Cobre Grande Mine.

The Cobre Grande Mine. is a copper and lead mine located in Graham county, Arizona at an elevation of 6,601 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: Cobre Grande Mine.

Commodity

Primary: Copper
Primary: Lead
Tertiary: Iron
Tertiary: Silver

Location

State: Arizona
County: Graham
District: Aravaipa District

Land Status

Land ownership: National Forest
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: Snell, Elliot, Fisk, And Alderman
Home Office: Globe, AZ
Years: 1920 -

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1916
Year Last Production: 1957
Discovery Year: 1905
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: Mexican Highland

Mineral Deposit Model

Not available

Orebody

Form: TABULAR

Structure

Type: R
Description: Block Faulting Trending Nnw. ; Reg.Trends: Minor Pre-Cretaceous E And Ne Trending Folds And Major Post-Cretaceous Nnw Trending Faults.

Type: L
Description: Faults.

Alterations

Alteration Type: L
Alteration Text: Oxidation Of Minerals,Silicification.

Rocks

Name: Diorite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Cretaceous

Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene

Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Pennsylvanian

Analytical Data

Not available

Materials

Ore: Tenorite
Ore: Chalcanthite
Ore: Chalcopyrite
Gangue: Epidote
Gangue: Chlorite
Gangue: Quartz
Gangue: Pyrite
Gangue: Garnet
Gangue: Specularite
Gangue: Calcite
Unknown: Magnetite

Comments

Comment (Development): PAST OPERATORS INCLUDE COBRE GRANDE CO., JULIUS RISER, AND DUVAL SULPHUR AND POTASH CO.

Comment (Geology): GEOL.DESC: LIMESTONE REPLACED IN ZONES BOTH ACROSS AND PARALLEL TO BEDDING. SILICIC DIKES INTRUDE AREA. ENTIRE AREA IS CLOSELY FAULTED, HIGHLY ALTERED. RELATIONSHIPS OBSCURE.

Comment (Deposit): SEVERAL ZONES OF MINERALIZATION OCCUR. MORE THAN ONE VEIN.

Comment (Workings): ONE ADIT 700 FT. LONG (COWBOY TUNNEL.) RAISES, WINZES UP TO 30 FT. LONG.

References

Reference (Deposit): USGS PP 461

Reference (Deposit): USGS BULL 763

Reference (Deposit): USBM-ABGMT FILE DATA

Reference (Deposit): 1925 GEOLMAP ROSS, C.P. BULL. 763.

Reference (Deposit): 1958 DIREXPL DUVAL SULPHUR AND POTASH CO. BULLDOZING.

Reference (Deposit): 1964 GEOLMAP SIMONS, F.S. PROF. PAPER 461.

Reference (Production): ROSS, 1925.

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.