younger in age.
  • Age = If the deposit is related to intrusive rocks, the mineralization is Cretaceous or younger in age.

Economic information

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Probably inactive

Mining district

District name Juneau (Skagway subdistrict)

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF SK029

Bibliographic references

  • Deposit

    MacKevett, E.M., Jr., Robertson, E.C., and Winkler, G.R., 1974, Geology of the Skagway B-3 and B-4 quadrangles, southern Alaska: U.S. Geological Survey Professional Paper 832, 33 p.

  • Deposit

    Redman, E.C., Retherford, R.M., and Hickok, B.D., 1984, Geology and geochemistry of the Skagway B-2 Quadrangle, southeastern Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 84-31, 34 p., 4 sheets, scale 1:40,000.

  • Deposit

    Gilbert, W.G., Burns, L.E., Redman, E.C., and Forbes, R.B., 1987, Preliminary bedrock geology and geochemistry of the Skagway B-3 Quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 87-2, 2 sheets, scale 1:36,200.

  • Deposit

    Gilbert, W.G., Still, J.C., Burns, L.E., Wier, K.R., and Redman, E.C., 1991, Geochemistry of Haines-Klukwan-Porcupine area, southeastern Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 91-5, 1 sheet, scale 1:63,360, 75 p.

  • Deposit

    Still, J.C., 1991, Bureau of Mines mineral investigations in the Juneau mining district, Alaska, 1984 - 1988, v. 2, Detailed mine, prospect, and mineral occurrence descriptions, section A, Haines-Klukwan-Porcupine subarea: U.S. Bureau of Mines of Mines Special Publication, 214 p.

  • Deposit

    Still, J.C., Hoekzema, R.B., Bundtzen, T.K., Gilbert, W.G., Wier, K.R., Burns, L.E., and Fechner, S.A., 1991, Economic geology of Haines-Klukwan-Porcupine area, southeastern Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 91-4, 156 p., 5 sheets, scale 1:63,360.

Comments on the references

  • Primary Reference = Still and others, 1991

Reporter information

Type Date Name Affiliation Comment
Reporter 04-FEB-01 T.C. Crafford T. Crafford & Associates