Keystone Mine

The Keystone Mine is a gold and copper mine located in Clark county, Nevada at an elevation of 4,800 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: Keystone Mine

Commodity

Primary: Gold
Primary: Copper
Secondary: Silver

Location

State: Nevada
County: Clark
District: Goodsprings

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: Nevada-Keystone Mining Co.
Years: 1906 -

Production

Year: 1947
Time Period: 1902 - 1947
Material type: AU
Description: Cp_Grade: ^.073 Oz/Ton

Deposit

Record Type: Site
Operation Category: Past Producer
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: Sonoran Desert

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Type: R
Description: Large Scale Overthrusts

Type: L
Description: Broad Anticline, Keystone Thrust, Small Underground Faults

Alterations

Not available

Rocks

Name: Granite
Role: Associated
Age Type: Host Rock
Age Young: Late Devonian

Name: Granite
Role: Associated
Age Type: Associated Rock
Age Young: Paleocene

Analytical Data

Analytical Data: FINENESS OF THE GOLD 0.920 TO 0.930, UNCOMMONLY PURE

Materials

Ore: Chrysocolla
Ore: Gold
Ore: Limonite
Ore: Copper

Comments

Comment (Other Database): $600,000

Comment (Production): PRODUCTION PRIOR TO 1902 EST AT $380,000. BETWEEN 1931 - 1941 PRODUCTION INCLUDES ORE FROM BAREFOOT MINE. ORE SHOOTS MOST PRODUCTIVE WHERE VEIN WAS FLATTER THAN AVERAGE.

Comment (Workings): SOME OF THE SHOOTS ON THE UPPER CONTACT HAVE NOT BEEN EXPLORED BELOW THE 300 FOOT LEVEL.

Comment (Deposit): ALSO INCLUDES BAREFOOT MINE AS PART OF THE KEYSTONE GROUP ; INFO.SRC : 1 PUB LIT

Comment (Geology): ORE IS ALONG PORPHYRY/DOLOMITE CONTACT, IN VEINS IN PORPHYRY AND IN THE DOLOMITE AND ALONG FAULTS. GOLD CHEIFLY ASSOCIATED WITH LIMONITE STAINED GREENISH CLAY AND IN THE DARK CHERT.

References

Reference (Deposit): HEWETT, 1931 , GEOLOGY AND ORE DEPOSITS OF GOODSPRINGS QUAD, USGS PROF. PAPER 162 , P. 105 - 107 .

Reference (Deposit): LONGWELL, C. R., PAMPEYAN, E. H., BOWYER, B., ROBERTS, R. J., 1965 , GEOLOGY AND MINERAL DEPOSITS OF CLARK CO. NEV. BUREAU OF MINES, BULL. 62 , P. 191 .

Reference (Deposit): NBMG, 1994, MI-1993

Reference (Production): NBMG MI-1993

Nevada Gold

Nevada has a total of 368 distinct gold districts. Of the of those, just 36 are major producers with production and/or reserves of over 1,000,000 ounces, 49 have production and/or reserves of over 100,000 ounces, with the rest having less than 100,000 ounces. Read more: Gold Districts of Nevada.