Sophie Gulch Mine

The Sophie Gulch Mine is a tungsten 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: Sophie Gulch Mine

Commodity

Primary: Tungsten
Tertiary: Gold
Tertiary: Lead

Location

State: Alaska

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1916
Year Last Production: 1917
Discovery Year: 1900
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

Not available

Materials

Ore: Scheelite
Ore: Galena
Ore: Gold
Gangue: Pyrite
Gangue: Quartz
Gangue: Calcite
Gangue: Feldspar

Comments

Comment (Deposit): ZONE OF RESIDUAL MATERIAL 3-15 FT THICK WAS DEVELOPED OVER SHEAR ZONE CONTAINING NUMEROUS IRREGULAR QUARTZ, QUARTZ-FELDSPAR, AND QUARTZ-CALCITE VEINS FROM LESS THAN 1 IN TO ABOUT 1 FT THICK; SCHEELITE-BEARING ZONE 50 FT BY 1000 FT; SCHEELITE AT VEIN MARGINS AND DISSEMINATED IN WALL ROCK; SURROUNDED BY PERIPHERAL ZONE OF AU DISSEMIANTED IN WALL ROCK; SCHEELITE-BEARING VEINS CROSS CUT BY ARSENOPYRITE-PYRITE-GALENA STRINGERS; SOME ARSENOPYRITE ALSO DISSEMIANTED IN WALL ROCK.

Comment (Workings): DEVELOPED BY 65 FT TUNNEL, 32 FT SHAFT, 28 FT SHAFT AND OPEN CUTS PRIOR TO 1916; 3 BULLDOZER CUTS IN 1942-43 SHOWED VERY LITTLE RESIDUAL MATERIAL LEFT BEHIND BY HYDRAULIC OPERATION.

Comment (Geology): STRUCTURAL DATA: CLEAVAGE IN SCHIST STRIKES N WITH 23 DEGREES EAST DIP; VERTICAL JOINTS STRIKE N 35 DEGREES W; MINERALIZED FRACTURES STRIKE N 45 DEGREES E WITH VERTICAL TO STEEP NW DIPS; MINERALIZATION IS OFFSET BY GOUGE-FILLED FAULTS THAT STRIKE N 18 DEGREES W AND DIP 54 DEGREES E.

Comment (Deposit): UNWEATHERED MATERIAL TOO LOW GRADE TO MINE, USGS, OFR 17, P. 3; LATER REPORTS OF SPHALERITE AND STIBNITE AT THIS PROSPECT APPEAR TO BE IN ERROR. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Comment (Location): USGS MF-247, LOC. 17. LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Comment (Production): 4000-5000 CY OF RESIDUAL MATERIAL SLUICED, 1916.

Comment (Development): EXPLORED VIA UNDERGOUND WORKINGS PRIOR TO 1916; HYDRAULICALLY MINED 1916-17; 3 BULDOZER CUTS MADE IN 1942-43; AK-KX-52-132.

References

Reference (Deposit): USGS MF-247, LOC. 17.

Reference (Deposit): USGS BULLETIN 1246, P. 121.

Reference (Deposit): USGS BULLETIN 1374, P. 83.

Reference (Deposit): USGS OFR 77-796-B, P. 29, LOC. 375-B.

Reference (Other Database): BAG-MF-463-98

Reference (Deposit): USBM RI 4174, P. 30-32.

Reference (Deposit): USGS BULLETIN 662, P. 433, 436, 457.

Reference (Deposit): USGS BULLETIN 722, P. 182, 233-234, 245-246.

Reference (Deposit): USGS OFR 17, P. 3.

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