Lake

Past Producer in Alaska, United States with commodities Silver, Lead, Zinc

Geologic information

Identification information

Deposit ID 10097485
MRDS ID A010330
Record type Site
Current site name Lake
Alternate or previous names Margery Group

Geographic coordinates

Geographic coordinates: -132.09684, 56.47375 (WGS84)
Relative position Location known accurately as shown in Gault and others (1953). About two miles east of the east end of Virginia Lake at an elevation of about 1200 feet. The site is shown on current (1998) 1:63,360-scale topographic maps. Locality 40 of Grybeck, Berg, and Karl (1984).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Lead Primary
Zinc Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Pyrite Ore
Sphalerite Ore
Calcite Gangue
Quartz Gangue

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Nearby scientific data

(1) -132.09684, 56.47375

Comments on the geologic information

  • 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.

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Petersburg

Comments on the production information

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

Comments on the workings information

  • 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).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF PE038
USGS Mineral Resources Data System MRDS A010330

Bibliographic references

  • Deposit

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

  • Deposit

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

  • Deposit

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

  • 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.

  • 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.

  • 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.

  • 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.

  • 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.

Comments on the references

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

General comments

Subject category Comment text
Deposit Model Name = Polymetallic vein?

Reporter information

Type Date Name Affiliation Comment
Reporter 01-NOV-1998 H.C. Berg U.S. Geological Survey
Reporter 01-NOV-1998 D.J. Grybeck U.S. Geological Survey