Columbia Mine Group

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

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.

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.