The Penn Group is a gold, copper, and iron mine located in Lake county, Colorado.
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
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Penn Group MRDS details
Site Name
Primary: Penn Group
Secondary: includes Penn No. 1, 2, 3, Old Breece Iron, Ballard, Big Six, Little Prince, Nettie Morgan, Presiden
Commodity
Primary: Gold
Primary: Copper
Primary: Iron
Location
State: Colorado
County: Lake
District: Leadville District
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Model Name: Polymetallic replacement
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Chalcocite
Ore: Gold
Ore: Hematite
Ore: Magnetite
Ore: Pyrite
Gangue: Serpentine
Comments
Comment (Reserve-Resource): Several exploration targets are outlined. (Sunshine files, 1993)
Comment (Reserve-Resource): 35,000 tons of dump material grade 0.16 oz/ton Au and 2.1 oz/ton Ag. (Sunshine files)
Comment (Geology): Massive replacement deposits of magnetite-specularite and a copper-gold-bearing vein are also present.
Comment (Location): On the NW side of Breece Hill, about 2 miles east of Leadville, in S/2 sec 20, T 9 S, R 79 W.
Comment (Production): About 300,000 tons of iron ore (mostly hematite) was shipped as flux for nonferrous smelters or to iron-ore smelters.
References
Reference (Deposit): Harrer, C.M., and Tesch, W.J., Jr., 1959, Reconnaissance of iron occurrences in Colorado, U.S. Bureau of Mines Information circular 7918, 82 p.
Reference (Deposit): Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.
Reference (Deposit): Emmons, S. F., Irving, J. D., and Loughlin, G. F., 1927, Geology and ore deposits of the Leadville mining district, Colorado: U.S. Geological Survey Professional Paper 148, 368 p.
Colorado Mining Photos
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