The Unnamed Gold Occurrence is a mine located in Douglas county, Colorado at an elevation of 6,152 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: 6,152 Feet (1,875 Meters)
Commodity:
Lat, Long: 39.37194, -104.74833
Map: View on Google Maps
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Unnamed Gold Occurrence MRDS details
Site Name
Primary: Unnamed Gold Occurrence
Commodity
Tertiary: Gold
Tertiary: Silver
Location
State: Colorado
County: Douglas
District: Castle Rock Area
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: Placer
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: Denver Basin
Type: L
Description: Denver Basin
Alterations
Alteration Type: L
Alteration Text: Denver Basin
Rocks
Name: Gravel
Role: Host
Age Type: Host Rock
Age Young: Holocene
Analytical Data
Analytical Data: 0.150, 0.0
Analytical Data: 0.237, 1.3, 0 TO 22.4
Analytical Data: EACH SET OF VALUES IS AU GRAIN SIZE (MM), WT % AG IN GRAIN CENTER, RANGE OF WT % AG IN GRAIN RIM: 0.107, LT 0.1, LT 0.1
Analytical Data: AU-AG ANALYSIS FROM DESBOROUGH AND OTHERS (1970, LOCALITY 6)
Analytical Data: 0.237, 1.5, 0 TO 0.7
Analytical Data: 0.212, 0.8, 0.2 TO 9.2
Analytical Data: 0.262, LT 0.1, 0 TO 0.3. SECOND SET OF VALUES REPRESENT SILVER-RICH AMALGAMATED GRAINS HEATED TO 600 C TO REMOVE AMALGAMATED HG. AG VALUES REPRESENT ONE ANALYSIS AT GRAIN CENTER AND RANGE OF FOUR VALUES ON GRAIN RIM: 0.112, 1.9, 0 TO 0.4
Materials
Ore: Silver
Ore: Gold
Comments
Comment (Location): ON RUSSELLVILLE GULCH AT COLO. 83 1.3 MILES SSE OF FRANKTOWN ; INFO FROM LAND.ST :(1974)
Comment (Geology): PROBABLE SOURCE OF GOLD IS CASTLE ROCK CONGLOMERATE (LOWER OLIGOCENE)
References
Reference (Deposit): DESBOROUGH, G.A., AND OTHERS, 1970, PLACER GOLD OF UNIQUE FINENESS IN DOUGLAS AND ELBERT COUNTIES, COLORADO: USGS PROF. PAPER 700-D, P. D134-D139.
Reference (Deposit): TRIMBLE, D.E., AND MACHETTE, M.N., 1979, GEOLOGIC MAP OF THE COLORADO SPRINGS-CASTLE ROCK AREA, FRONT RANGE URBAN CORRIDOR, COLORADO: USGS MAP 1-857-F.
Colorado Mining Photos
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