The Mrs. Roberts Deeded Land is a thorium mine located in Gunnison county, Colorado at an elevation of 9,091 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: 9,091 Feet (2,771 Meters)
Commodity: Thorium
Lat, Long: 38.33389, -107.08000
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.
Mrs. Roberts Deeded Land MRDS details
Site Name
Primary: Mrs. Roberts Deeded Land
Commodity
Primary: Thorium
Tertiary: Lead
Tertiary: Copper
Tertiary: Zinc
Tertiary: REE
Location
State: Colorado
County: Gunnison
District: Goose Creek District
Land Status
Land ownership: Private
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
Deposit Type: Vein
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
Form: TABULAR
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: Schist
Role: Host
Age Type: Associated Rock
Age Young: Neoproterozoic
Name: Schist
Role: Host
Age Type: Host Rock Unit
Age Young: Neoproterozoic
Name: Schist
Role: Host
Age Type: Host Rock
Age Young: Neoproterozoic
Name: Schist
Role: Host
Age Type: Associated Rock Unit
Age Young: Neoproterozoic
Analytical Data
Analytical Data: SAMPLE F-35068, 0.17% EQUIV U308, 0.012% U308, 0.74% EQUIV THO2.
Analytical Data: SAMPLE F-35067, 0.087% EQUIV U308, 0.078% U308, 0.046% EQUIV THO2
Analytical Data: SAMPLE F-35066, 0.097% EQUIV U308, 0.056% U308, 0.20% EQUIV THO2
Analytical Data: 4.77% THO2
Analytical Data: SAMPLE F-35065, 1.11% EQUIV U308, 0.002% U308, 5.35% EQUIV THO2
Analytical Data: SAMPLE F-35064, 0.19% EQUIV U308, 0.28% U308
Analytical Data: BACKGROUND RADIATION 0.01 TO 0.02 MR/HR. SIX SAMPLES GAVE COUNTS OF 0.6 TO 2.0 MR/HR. ANALYSES: SAMPLE F-35063, 0.072% EQUIV U308, 0.048% U308, 0.11% EQUIV THO2
Materials
Ore: Thorite
Gangue: Specularite
Gangue: Barite
Gangue: Calcite
Gangue: Apatite
Gangue: Jasper
Gangue: Quartz
Gangue: Rutile
Gangue: Chalcopyrite
Gangue: Sphalerite
Gangue: Galena
Gangue: Pyrite
Gangue: Magnetite
Gangue: Goethite
Gangue: Hematite
Gangue: Fluorite
Comments
Comment (Commodity): BASE METALS AND RARE EARTHS LISTED ABOVE ARE GENERAL OCCURRENCES REPORTED FOR TH VEINS IN AREA; ALL MAY NOT NECESSARILY OCCUR AT THIS SITE.
Comment (Location): EAST OF AND NEAR HEAD OF WOLF CREEK. ; INFO FROM LAND.ST :1976
Comment (Deposit): THORIUM VEINS 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. FOLIATION OF DUBOIS GREENSTONE COUNTRY ROCK TRENDS GENERALLY N 85 TO 90 E, 85 NE. MALAN'S DESCRIPTION GIVES TREND OF SHEAR ZONE AS N 72 E, BUT GEOLOGIC MAP SHOWS VEIN TREND OF N 63 E.
Comment (Workings): FIVE SURFACE PROSPECT PITS; TRENCHES
Comment (Geology): OTHER MINERALS LISTED ABOVE ARE GENERAL OCCURRENCES REPORTED FOR TH VEINS IN AREA; ALL MAY NOT NECESSARILY OCCUR AT THIS SITE.
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): 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.
Reference (Deposit): OLSON, J.C., AND HEDLUND, D.C., 1981, ALKALIC ROCKS AND RESOURCES OF THORIUM AND ASSOCIATED ELEMENTS IN THE POWDERHORN DISTRICT, GUNNISON COUNTY, COLORADO: USGS PROF. PAPER 1049-C.
Reference (Deposit): NELSON-MOORE, J.L., AND OTHERS, 1978, RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BIBLIOGRAPHY: CGS BULL. 40, P. 175.
Reference (Deposit): MALAN, R.C., 1955, AEC PRELIM. RECO. REPT. DEB-P-3-1752.
Colorado Mining Photos
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