Keystone Mine

The Keystone Mine is a copper and zinc mine located in Cochise county, Arizona at an elevation of 4,879 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
Secondary: Hagerman Mine
Secondary: Ok Mine
Secondary: Bannon Group Which Includes Claims: Mary
Secondary: Calumet
Secondary: Ultimo
Secondary: Charles
Secondary: Nevertheless
Secondary: O.K.
Secondary: Ella
Secondary: Gustave
Secondary: Wolfrime
Secondary: Louie
Secondary: Ernest
Secondary: Erika
Secondary: Roswell
Secondary: Hagerman
Secondary: Dora
Secondary: Ina
Secondary: Esmeralda
Secondary: Halderman
Secondary: Gladys
Secondary: Maher

Commodity

Primary: Copper
Primary: Zinc
Secondary: Gold
Secondary: Molybdenum
Secondary: Lead
Secondary: Tungsten
Secondary: Silver

Location

State: Arizona
County: Cochise
District: Cochise 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

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1915
Year Last Production: 1958
Discovery Year: 1908
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, CHIMNEYS, MANTOS

Structure

Type: R
Description: Nw Tert Block Faulting, Lcret Or Etert N & Nw Trending Folds And Thrust Faulting

Type: L
Description: N63e Normal Fault Dips 36se; Keystone Fault With A Horizontal Displacement Of About 1200 Ft

Alterations

Alteration Type: L
Alteration Text: Limestone Is Metamorphosed To Tactite Characterized By Diopside, Tremolite, K-Feldspar, Quartz

Rocks

Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock Unit
Age in Years: 53.000000+-
Age Young: Tertiary

Analytical Data

Analytical Data: 0.6-1.2% CU, 1 FT BED 4.1% MO, 7 FT OF 1.02% MO

Materials

Ore: Gold
Ore: Sphalerite
Ore: Bornite
Ore: Pyrite
Ore: Scheelite
Ore: Silver
Ore: Chalcopyrite
Ore: Molybdenite
Gangue: Garnet

Comments

Comment (Location): 1.1 KM SW OF REPUBLIC MINE ; INFO FROM LAND.ST :(1979)

Comment (Commodity): MOST ORE CAME FROM UPPER LEVELS IN MARTIN & ESCABROSA FORMATIONS. ABRIGO FORMATION MINERALIZED SPORADICALLY IN VICINITY OF INFERRED FAULT. MOLYBDENITE OCCURS IN ABRIGO. DRILLING INDICATES 0.9 FT OF 4.1% MO AND 7.3 FT OF 1.02% MO.

Comment (Development): 16 CLAIMS. OPERATORS INCLUDED STRONG & MOSELEY, BLACK PRINCE CO.

Comment (Deposit): ORE OCCURS ALONG THE PLANE OF THE BEDS AND ORE BODIES HAVE THEIR LONG AXIS PARALLEL TO THE DIP OF THE BEDS

Comment (Workings): DRILLING BY USBM; VERTICAL SHAFT 650 FT, LEVELS AT 60, 200, 325, 487, & 565 FT BELOW SURFACE. MAIN PERPENDICULAR HAGERMAN SHAFT CONSISTS OF TWO COMPARTMENTS, BEGINNING AT THE THIRD LEVEL, STATIONS AND ORE POCKETS HAVE BEEN CUT 100 FT APART. THE OK SHAFT IS AN INCLINE WITH AN AVERAGE INCLINATION OF 34 DEG AND MEASURES 385 FT FROM COLLAR TO BOTTOM. THERE ARE SEVERAL OTHER VERTICAL AND INCLINED SHAFTS TENS OF FT DEEP WITH NUMEROUS PITS AND SMALL OPEN STOPES. LENGTH OF WORKINGS IS ESTIMATED.

Comment (Deposit): THIS REPORT REPRESENTS A MERGER OF ORIGINAL RECORD M050006 WITH RECORD M030573 OF JAN WILT IN MOLYBDENUM FILE, CONTACT PERSON T.G. THEODORE, USGS. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

References

Reference (Deposit): COOPER & SILVER, 1964, USGS PP 416.

Reference (Deposit): COOPER, 1950, ABM BULL 156.

Reference (Deposit): ROMSLO, 1949, USBM RI 4504.

Reference (Deposit): KEITH, 1973, ABM BULL 187.

Reference (Deposit): ABGMT CLIPPINGS FILE.

Reference (Deposit): LIVINGSTON ET AL, 1967, JGR, V. 72, P. 1361-1375.

Reference (Deposit): SAWYER, M.B., GURMENDI, A.C., DALEY, M.R., AND HOWELL, S.B., 1992, PRINCIPAL DEPOSITS OF STRATEGIC AND CRITICAL MINERALS IN ARIZONA: U.S. BUREAU OF MINES SPECIAL PUBLICATION, 334 P.

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.