Grand Reef Mine

The Grand Reef Mine is a lead and copper mine located in Graham county, Arizona at an elevation of 3,999 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: Grand Reef Mine
Secondary: Klondike Area
Secondary: Includes Grand Reef, Aravaipa, Dogwater, and Silver Cable Claims

Commodity

Primary: Lead
Primary: Copper
Secondary: Zinc
Secondary: Gold
Secondary: Silver
Tertiary: Silica
Tertiary: Molybdenum
Tertiary: Fluorine-Fluorite
Tertiary: Barium-Barite

Location

State: Arizona
County: Graham
District: Aravaipa District

Land Status

Not available

Holdings

Not available

Workings

Type: Underground

Ownership

Owner Name: American Zinc, Lead, And Smelting Co.
Home Office: St. Louis, Mo.
Years: 1950 -

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1915
Discovery Year: 1890
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, Minor Pre-Cretaceous Folding Trending E And Ne

Type: L
Description: Grand Reef Fault (Low Angle Fault)

Alterations

Alteration Type: L
Alteration Text: Silicification

Rocks

Name: Volcanic Rock (Aphanitic)
Role: Associated
Age Type: Associated Rock Unit
Age in Years: 25.000000+-
Age Young: Tertiary

Name: Volcanic Rock (Aphanitic)
Role: Host
Age Type: Associated Rock Unit
Age in Years: 25.000000+-
Age Young: Tertiary

Name: Quartz Monzonite
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic

Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock Unit
Age in Years: 25.000000+-
Age Young: Tertiary

Analytical Data

Analytical Data: ASSAYS (1915-1920) 2.83% CU, 40.9% PB, 1.4% ZN, 0.01 OZ AU/TON, 20 OZ AG/TON, 2.4% FE, 6.4%

Materials

Ore: Wulfenite
Ore: Barite
Ore: Chrysocolla
Ore: Malachite
Ore: Anglesite
Ore: Chalcopyrite
Ore: Sphalerite
Ore: Galena
Ore: Fluorite
Gangue: Quartz

Comments

Comment (Deposit): THIS REPORT REPRESENTS A MERGER OF ORIGINAL RECORD M050152 WITH RECORD M030461 OF JAN WILT IN MOLYBDENUM FILE. DUPLICATE RECORDS D000318 OF ROBERT U. KING AND D002877 OF J. WILLIAM HAVE ALSO BEEN COMBINED IN THIS RECORD; CONTACT PERSON T.G. THEODORE, USGS. ; INFO.SRC : 1 PUB LIT

Comment (Location): IN SANTA TERESA MOUNTAINS.

Comment (Deposit): BELOW ADIT LEVEL ORE BODY WAS 40-50 FT LONG, 10-15 FT WIDE. LEAD AND ZINC SULFIDES AND OXIDES OCCUR IN FISSURE VEINS AND REPLACEMENT BODIES IN INTENSIVE RHYOLITE AND BRECCIATED LIMESTONE. THE VEINS ARE IN LOW ANGLE FAULT ZONES.

Comment (Workings): BETWEEN 1890-1900 MINE OPENED TO DEPTH OF 300 FT. HAULAGE LEVEL I N 1950 WAS ADIT 1400 FT LONG AND WINZE EXTENDED 300 FT BELOW ADIT WITH 3 LEVELS OF DRIFTS AT 100 FT INTERVALS

Comment (Production): PRODUCTION YEARS 1907-1908, 1915-1920, 1929-1931. RANKED AS SECOND PRODUCER OF LEAD IN 1931.

References

Reference (Deposit): SIMONS, 1964, USGS PP 461, 173 P.

Reference (Deposit): ROSS, 1925, USGS BULL 763, 120 P.

Reference (Deposit): DENTON, 1947, USBM RI 4007.

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

Reference (Deposit): PEIRCE, H.W., 1990, ARIZONA GEOLOGICAL SURVEY INDUSTRIAL MINERAL CARD FILES.

Reference (Deposit): VAN ALSTINE, R.E., AND MOORE, R.T., 1969, FLUORSPAR, IN ABM BULLETIN 180, USGS BULLETIN 871, P. 352.

Reference (Deposit): MINERALS AVAILABILITY SYSTEM: ARIZONA FLUORSPAR, ARIZONA DMR, MARCH 1976.

Reference (Deposit): PHILLIPS, K.A., 1987, ARIZONA INDUSTRIAL MINERALS: ARIZONA DEPARTMENT OF MINES AND MINERAL RESOURCES MINERAL REPORT 4, 185 P.

Reference (Other Database): CIMRI

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.