Brown Zinc

Site Name

Primary: Brown Zinc
Secondary: Suzy

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Commodity

Primary: Gold
Primary: Silver
Secondary: Zinc
Secondary: Copper
Secondary: Lead

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Location

State: Alaska
District: Alaska Peninsula

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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: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:

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Physiography

Not available

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Mineral Deposit Model

Model Name: Polymetallic veins

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Orebody

Not available

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Structure

Not available

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Alterations

Alteration Type: L
Alteration Text: The country rock is propylitically altered.

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Rocks

Not available

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Analytical Data

Not available

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Materials

Ore: Sphalerite
Ore: Pyrite
Ore: Gold
Ore: Galena
Ore: Chalcopyrite
Gangue: Quartz
Gangue: Calcite

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Comments

Comment (Geology): Age = Eocene or younger.

Comment (Reference): Primary Reference = Peterson and others, 1982

Comment (Workings): Workings / Exploration = Early workings on this prospect included a 130-foot adit and an 18-foot drift. UNC Teton Exploration Drilling Company sampled and mapped the deposit in 1982. Battle Mountain Exploration Company sampled it in 1986. The U.S. Geological Survey sampled the prospect in the 1980s. A dump sample 82AWs50, assayed 3 ppm silver, 300 ppm arsenic, 100 ppm copper, 10,000 ppm lead, and 4,700 ppm zinc.

Comment (Deposit): Model Name = Epithermal gold vein, Polymetallic vein (Cox and Singer, 1986, model 22c)

Comment (Deposit): Other Comments = This prospect is located on land patented by, or interim-conveyed to, the Aleut Corporation.

Comment (Geology): Geologic Description = The Suzy prospect is in volcanic rocks belonging to the Popof volcanic rocks of late Eocene to early Oligocene age (Wilson and others, 1995). A 130-foot adit and 18-foot drift are evidence of work probably done in the early 1900's. The deposit was mapped and sampled by UNC Teton Exploration Drilling Company in 1982 (Peterson and others, 1982), and by Battle Mountain Exploration Company in 1986. It consists of a system of veins that strikes N 7 E and dips steeply to the northwest. It has a 200-foot vertical extent and a possible strike length of 700 feet. The vein system is 6 to 15 feet in width and is made up of several subparallel quartz-calcite veins. Pyrite, sphalerite, galena, and chalcopyrite are present, especially along the vein margins. Channel samples collected from surface exposures by UNC Teton Exploration Drilling Company assayed as much as 0.624 ounce of gold and 1.63 ounces of silver per ton and 13.8 percent combined copper, lead, and zinc Three continuous chip samples collected by Battle Mountain Exploration Company over 6 feet of vein averaged 0.212 ounce of gold per ton. At the end of the drift, 6 feet of sulfide-rich rock assayed only 0.04 ounce of gold per ton. A 2-foot channel sample collected at the end of the drift by UNC Teton Exploration Drilling, Inc. assayed 410 ppm copper, 0.85 percent lead, 14,100 ppm zinc, 0.06 ppm gold, and 4.6 ppm silver. There is no apparent relationship between gold values and sulfide content.

Comment (Exploration): Status = Inactive

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References

Reference (Deposit): MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous mineral deposits in the western part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-F, 38 p., 1 sheet, scale 1:1,000,000.

Reference (Deposit): Wilson, F.H., Detterman, R.L., Miller, J. W., and Case, J.E., 1995, Geologic map of the Port Moller, Stepovak Bay, and Simeonof Island quadrangles, Alaska: U.S. Geological Survey Miscellaneous Investigation Series Map I-2272, 1 map sheet, scale 1:250,000.

Reference (Deposit): Wilson, F.H., White, W.H., and DuBois, G.D., 1988, Brief descriptions of mines, prospects, and mineral occurrences in the Port Moller and Stepovak Bay quadrangles, Alaska Peninsula: U.S. Geological Survey Open-File Report 88-666, 128 p., scale 1:250,000.

Reference (Deposit): Pilcher, S.H., 1986, Unga project: Battle Mountain Exploration Company report, 33 p. (Report held by the Aleut Corporation, Anchorage, Alaska.)

Reference (Deposit): Atwood, W.W., 1911, Geology and mineral resources of parts of the Alaska Peninsula: U.S. Geological Survey Bulletin 467, 137 p.

Reference (Deposit): Webber, B.S., Moss, J.M., Rutledge, F.A., and Sanford, R.S., 1946, Reconnaissance examinations of parts of the Alaska Peninsula and Aleutian Islands southwestern Alaska: U.S. Bureau of Mines, unpublished report of investigations, 40 p. (Unpublished report held by the U.S. Geological Survey, Anchorage.)

Reference (Deposit): Peterson, R.J., Lemmers, J., Handverger, P., Gallagher, J., Pilcher, R., East, J., Macleod, T., Bartels. E., 1982, Geology and precious metals potential Unga, Popof, and Korovin Islands, Shumagin Group, Aleutian Chain, Alaska: UNC Teton Exploration Drilling Company report, 127 p., 5 map sheets, various scales. (Report held by the Aleut Corporation, Anchorage, Alaska.)

Reference (Deposit): U.S. Bureau of Mines, 1973, Alaska 1:250,000-scale quadrangle map overlays showing mineral deposit locations, principal minerals, and number and type of claims: U.S. Bureau of Mines Open-File Report 20-73, 95 overlays (updated in 1986, 1987).

Reference (Deposit): Christie, J.S., 1974, Aleut-Quintana-Duval 1974 joint venture, final report: Unpublished Quintana Minerals Corporation report, 24 p., 3 appendices, 2 maps. (Report held by the Aleut Corporation, Anchorage, Alaska.)

Reference (Deposit): Angeloni, L.M., Wilson, F.H., and Sutlet, S., 1985, Map and tables showing preliminary rock geochemical data, Port Moller, Stepovak Bay, and Simeonof Island quadrangles, Alaska: U.S. Geological Survey Open-File Report 85-470, 179 p., 1 map sheet, scale 1:250,000.

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