Spruce Hen Prospect

The Spruce Hen Prospect 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

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: Spruce Hen Prospect

Commodity

Primary: Tungsten
Tertiary: Molybdenum

Location

State: Alaska
District: Fairbanks

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

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

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Ground-Water Leaching Of Scheelite In Weathered Zone May Have Occured

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Molybdenite
Ore: Scheelite
Gangue: Clinozoisite
Gangue: Diopside
Gangue: Calcite
Gangue: Hornblende
Gangue: Garnet
Gangue: Vesuvianite

Comments

Comment (Deposit): NO GOLD ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Comment (Location): USGS MF-410, LOC. 29. PROSPECT ON THE DIVIDE BETWEEN THE HEADWATERS OF STEELE AND FIRST CHANCE CREEKS. LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Comment (Development): CLAIMS STAKED BY SUMMER, 1916. 5 LODES PROSPECTED BY TRENCHES. NO RECORD OF ANY PRODUCTION.

Comment (Deposit): SMALL GRAINS OF SCHEELITE ARE DISSEMINATED THROUGHOUT 5 LODES AS MUCH AS 4 FT. WIDE IN SCHIST WITH SOME INTERBEDDED LIMESTONE AND METAMORPHOSED BASIC IGNEOUS ROCK. LODES ARE SKARN DEPOSITS WITH SCHEELITE, FLUORITE, GARNET, AND OTHER TYPICAL CONTACT-METAMORPHIC MINERALS THAT REPLACED LIMESTONE; ABOUT 3 FT. THICK. ONE LODE IS CUT BY BY SCHEELITE-BEARING QUARTZ VEIN. SCHEELITE IN ZONES IN BLOCKS OF ALTERED IGNEOUS ROCK (MAINLY HORNBLENDE) ON DUMP. A LITTLE MOLYBDENITE REPORTED IN ORE

Comment (Workings): WORKINGS CONSISTED OF A 70 FT. INCLINED SHAFT, PITS, AND TRENCHES

Comment (Geology): SEAMS OF GOUGE ALONG WALLS OF LODE. DEPOSIT ALONG WESTERN PERIPHERY OF LARGE BODY OF PORPHYRITIC GRANITE. SCHEELITE CONCENTRATIONS IN ZONES AS MUCH AS 6 IN. WIDE.

References

Reference (Deposit): USGS MF-410 (D-2), LOC. 29

Reference (Deposit): USGS BULL. 662, P. 422-423.

Reference (Deposit): USGS BULL. 188, 201-203.

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