The Unidentified Occurrence is a feldspar mine located in Fremont county, Colorado at an elevation of 6,001 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: 6,001 Feet (1,829 Meters)
Commodity: Feldspar
Lat, Long: 38.40833, -105.28333
Map: View on Google Maps
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.
Unidentified Occurrence MRDS details
Site Name
Primary: Unidentified Occurrence
Commodity
Primary: Feldspar
Secondary: Mica
Secondary: Quartz
Tertiary: Uranium
Location
State: Colorado
County: Fremont
District: Grape 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: Past Producer
Operation Type: Unknown
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Interior Plains
Physiographic Province: Great Plains Province
Physiographic Section: Colorado Piedmont
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Type: R
Description: Southern Colorado Front Range, Canon City Embayment, Royal Gorge "Anticline"
Type: L
Description: Ene-Trending Faults
Alterations
Alteration Type: L
Alteration Text: Slight Wallrock Silicification
Rocks
Name: Quartzite
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic
Name: Quartzite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Neoproterozoic
Name: Quartzite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Name: Quartzite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic
Analytical Data
Analytical Data: RADIOACTIVITY TO 3 TIMES BACKGROUND
Materials
Ore: Microcline
Ore: Muscovite
Gangue: Biotite
Gangue: Feldspar
Unknown: Quartz
Comments
Comment (Location): LOCATED NEAR THE BOTTOM OF GRAPE CREEK GULCH ; INFO FROM LAND.ST :(1976)
Comment (Development): MINING WAS CONDUCTED, BUT PROBABLY FOR FELDSPAR OR MICA RATHER THAN FOR URANIUM
Comment (Deposit): URANIUM IN FRACTURES
References
Reference (Deposit): NELSON-MOORE, J.L., COLLINS, D.B. AND HORNBAKER, A.L., 1978, RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BIBLIOGRAPHY: CGS BULLETIN 40, P. 153
Reference (Deposit): TAYLOR, R.B., SCOTT, G.R., WOBUS, R.A. AND EPIS, R.C., 1975, RECONNAISSANCE GEOLOGIC MAP OF THE ROYAL GORGE QUADRANGLE, FREMONT AND CUSTER COUNTIES, COLORADO: USGS MAP I-869, 1:62,500.
Colorado Mining Photos
Check out this collection of Colorado's best historic mining photos: Incredible Photos of Colorado Mining Scenes.
