The Brown Bear is a zinc, lead, gold, 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
Elevation:
Commodity: Zinc, Lead, Gold, Silver
Lat, Long: 61.09, -147.37000
Map: View on Google Maps
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Brown Bear MRDS details
Site Name
Primary: Brown Bear
Secondary: Norris Lead-Zinc Inc.
Commodity
Primary: Zinc
Primary: Lead
Primary: Gold
Primary: Silver
Location
State: Alaska
District: Prince William Sound
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Prospect
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: Galena
Ore: Pyrite
Ore: Sphalerite
Gangue: Calcite
Gangue: Quartz
Comments
Comment (Reference): Primary Reference = Jansons and others, 1984
Comment (Reserve-Resource): Reserves = Inferred reserves are 400 tons at 2.5 percent Zn, 0.8 percent Pb, and 8.5 ppm Ag (Dahners, 1947).
Comment (Workings): 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.
Comment (Deposit): Model Name = Polymetallic veins ? (Cox and Singer, 1986; model 22c ? )
Comment (Geology): 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).
Comment (Exploration): Status = Inactive
Comment (Geology): Age = Paleocene or younger; veins cut sandstone, siltstone, and mudstone of the Tertiary Orca Group.
References
Reference (Deposit): Pilgrim, E.R., 1930, A.D. Thompson's lead-zinc property: Alaska Territorial Department of Mines Miscellaneous Report 193-2, 38 p.
Reference (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.
Reference (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.
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