Goyne

Site Name

Primary: Goyne
Secondary: Surprise
Secondary: Bear

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Commodity

Primary: Silver
Primary: Gold
Secondary: Tellurium
Secondary: Lead

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Location

State: Alaska
District: Homer

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Land Status

Not available

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Holdings

Not available

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Workings

Not available

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Ownership

Not available

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Production

Not available

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Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant:

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Physiography

Not available

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Mineral Deposit Model

Model Name: Low-sulfide Au-quartz vein

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Orebody

Not available

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Structure

Not available

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Alterations

Alteration Type: L
Alteration Text: Borden and others (1991) reported carbonization, sulfidization, sericitization, and silicification of the wall rock adjacent to the veins.

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Rocks

Not available

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Analytical Data

Not available

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Materials

Ore: Sylvanite
Ore: Pyrite
Ore: Gold
Ore: Galena
Ore: Arsenopyrite
Gangue: Quartz

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Comments

Comment (Workings): Workings / Exploration = Two tunnels were driven, and numerous trenches and prospect pits were dug on the property prior to 1934 (Pilgrim, 1933). Since that time the mine appears to have lain idle. The lower tunnel is at an elevation of 25 feet and the upper tunnel at 135 feet elevation. The tunnels are connected by a raise from which a total of 6,710 pounds of hand selected ore was produced. Samples from the lower working contained four ppm gold from a one foot vein and a sample from the stoped vein contained 200 ppm gold (Richter, 1970). A total of 600 feet of workings have been dug on the property.

Comment (Production): Production Notes = In 1931, 6,710 pounds of hand selected ore that was shipped to a smelter in Tacoma, Washington produced 4.10 ounces of gold and 1.72 ounces of silver per ton (Pilgrim, 1933).

Comment (Geology): Age = Tertiary; Boden and others (1991) report other veins in the district are about 55 m.y. old.

Comment (Reference): Primary Reference = Richter, 1970

Comment (Geology): Geologic Description = The country rock near the lower portal is black slate of the Cretaceous Valdez Group that has been intruded by a Tertiary granodioritic dike (Richter,1970). The dike is very irregular and segmented but overall has a east-west trend and dips 65 to 85S. In hand sample, the dike is a light gray color with a medium equigranular texture. No primary mafic minerals were observed, but abundant chlorite (10 percent volume) occurs in poorly defined patches and scattered interstitial fillings. Veinlets of quartz, zoisite, and potassium feldspar are abundant throughout the dike (Richter, 1970). ? the gold mineralization occurs in quartz veins which in places contain abundant arsenopyrite, with galena and pyrite. Gold mineralization seems to be more associated with galena than arsenopyrite (Pilgrim, 1931). Select high grade samples, taken from the surface at an elevation of about 600 feet, contained 158.16 ounces of gold and 58.92 ounces of silver per ton, and 0.72 percent tellurium as sylvanite (Smith, 1936, p. 31). The veins appear to be confined to the dike or local areas along dike-slate contacts. When veins pass into the slate, they pinch out or split into thin quartz stringers that pinch out. ? In the underground workings, the veins are exposed on both levels and along a raise connecting the two levels. The main vein in the upper adit, is about one-foot-wide and is exposed for 70 feet along strike. It strikes N85E and dips 75S. In the lower adit, the same vein is exposed for 100 feet and has a maximum width of 1.0 foot. Two random channel samples taken across the vein indicate a a fairly high gold content; 200 ppm gold across 0.9 foot in the upper adit and 40 ppm gold across one foot in the lower adit (Richter, 1970).

Comment (Exploration): Status = Inactive

Comment (Deposit): Model Name = Low-sulfide, Au-quartz vein (Cox and Singer, 1986; model 36a)

Comment (Deposit): Other Comments = This mine is within the Kenai Fjords National Park and is closed to mineral entry.

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References

Reference (Deposit): Berg, H.C., and Cobb, E.H., 1967, Metalliferous Lode Deposits of Alaska. U.S. Geological Survey Bulletin 1246, 254 p.

Reference (Deposit): Richter, D.H., 1970, Geology and lode-gold deposits of the Nuka Bay area, Kenai Peninsula, Alaska: U.S. Geological Survey Professional Paper 625-B, p. Bl-B16.

Reference (Deposit): Cobb, E.H., 1979, Summary of references to mineral occurrences (other than minerals fuels and construction materials) in the Seldovia quadrangle, Alaska: U.S. Geological Survey Open-file Report 80-87, 47 p.

Reference (Deposit): Capps, S.R., 1938, Lode mining in the Nuka Bay district, in Smith, P.S., Mineral industry of Alaska in 1936: U.S. Geological Survey Bulletin 897-A, p. 25-32.

Reference (Deposit): Borden, J.C., Goldfarb, R.J., Gent, C.A., Burruss, R.C., and Roushey, B.H., 1992 Geochemistry of lode-gold deposits, Nuka Bay district, southern Kenai Peninsula: Geologic studies in Alaska by the U.S. Geological Survey, 1991: U.S. Geological Survey Bulletin 2041, p. 13-21.

Reference (Deposit): MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.

Reference (Deposit): Pilgrim, E.R., 1933, Progress of lode mining in interior Alaska, 1932: Alaska Territorial Department of Mines Miscellaneous Report 194, 11 p.

Reference (Deposit): Cobb, E.H., 1972, Metallic minerals resources map of the Seldovia quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-397, 1 sheet, scale 1:250,000.

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