The Bell Group is a gold and silver mine located in Boulder county, Colorado at an elevation of 6,401 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: 6,401 Feet (1,951 Meters)
Commodity: Gold, Silver
Lat, Long: 40.0314, -105.33510
Map: View on Google Maps
Satelite View
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Bell Group MRDS details
Site Name
Primary: Bell Group
Commodity
Primary: Gold
Primary: Silver
Tertiary: Uranium
Location
State: Colorado
County: Boulder
District: Gold Hill 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: Past Producer
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
Not available
Structure
Type: R
Description: Front Range Uplift, Boulder Creek Batholith
Type: L
Description: Poorman Fault Zone, Maxwell Fault Zone (Breccia Reef)
Alterations
Alteration Type: L
Alteration Text: Silicification
Rocks
Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Name: Diorite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Neoproterozoic
Name: Diorite
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic
Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic
Analytical Data
Analytical Data: SAMPLES RANGE FROM 0.0006 TO 0.041% U3O8
Materials
Not available
Comments
Comment (Location): WITHIN 0.5 MILE NE OF POORMAN HILL ; INFO FROM LAND.ST :(1976)
Comment (Geology): VEINS OUT FRACTURES IN THE POORMAN FAULT ZONE WHICH IS 20 TO 60 FT WIDE
Comment (Deposit): ALTHOUGH BELL GROUP AND ADJACENT POORMAN GROUP ARE ISOLATED SE OF MAIN PART OF DISTRICT, PRODUCTIVE AU-AG TELLURIDE VEINS WERE FORMED IN STRUCTURALLY FAVORABLE FISSURES ON SW SIDE OF INTERSECTION OF POORMAN REEF (TRENDING GENERALLY N 80 TO 85 W) AND PROMINENT LARAMIDE MAXWELL REEF (TRENDING N 25 W).
References
Reference (Deposit): LOVERING, T.S., AND GODDARD, E.N., 1950, GEOLOGY AND ORE DEPOSITS OF THE FRONT RANGE, COLORADO: USGS PROF. PAPER 223, P. 234-246
Reference (Deposit): COLTON, R.B., 1978, GEOLOGIC MAP OF THE BOULDER-FORT COLLINS-GREELEY AREA, COLORADO: USGS MAP I-855-G
Reference (Deposit): NELSON-MOORE, J.L., COLLINS, D.B., AND HORNBAKER, A.L., 1978, RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BIBLIOGRAPHY: COLORADO GEOLOGICAL SURVEY BULL. 40, P. 81
Colorado Mining Photos
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