Granville & Unknown Claims

The Granville & Unknown Claims is a manganese mine located in Cochise county, Arizona at an elevation of 5,299 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: Granville & Unknown Claims

Commodity

Primary: Manganese

Location

State: Arizona
County: Cochise
District: Warren 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: Calumet P Arizona Mng. Co., Phelps Dodge Corp.

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Replacement
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: STRINGERS, BUNCHES, VEINLETS

Structure

Type: R
Description: Pre-Mineralization Faulting And Tilting

Type: L
Description: Main Fault Directions, N10w To N40e, S30w To N50w, Pre-Mineralization

Alterations

Alteration Type: L
Alteration Text: Gossan With Mn And Fe Oxides Induced By Hydrothermal Metamorphism

Rocks

Name: Granite
Role: Associated
Age Type: Associated Rock Unit
Age in Years: 170.500000+-7.500000
Age Young: Jurassic

Name: Granite
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Permian

Analytical Data

Not available

Materials

Gangue: Pyrite
Gangue: Quartz

Comments

Comment (Deposit): APPEARS TO BE REPLACEMENT DEPOSIT. HARD MANGANESE OXIDES AND MANGANIFEROUS CALCITE IN FISSURE ZONE CUTTING LIMESTONE

Comment (Workings): LARGEST OPEN CUT 110 FT LONG, 3 TO 5 FT WIDE, 10 FT DEEP. ANOTHER OPEN CUT WAS 60 FT LONG, 2 TO 3 FT WIDE. NINE OR MORE SHALLOW CUTS AND PITS ARE SCATTERED ALONG SEVERAL FISSURES OCCUPYING AN AREA ABOUT 100 FT WIDE AND 300 FT LONG

Comment (Location): LOCATION OF MINE ESTIMATED FROM LOCATION MAP IN USBM IC 7990 P. 11. THE AREA OF THIS MINE HAS BEEN COVERED BY TAILINGS DUMPS

Comment (Production): SOME 600-700 TONS OF MANGANESE ORE PRODUCED DURING WORLD WAR I.

References

Reference (Deposit): KEITH, S.B., 1973, ARIZONA BUREAU OF MINES BULLETIN 187, P. 87.

Reference (Deposit): FARNHAM, 1961, USBM IC 7990, P. 11-19

Reference (Production): KEITH, 1973, ARIZ. BUR. OF MINES BULL. 187.

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.