Lake

The Lake is a lead, zinc, and silver mine located in Alaska.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

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Site Name

Primary: Lake
Secondary: Margery Group

Commodity

Primary: Lead
Primary: Zinc
Primary: Silver

Location

State: Alaska
District: Petersburg

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

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

Physiography

Not available

Mineral Deposit Model

Model Name: Polymetallic veins

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

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

Comments

Comment (Exploration): Status = Inactive

Comment (Reference): Primary Reference = Gault and others, 1953 (p. 41-46)

Comment (Geology): Geologic Description = Quartz-calcite veins, breccia fillings, and stringer 'veins' occur along a prominent fault zone 10-20 feet thick that cuts dark-colored phyllite and slate, quartzite, chlorite schist, and biotite schist west of a large Cretaceous biotite tonalite to granodiorite pluton (Brew, 1997 [OF 97-156-C]). The veins contain galena, sphalerite, pyrite, and chalcopyrite in a quartz-carbonate gangue (Gault and others, 1953). Average grade of seven mineralized samples is about 1% Pb, 1% Zn, and 0.12 ounces Ag per ton.

Comment (Production): Production Notes = One ton of ore shipped to smelter in 1920 (Gault and others, 1953).

Comment (Workings): Workings / Exploration = First staked in about 1900; considerable surface trenching and 200-250 feet of underground workings from three adits (Gault and others, 953). Apparently no or little active exploration since at least the early 1950's. Claims active intermittently to at least 1978 (U.S. Bureau of Mines, 1980).

Comment (Deposit): Model Name = Polymetallic vein?

References

Reference (Deposit): Gault, H.R., Rossman, D.L., Flint, G.M., Jr., and Ray, R.G., 1953, Some lead-zinc deposits of the Wrangell district, Alaska: U.S. Geological Survey Bulletin 998-B, p. 15-58.

Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Petersburg quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-415, 1 sheet, scale 1:250,000.

Reference (Deposit): Grybeck, D.J., Berg, H.C., and Karl, S.M., 1984, Map and description of the mineral deposits in the Petersburg and eastern Port Alexander quadrangles: U.S. Geological Survey Open-File Report 84-837, 86 p., 1 sheet, scale 1:250,000.

Reference (Deposit): Buddington, A.F., 1923, Mineral deposits of the Wrangell district; U.S. Geological Survey Bulletin 739, p. 51-75.

Reference (Deposit): U.S. Bureau of Mines, 1980, Claim map, Petersburg quadrangle, Alaska: U.S. Bureau of Mines Map 117, 1 sheet, scale 1:250,000.

Reference (Deposit): Wright, F.E., and Wright, C.W., 1908, The Ketchikan and Wrangell mining districts, Alaska: U.S. Geological Survey Bulletin 347, 210 p.

Reference (Deposit): Wright, F.E., and Wright, C.W., 1905, Economic developments in southeastern Alaska: U.S. Geological Survey Bulletin 259, p. 47-68.

Reference (Deposit): Brew, D.A., 1997, Reconnaissance geologic map of the Petersburg B-1 quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 97-156-C, 20 p., 1 sheet, scale 1:63,360.

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