The Sunset Claims is a thorium mine located in Gunnison county, Colorado at an elevation of 9,029 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: 9,029 Feet (2,752 Meters)
Commodity: Thorium
Lat, Long: 38.34, -107.01417
Map: View on Google Maps
Satelite View
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Sunset Claims MRDS details
Site Name
Primary: Sunset Claims
Commodity
Primary: Thorium
Tertiary: Gold
Location
State: Colorado
County: Gunnison
District: Domingo (Vulcan) District
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, Iron Hill Alkalic Complex, Tolvar Peak Stock
Alterations
Not available
Rocks
Name: Trachyte
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic
Name: Trachyte
Role: Associated
Age Type: Associated Rock
Age Young: Late Cambrian
Analytical Data
Not available
Materials
Ore: Thorite
Ore: Pyrite
Gangue: Orthoclase
Gangue: Hematite
Comments
Comment (Location): ALTHOUGH EXACT LOCATION IS UNCERTAIN, CLAIMS LIE NEAR MAIN PART OF DOMINGO DISTRICT. ELEV AND LAT-LONG GIVEN ARE FOR PROSPECTS ON TRACHYTE DIKE IN W2 SW SEC. 07. ; INFO FROM LAND.ST :1976
Comment (Deposit): EXACT LOCATION AND GEOLOGY OF DEPOSIT ARE UNKNOWN, BUT ON BASIS OF ASSUMED LOCATION, DEPOSIT COULD BE TRACHYTE DIKE TRENDING N 63 W AND CUTTING APOPHYSIS OF TOLVAR PEAK GRANITE THAT HAS INTRUDED OLDER DUBOIS GREENSTONE ALONG ITS GENERAL FOLIATION TREND OF EAST-WEST. TRACHYTE DIKES IN THIS AREA ARE ONE OF FOUR ENVIRONMENTS OF TH OCCURRENCE KNOWN IN POWDERHORN-IRON HILL AREA AND ARE PROBABLY RELATED TO EMPLACEMENT OF LATE PRECAMBRIAN SYENITES NORTH AND WEST OF IRON HILL AND OF YOUNGER LATE PRECAMBRIAN OR CAMBRIAN CARBONATITES AT IRON HILL. DIKES FOLLOW LOCAL JOINTING IN COUNTRY ROCK AND ARE COMPOSED OF LATH-SHAPED ORTHOCLASE PHENOCRYSTS IN TRACHYTIC, APHANITIC GROUNDMASS OF ORTHOCLASE MICROLITES. RADIOACTIVITY IS CONCENTRATED IN HEMATITE PSEUDOMORPHS AFTER PYRITE.
Comment (Workings): SURFACE PROSPECTS
References
Reference (Deposit): HEDLUND, D.C., AND OLSON, J.C., 1975, GEOLOGIC MAP OF THE POWDERHORN QUADRANGLE, GUNNISON AND SAGUACHE COUNTIES, COLORADO: USGS MAP GQ-1178.
Reference (Deposit): NELSON-MOORE, J.L., AND OTHERS, 1978, RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BIBLIOGRAPHY: CGS BULL. 40, P. 176.
Reference (Deposit): HEDLUND, D.C., AND OLSON, J.C., 1961, FOUR ENVIRONMENTS OF THORIUM-, NIOBIUM-, AND RARE-EARTH-BEARING MINERALS IN THE POWDERHORN DISTRICT OF SOUTHWESTERN COLORADO: USGS PROF. PAPER 424-B, P. B283-B286.
Colorado Mining Photos
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