Brown Bear

Prospect in Alaska, United States with commodities Silver, Gold, Lead, Zinc

Geologic information

Identification information

Deposit ID 10003443
MRDS ID A106200
Record type Site
Current site name Brown Bear
Alternate or previous names Norris Lead-Zinc Inc.

Geographic coordinates

Geographic coordinates: -147.37258, 61.08958 (WGS84)
Relative position On slope south of Miners River, 2,500 ft northwest of Peak 1,290. Accurate within 2,600 ft. Locality A-12 of Jansons and others (1984).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary
Lead Primary
Zinc Primary

Materials information

Materials Type of material
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) -147.37258, 61.08958

Comments on the geologic information

  • Geologic Description = Jansons and others (1984) reported two mineralized quartz veins in sandstone, siltstone, and mudstone of the Tertiary Orca Group. The veins are from a few inches to 18 inches wide and contain galena, sphalerite, pyrite, and calcite. Two grab samples contain from 4.45 to 17.78 percent Pb, 12.29 to 28.88 percent Zn, 3.6 to 28.8 oz/ton Ag, and 0.08 to 0.19 oz /ton Au (Pilgrim, 1930).
  • Age = Paleocene or younger; veins cut sandstone, siltstone, and mudstone of the Tertiary Orca Group.

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Prince William Sound

Comments on the reserve resource information

  • Reserves = Inferred reserves are 400 tons at 2.5 percent Zn, 0.8 percent Pb, and 8.5 ppm Ag (Dahners, 1947).

Comments on the workings information

  • Workings / Exploration = A 6 ft long adit is the extent of the development. Pilgrim (1930) reported two grab samples contained from 4.45 to 17.78 percent Pb, 12.29 to 28.88 percent Zn, 3.6 to 28.8 oz/ton Ag, and 0.08 to 0.19 oz /ton Au.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A106200
USGS Alaska Resource Data File ARDF AN146

Bibliographic references

  • Deposit

    Dahners, L.A., 1947, Preliminary report on the Brown Bear lead and zinc claims near Miner Lake, Prince William Sound, Alaska: Alaska Territorial Department of Mines Prospect Evaluation 85-14, 7 p., 1 sheet.

  • Deposit

    Jansons, Uldis, Hoekzema, R.B., Kurtak, J.M., and Fechner, S.A., 1984, Mineral occurrences in the Chugach National Forest, Southcentral Alaska: U.S. Bureau of Mines Open-File Report 5-84, 218 p., 2 sheets, scale 1:250,000.

  • Deposit

    Pilgrim, E.R., 1930, A.D. Thompson's lead-zinc property: Alaska Territorial Department of Mines Miscellaneous Report 193-2, 38 p.

Comments on the references

  • Primary Reference = Jansons and others, 1984

General comments

Subject category Comment text
Deposit Model Name = Polymetallic veins ? (Cox and Singer, 1986; model 22c ? )

Reporter information

Type Date Name Affiliation Comment
Reporter 30-JUL-1998 D.P. Bickerstaff U.S. Geological Survey
Reporter 30-JUL-1998 S.W. Huss U.S. Geological Survey