Copperstone

The Copperstone is a gold mine located in La Paz county, Arizona at an elevation of 886 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: Copperstone
Secondary: Copperstone Underground
Secondary: Continental Silver Claim Group
Secondary: Copperstone Open Pit

Commodity

Primary: Gold
Tertiary: Silver

Location

State: Arizona
County: La Paz
District: La Paz 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

Type: Located Claim
Type: Private Lease

Workings

Not available

Ownership

Owner Name: Morrison-Knudson Co. (31 Month Contract-Jun.'87-Dec.'89)
Company ID: 202364
Home Office: Idaho
Info Year: 1988
Years: 1987 - 1988

Owner Name: Dan Patch (Retains Royalty Right From Production)
Company ID: 202364
Percent: 100.0
Info Year: 1988

Owner Name: Cyprus Minerals Co. (Working Interest From Owner)
Company ID: 202364
Home Office: Colorado
Info Year: 1988
Years: 1987 - 1995

Production

Year: 1992
Description: Economic Ore Depleted, Dec 1992.
Year: 1987
Description: 93.31 Kgs Au Produced 66000 Mt Ore Mined
Year: 1988
Description: 1,953.1 Kgs Au Produced 822000 Mt Ore Mined Dore 97% Au
Year: 1989
Description: 2,270.6 Kgs Au Produced 797000 Mt Ore Mined
Year: 1990
Description: 3,328.1 Kgs Au Produced 1130000 Mt Ore Mined
Year: 1991
Description: 3,474.3 Kgs Au Produced 1351000 Mt Ore Mined
Year: 1992
Description: 3,614.2 Kgs Au Produced 1905000 Mt Ore Mned

Deposit

Record Type: Site
Operation Category: Plant
Plant Type: Leach
Plant Subtype: Hydromet
Operation Type: Surface
Mining Method: Open Stope
Milling Method: Hydrometallurgy Unspecified
Year First Production: 1987
Discovery Year: 1979
Years of Production:
Organization:
Significant: Y
Deposit Size: M

Physiography

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Sonoran Desert

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Unknown: Quartz
Unknown: Gold
Unknown: Pyrolusite
Unknown: Plagioclase
Unknown: Magnetite
Unknown: Kaolinite
Unknown: Hematite
Unknown: Goethite
Unknown: Fluorite
Unknown: Feldspar
Unknown: Chrysocolla
Unknown: Chlorite
Unknown: Barite
Unknown: Amethyst
Unknown: Silver
Unknown: Sericite

Comments

Comment (Deposit): FORMER OPEN PIT MINE; PRODUCED APPROXIMATELY 500,000 OZ GOLD FROM 1987 TO 1992. 284 GOLD LODE CLAIMS HELD BY CYPRUS CORP UNDER A LONG TERM LEASE. ECONOMIC GOLD ORE DEPLETED DECEMBER, 1992; PLANT WILL TREAT LOW GRADE STOCKPILED ORE UNTIL APRIL 1993.

Comment (Workings): POND NO. 1 = 18 ACRES; POND NO. 2 = 43 ACRES.

References

Reference (Deposit): ENGLEWOOD, CO. NOVEMBER 18, 1987, 3 PP.

Reference (Deposit): CYPRUS MINERALS CO., 1992 SEC, FORM 10-K REPORT, P10.

Reference (Deposit): CYPRUS AMAX MINERALS COMPANY, 1993 SEC, FORM 10-K REPORT,

Reference (Deposit): P14.

Reference (Deposit): HAGMAN, RICHARD H. (MANAGER; PUBLIC, GOVERNMENT AND INVESTOR

Reference (Deposit): ENGLEWOOD, CO. JULY 28, 1988, 5 PP.

Reference (Deposit): CYPRUS MINERALS COMPANY, 1988 S.E.C., FORM 10-K REPORT, P 4.

Reference (Deposit): CYPRUS MINERALS CO., 1990 SEC, FORM 10-K REPORT, PP. 2, 4-5.

Reference (Deposit): CYPRUS MINERALS CO., 1991 SEC, FORM 10-K REPORT, P7.

Reference (Deposit): ROUNDS, MIKE (ADVISOR; PUBLIC, GOVERNMENT AND INVESTOR

Reference (Deposit): RELATIONS WITH CYPRUS MINERALS COMPANY). NEWS RELEASE.

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.