The Commonwealth Extension Mine is a gold and silver mine located in Cochise county, Arizona at an elevation of 4,400 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: 4,400 Feet (1,341 Meters)
Commodity: Gold, Silver
Lat, Long: 31.90306, -109.80750
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.
Commonwealth Extension Mine MRDS details
Site Name
Primary: Commonwealth Extension Mine
Commodity
Primary: Gold
Primary: Silver
Secondary: Copper
Location
State: Arizona
County: Cochise
District: Pearce 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
Owner Name: Commonwealth Extension Mining Co
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Mexican Highland
Mineral Deposit Model
Not available
Orebody
Form: VEINS
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Silicification
Rocks
Name: Rhyolite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene
Name: Rhyolite
Role: Associated
Age Type: Host Rock
Age Young: Pliocene
Analytical Data
Not available
Materials
Not available
Comments
Comment (Deposit): SEE COMMONWEALTH FINE FOR MAJOR PRODUCER ADJOINING COMMONWEALTH EXTENSION ; INFO.SRC : 1 PUB LIT
Comment (Production): PRODUCTION INCLUDED UNDER COMMONWEALTH IN ABGMT-USBM FILES
Comment (Deposit): SPOTTY OXIDIZED SILVER-GOLD MINERALIZATION IN FISSURE VEINS AND NARROW REPLACEMENT BODIES IN ALTERED ANDESITE AND RHYOLITE BRECCIA.
Comment (Workings): SHAFT WORKINGS CONNECTED TO AND EAST OF COMMONWEALTH MINE, SEE COMMONWEALTH FOR COMPLETE DESCRIPTION
References
Reference (Deposit): KEITH, S.B., 1973, ARIZONA BUREAU OF MINES BULLETIN 187, P. 69.
Reference (Deposit): SAWYER, M.B., GURMENDI, A.C., DALEY, M.R., AND HOWELL, S.B., 1992, PRINCIPAL DEPOSITS OF STRATEGIC AND CRITICAL MINERALS IN ARIZONA: UNITED STATS BUREAU OF MINES SPECIAL PUBLICATION, 334 P.
Reference (Other Database): CIMRI
Reference (Production): KEITH, 1973.
Arizona Gold
"Where to Find Gold in Arizona" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Arizona. Read more: Where to Find Gold in Arizona.
