The Unnamed Pegmatite is a mine located in Gunnison county, Colorado at an elevation of 8,176 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
Elevation: 8,176 Feet (2,492 Meters)
Commodity:
Lat, Long: 38.3925, -107.13722
Map: View on Google Maps
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Unnamed Pegmatite MRDS details
Site Name
Primary: Unnamed Pegmatite
Commodity
Tertiary: Molybdenum
Tertiary: Iron
Location
State: Colorado
County: Gunnison
District: Wolf Creek Area
Land Status
Land ownership: BLM Administrative Area
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 Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Type: R
Description: Gunnison Uplift, San Juan Volcanic Field
Type: L
Description: Gunnison Gold Belt, Unnamed Fault, Tolvar Peak Stock
Alterations
Not available
Rocks
Name: Syenite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic
Name: Syenite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Neoproterozoic
Name: Syenite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Analytical Data
Not available
Materials
Ore: Molybdenite
Gangue: Quartz
Gangue: Microcline
Gangue: Hornblende
Gangue: Sphene
Comments
Comment (Deposit): SMALL STOCK OF PORPHYRITIC AUGITE SYENITE INTRUDES COMPLEX OF SCHIST AND GNEISS CONTAINING LAYERS OF AMPHIBOLITE AND HORNBLENDE SCHIST WITH BEDDING AND FOLIATION TRENDING GENERALLY EAST-WEST, DIPPING SOUTH. SYENITE INTRUDED BY GRANITE DIKES, QUARTZ VEINS, AND LEUCOSYENITE. ON PERIPHERY OF MAIN MASS ARE SMALL BODIES OF APPARENTLY OLDER MELASYENITE. NW OF STOCK IS SWARM OF NE-TRENDING GRANITE-QUARTZ MONZONITE DIKES. NORTH END OF STOCK IS OFFSET BY FAULT TRENDING GENERALLY N 35 E AND WITH APPARENT RIGHT LATERAL MOVEMENT. ALTHOUGH NO PEGMATITES WERE MAPPED IN IMMEDIATE AREA (HEDLUND AND OLSON, 1973) HUNTER (1925) DESCRIBED A 2-FT-WIDE DIKE ON WEST BORDER OF STOCK CONSISTING OF QUARTZ, MICROCLINE, AND LONG SLENDER HORNBLENDE CRYSTALS, WITH ABUNDANT SPECULAR HEMATITE. MOLYBDENITE IS ASSOCIATED WITH HORNBLENDE AND OCCURS ALONG CRACKS AND JOINTS IN QUARTZ.
Comment (Location): EXACT LOCATION UNCERTAIN, HUNTER (1925) GIVES LOCATION AS ABOVE STREAM CROSSING ON WILDCAT GULCH ON WEST BORDER OF AUGITE SYENITE BODY. NEW BASE MAP SHOWS WOLF CREEK AND WILDCAT GULCH REVERSED FROM THAT ON HUNTER'S MAP. SYENITE BODY LIES ON WOLF CREEK ABOUT 1.7 MILES EAST OF CONFLUENCE WITH CEBOLLA CREEK. GEOLOGIC MAP SHOWS NO PEGMATITE IN IMMEDIATE AREA. ELEV AND LAT-LONG GIVEN ARE FOR POINT ABOVE (SOUTH OF) TRAIL ACROSS WOLF CREEK AND NEAR CONTACT OF MAIN SYENITE MASS WITH SMALL PERIPHERAL BODY OF MELASYENITE IN SE SW SE SEC. 19. ; INFO FROM LAND.ST :1975
References
Reference (Deposit): HUNTER, J.F., 1925, PRE-CAMBRIAN ROCKS OF GUNNISON RIVER, COLORADO: USGS BULL. 777, P. 79.
Reference (Deposit): HEDLUND, D.C., AND OLSON, J.C., 1973, GEOLOGIC MAP OF THE CARPENTER RIDGE QUADRANGLE, GUNNISON COUNTY, COLORADO: USGS MAP GQ-1070.
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