The Many Values Pegmatite Prospect is a mica, beryllium, and tantalum mine located in Albany county, Wyoming.
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: Mica, Beryllium, Tantalum
Lat, Long: 41.04952, -106.17495
Map: View on Google Maps
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Many Values Pegmatite Prospect MRDS details
Site Name
Primary: Many Values Pegmatite Prospect
Secondary: Many Values Prospect
Commodity
Primary: Mica
Primary: Beryllium
Primary: Tantalum
Secondary: Niobium (Columbium)
Secondary: Garnet
Secondary: REE
Tertiary: Uranium
Location
State: Wyoming
County: Albany
Land Status
Not available
Holdings
Not available
Workings
Type: Underground
Ownership
Not available
Production
Year: 1942
Material type: Production from up to 1942 was 36,600 pounds scrap mica, 2,500 pounds punch mica, 500 pounds rifted sheet mica, 2 tons beryl, and 85 pounds tantalite-columbite.
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: pegmatite
Operation Type: Surface
Mining Method: Unknown
Year First Production: 1942
Discovery Year: 1930
Years of Production:
Organization:
Significant: N
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains
Mineral Deposit Model
Model Name: Pegmatites
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Name: Pegmatite
Role: Host
Age Type: Host Rock
Age Young: Neoproterozoic
Analytical Data
Not available
Materials
Ore: Muscovite
Ore: Tantalite
Ore: Beryl
Unknown: Fergusonite
Unknown: Tourmaline
Unknown: Albite
Unknown: Cleavelandite
Unknown: Garnet
Comments
Comment (Deposit): "The pegmatite cuts pre-Cambrian tourmalinized mica schist and gneiss. There are two open pits and two timbered shafts. The pegmatite strikes N50E and dips 85 NW with exposures for 140 ft. Seventy-five feet north of the main pegmatite body is a quartz-potash feldspar-mica-plagioclase pegmatite which stirkes north and is vertical; it is apparently not connected with the larger body. Cover prevents an accurate estimate of the extent of the pegmatite beyond the workings. Muscovite is abundant near the hanging wall in the larger pegmatite. The books are light-green speckled with magnetite, and ruled. Only a small quantity is of sheet quality; about 10% is punch quality. Up to 1943, 38,000 lbs of scrap mica, 2,500 lbs of punch and 500 lbs of rifted mica were produced. Two tons of beryl (12.39% BeO) were shipped up to 1942. The beryl crystals are corroded. Small tantalite crystals (45% Ta2O3) are rare in this district; about 85 lbs were recovered up to 1943. Minor accessory minerals include fergusonite(?) and pink euhedral garnets and orange subhedral garnets about 13mm in diameter." (Bull. 50, p. 132)
Comment (Commodity): Record 0560010077 (10181544) citing "AEC PRELIM FIELD INV-AIRBPRNE ANOMALIES" listed Uranium as a commodity. This record has been deleted. The only citation is to an anomaly. That this site could be anomalous in U is duly noted.
Comment (Deposit): GARNETS UP TO 13 MM IN PEGMATITE CUTTING PRECAMBRIAN SCHIST
Comment (Deposit): "Minor quantities of fergusonite(?) occur in a pegmatite that cuts pre-Cambrian tourmalinized mica schist and gneiess. The pegmatite strikes N50E and dips 85NW with exposures for 140 ft. The pegmatite was mined for mica, beryl, and tantalite in 1942 and 1943." [Bull. 50, 1966, p. 220.]
References
Reference (Deposit): WGS BULL 50, 1966, p. 132, 220.
Pages: p. 132, 220.
Reference (Production): HANLEY AND OTHERS, 1950, USGS PROF. PAPER 227
Reference (Deposit): HANLEY, J. B., AND OTHERS, 1950, PEGMATITE INVESTIGATIONS IN COLORADO, WYOMING, AND UTAH, 1942-44, USGS PROF. PAPER 227, p. 107-108.
Reference (Deposit): Hausel, W.D., 1993, Guide to the geology, mining districts, and ghost towns of the Medicine Bow Mountains and Snowy Range Scenic Byway: Geological Survey of Wyoming Public Information Circular No. 32, 53 p.
Pages: p. 40.
Reference (Deposit): Hausel and Sutherland, 2000, WSGS Bull. 71, 268 p.
Pages: p. 43-44.
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