Beaver

The Beaver is a zinc 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: Beaver

Commodity

Primary: Zinc
Secondary: Lead

Location

State: Alaska
District: McGrath

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: Mississippi Valley, S.E. Missouri Pb-Zn
Model Name: Mississippi Valley, updated
Model Name: Mississippi valley, without Missouri

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: White vuggy dolomite; galena to oxidized cerrusite.

Rocks

Role: Host
Age Type: Host Rock
Age Young: Late Silurian
Age Old: Early Ordovician

Analytical Data

Not available

Materials

Ore: Smithsonite
Ore: Galena
Ore: Cerussite
Gangue: Dolomite

Comments

Comment (Workings): Workings / Exploration = The Beaver prospect was discovered by WGM Inc. and Patino Ltd. during exploration for base metals on lands in the 'Reef Ridge district.' Sporadic surface investigations were continued by Pasminco Ltd. until about 1989. Grab samples from cerussite-rich gossan contain up to 32.7 percent zinc and 34.5 percent lead. A continuous trench sample that was composed of about 80 percent gossan contained 19.25 percent zinc and 0.90 percent lead over a 40 feet (12 m) channel interval (Schmidt, 1997).

Comment (Geology):

Comment (Geology): Geologic Description = (Schmidt, 1997).

Comment (Reference): Primary Reference = Schmidt, 1997

Comment (Commodity): Gangue = ferrigenous gossan

Comment (Deposit): Model Name = Southeast Missouri Pb-Zn (Cox and singer, 1986; model no. 32a) or Mississippi Valley Type

Comment (Geology): Age = Host rock is Ordovician-Silurian, based on fossils in host unit (Blodgett, 1982); however, the age of the mineralization is unknown.

Comment (Deposit): Other Comments = See Bermuda (MD045), Hillside (MD049), and Big Gate (MD050) Mississippi Valley Type occurrences in Medfra B-3 quadrangle.

Comment (Exploration): Status = Inactive

Comment (Commodity): Gangue = secondary carbonate

References

Reference (Deposit): Schmidt, J.M., 1997, Shale-hosted Zn-Pb-Ag and barite deposits of Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Mineral Deposits of Alaska, 1997: Economic Geology Monograph 9, p. 35-65.

Reference (Deposit): Anderson, G.M., and Macqueen, R.W., 1988, Mississippi Valley Type lead-zinc deposits, in Roberts, R.G., and Sheahan, P.A., eds., Ore deposit models: Geoscience Canada Reprint Series 3, Ottawa, Canada, p. 79-90.

Reference (Deposit): Dutro, T.T. Jr., and Patton,W.W. Jr., 1982, New Paleozoic Formations in the northern Kuskokwim Mountains, west-central Alaska: U.S. Geological Survey Bulletin 1529-H, p. H13-H22.

Reference (Deposit): Blodgett, R.B., 1982, Stratigraphy of Reef Ridge project area: WGM Inc., Anchorage, Alaska, Reef Ridge Project area, Block 10, Doyon region: 34 pages.

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