Bohemia Basin Nickel-Copper Prospect

The Bohemia Basin Nickel-Copper Prospect is a nickel and copper mine located in Alaska at an elevation of 1,499 feet.

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

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Bohemia Basin Nickel-Copper Prospect
Secondary: North and South Takanis Ore Bodies
Secondary: Mayflower and Portia Claim Groups.

Commodity

Primary: Nickel
Primary: Copper
Tertiary: Cobalt

Location

State: Alaska
District: Chichagof

Land Status

Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Discovery Year: 1921
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Analytical Data: SULFIDE LENSES CONTAIN UP TO 3.6% NI, BUT AVERAGE GRADE IS MUCH LESS-USGS B 931-F, P. 125

Materials

Ore: Chalcopyrite
Ore: Pentlandite

Comments

Comment (Deposit): MAGMATIC SEGREGATIONS OF PYRRHOTITE, PENTLANDITE, CHALCOPYRITE, AND MAGNETITE ERRATICALLY DISTRIBUTED AS BLEBS IN NORITE BODY. ALL SULFIDE-BEARING NORITE LIES WITHIN 250 FT. OF NORITE CONTACT WITH GABBRO AND AMPHIBOLITE SCHIST BENEATH. TWO MAIN ORE BODIES ARE PRESENT, LARGEST BEING SOUTH TAKANIS 550 FT. LONG AND 200 FT. WIDE, AND NORTH TAKANIS, 200 FT. LONG AND 50 FT. WIDE. IN NORTH TAKANIS ORE BODY, SEVERAL MASSIVE SULFIDE LENSES UP TO 3 FT. AND 30 FT. LONG CROP OUT AT SURFACE.

Comment (Workings): 3 PROSPECT PITS TOTALING 238 FT., 2 PITS IN SOUTH AND 1 IN NORTH TAKANIS ORE BODIES.

Comment (Reserve-Resource): USGS B 931-F, P. 129

Comment (Location): USGS B 931-F, PLATE 22; USGS MF-467, LOC. 1; USGS MF-1476 B, LOC. 3. LOCATION IS ON SOUTH TAKANIS ORE BODY. NORTH TAKANIS ORE BODY IS 500 FT. NW. LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Comment (Development): OVER 100 CLAIMS STAKED IN AREA. MAYFLOWER AND PORTIA CLAIM GROUPS STAKED IN 1939. SEVERAL PROSPECT PITS DUG BY 1941, BUT NO DRILLING. NO PRODUCTION.

Comment (Geology): NORITE BODY UNDERLAIN BY GABBRO, AMPHIBOLITE SCHIST, HORNFELS. YOUNGER QUARTZ DIORITE IN CONTACT WITH NORITE. GABBRO, NORITE, AND DIORITE BELIEVED TO BE SUCCEEDING DIFFERENTIATES OF MAGMA OF COMPOSITE STOCK.

Comment (Deposit): NORTH AND SOUTH TAKANIS ORE BODIES THOUGHT TO BE CONTINUATION OF SAME MINERALIZED NORITE BODY AS EAST AND WEST TRIPOD, TUNNEL, SIDE HILL, AND NORTH AND SOUTH MUSKEG ORE BODIES 0.7 MI TO THE SE. ; INFO.SRC : 1 PUB LIT

Comment (Deposit): THIS SITE NAME WAS CREATED BY THE REPORTER OR OTHER USGS EMPLOYEE BASED ON PROXIMITY TO SOME MAJOR GEOGRAPHIC FEATURE.

References

Reference (Deposit): USGS B 931-F, P. 105-138, PLATE 22 (1941)

Reference (Deposit): USGS B 947-C, P. 42-55 (1946)

Reference (Deposit): USGS MF-467, LOC. 2 (1972)

Reference (Deposit): USGS OF 78-450, P. 20-23 (1978)

Reference (Deposit): USGS MF-1476-B (1983)

Reference (Other Database): BAG-B-931-F-PL-22

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