The Columbia Mine Group is a lead, silver, and gold mine located in Santa Cruz county, Arizona at an elevation of 3,999 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: 3,999 Feet (1,219 Meters)
Commodity: Lead, Silver, Gold
Lat, Long: 31.40306, -110.92528
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.
Columbia Mine Group MRDS details
Site Name
Primary: Columbia Mine Group
Secondary: Silent Friend
Secondary: Tumacacori
Commodity
Primary: Lead
Primary: Silver
Primary: Gold
Secondary: Copper
Location
State: Arizona
County: Santa Cruz
District: Nogales 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
Type: Underground
Ownership
Owner Name: Farmer, H. J.
Years: 1939 -
Production
Not available
Deposit
Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Year First Production: 1928
Year Last Production: 1941
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Sonoran Desert
Mineral Deposit Model
Not available
Orebody
Form: TABULAR
Form: TABULAR
Structure
Type: R
Description: Numerous N-W Trending Aplite Dikes; Major Fault Trending N-S.
Alterations
Alteration Type: L
Alteration Text: Minor
Rocks
Name: Quartz Monzonite
Role: Host
Age Type: Host Rock
Age in Years: 160.000000+-7.000000
Age Young: Jurassic
Analytical Data
Analytical Data: 100 TONS OF ORE AVERAGING ABOUT 5% PB, 5OZ/TON AG, .5 OZ/TON AU, .5% CU
Materials
Ore: Pyrite
Ore: Chalcopyrite
Ore: Anglesite
Ore: Galena
Gangue: Quartz
Comments
Comment (Location): ON THE NW SLOPE OF MT. BENEDICT; ABOUT 1 MILE W OF LION MINE ; INFO FROM LAND.ST :(1979)
Comment (Development): OTHER PAST OPERATORS INCLUDE: T. RAWSON, DAVID WOLFEN, E.R. THURMAN G UNPATENTED CLAIMS: LAST CHANCE, SILENT FRIEND, TEXAS STEER, GOLDEN REEF, FAIRVIEW AND QUEEN BEE.
Comment (Deposit): BANDED QUARTZ AND MINERALIZED ROCK; DEPOSITS OCCUR IN TWO E-W VEINS ABOUT 250 FT APART; VEINS CONSISTS OF MASSIVE QUARTZ, CRUSHED, SHEARED, ALTERED QUARTZ MONZONITE AND DARK INTRUSIVE DIORITE.
Comment (Workings): NUMEROUS SHAFTS AT VARIOUS DEPTHS (3,10,15 AND 50). ONE 360-FT TUNNEL WITH A 60-FT DRIFT TO THE WEST AND A 18-FT DRIFT TO THE EAST.
References
Reference (Deposit): USBM-ABGMT PRODUCTION FILE DATA
Reference (Deposit): USBM FILE DATA-CLUSTER #30-COLUMBIA MINE GROUP
Reference (Deposit): ADMR FILE DATA-COLUMBIA (SILENT FRIEND) FILE
Reference (Deposit): USGS BULL 582, P. 352-353
Reference (Deposit): USGS MAP I-762
Reference (Deposit): ARIZ BUR MINES BULL 191, P.60
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.
