The Lone Star is a copper mine located in Graham county, Arizona at an elevation of 5,000 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
Elevation: 5,000 Feet (1,524 Meters)
Commodity: Copper
Lat, Long: 32.93085, -109.62307
Map: View on Google Maps
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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.
Lone Star MRDS details
Site Name
Primary: Lone Star
Secondary: Safford Kennecott
Commodity
Primary: Copper
Location
State: Arizona
County: Graham
District: Lone Star 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: Patented
Type: Fee Ownership
Workings
Type: Surface
Ownership
Owner Name: Freeport-McMoran Copper and Gold Inc.
Home Office: Phoenix, AZ 85004
Info Year: 2007
Years: 2007 -
Owner Name: Phelps Dodge Corp. 2600 N Central Ave, Phoenix, Az 85004
Percent: 100.0
Home Office: Arizona
Info Year: 1990
Production
Not available
Deposit
Record Type: Deposit
Operation Category: Past Producer
Deposit Type: Porphyry Cu-Au
Operation Type: Leach
Mining Method: In Situ Leach
Milling Method: Leach-Solvent-Extract-Precipitation
Discovery Year: 1950
Years of Production:
Organization:
Significant: Y
Physiography
General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Mexican Highland
Mineral Deposit Model
Model Name: Porphyry Cu-Au
Orebody
Not available
Structure
Type: R
Structure: NW striking Butte Fault
Type: L
Structure: Lone Star Shear Zone 6000 Ft Wide And 16,000 Ft Long, Strikes N50- 65e
Alterations
Alteration Type: L
Alteration: Pyritization
Alteration Type: L
Alteration: Hypogene Alteration and Supergene Enrichment
Rocks
Name: Quartz Diorite
Role: Associated
Description: Mainly quartz diorite with minor granodiorite and quartz monzonite
Age Type: Associated Rock
Age Young: Early Paleocene
Age Old: Late Cretaceous
Name: Quartz Diorite
Role: Host
Description: Dike swarms
Age Type: Host Rock
Age Young: Eocene
Name: Dacite
Role: Host
Description: Dike swarms
Age Type: Host Rock
Age Young: Eocene
Name: Quartz Latite
Role: Host
Description: Dike swarms
Age Type: Host Rock
Age Young: Eocene
Name: Rhyolite
Role: Host
Description: Dike swarms
Age Type: Host Rock
Age Young: Eocene
Name: Andesite
Role: Host
Description: metamorphosed hornblende and pyroxene andesite flows, breccias, agglomerates, wackes and mud flows with some dacites, dacite tuffs and latites
Age Type: Host Rock Unit
Age Young: Paleocene
Age Old: Cretaceous
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Ore: Pyrite
Ore: Molybdenite
Ore: Bornite
Ore: Sphalerite
Ore: Tetrahedrite
Ore: Galena
Unknown: Cuprite
Unknown: Brochantite
Unknown: Malachite
Unknown: Chrysocolla
Comments
Comment (Production): THE PERCENT RECOVERY IN THE YIELD DATA SET IS AN OVERALL RECOVERY OF 90%(SX) X 99%(EW).
Comment (Deposit): KENNECOTT SHUT DOWN PILOT PLANT STUDIES IN JUNE, 1978 DUE TO POOR PENETRATION AND RECOVERIES FROM LEACHING SOLUTIONS. THE PROJECT WAS COSTED BASED ON A SULFURIC ACID IN-SITU LEACH SOLVENT EXTRACTION AND ELECTROWINNING COMPLEX. RECOVERY ORE TO SOLUTION=30% PROPERTY UPDATED JULY 1987.
Comment (Reserve-Resource): COMPANY NAME CHANGED FROM KENNECOTT MINERALS CO. TO BP MINERALS AMERICA. SOLD TO PHELPS DODGE CORP. IN 1988. ALSO KNOWN AS SAFFORD KENNECOTT. RESERVE FROM PHELPS DODGE SEC FM-10K RPT. 12/31/94. P10. (COPPER GRADE REPORTED AS ACID-SOLUBLE)
Comment (Reserve-Resource): WORLD MINING, SEPT 1977 P. 110. THE TONNAGE IN MATRIX 1 INCLUDES SULPHIDE AND OXIDE ORE. THE OXIDE ORE IS ASSUMED TO LAST THE LIFE OF THE PROPERTY.
Comment (Identification): *****SEE ASSOCIATED DEPOSIT-Dos Pobres Mine- Deposit ID 10096999
Comment (Production): Production restarted at Safford in late 2007. http://www.fcx.com/operations/USA_Safford.htm
References
Reference (Reserve-Resource): PHELPS DODGE CORP SEC FM 10-K REPT. 12/31/93., P. 10.
Reference (Geology): The Lone Star and Safford webpages at portergeo.com contain geological descriptions. http://www.portergeo.com.au/
URL: http://www.portergeo.com.au/
Reference (Reserve-Resource): WORLD MINING MAGAZINE. MAY 1981, P. 51.
Reference (Ownership): JUST SIMPLY KENNECOTT, SALT LAKE CITY TRIBUNE, MARCH 19,1983.
Reference (Deposit): KENNECOTT TRYING SOLUTION MINING AT SAFFORD PROSPECT, PAY DIRT 8/25/75 P42
Reference (Geology): Williams, S.A., and Forrester, J.D., 1995, Characteristics of porphyry copper deposits, in Pierce, F.W., and Bolm, J.G., eds., Porphyry copper deposits of the American Cordillera: Tucson, Arizona Geological Society Digest 20, p. 21?34
Reference (Deposit): KENNECOTT INVESTIGATES SOLUTION MINING POTENTIAL OF DEEP CU DEPOSIT E/MJ SEPT 1975 VOL 176 NO 9 P37
Reference (Reserve-Resource): PHELPS DODGE CORP. 1995 ANNUAL REPORT, P.23.
Reference (Deposit): SLOOP, JUNE 1,1967, ATOMIC ENERGY COMMISSION AVAIL FROM CLEARINGHOUSE FOR FED SCIENT AND TECH INFO, SPRINGFIELD VA
Reference (Reserve-Resource): PHELPS DODGE CORP., 1994 10-K, P.14.
Reference (Deposit): SW PAY DIRT, 2-95, P.10A.
Reference (Deposit): SKILLINGS' MINING REVIEW, 11-30-96, P.6.
Reference (Deposit): HANSEN, S AND RABB, D , SEEK PROFITABILITY ANSWER TO NUCLEAR IN-SITU COPPER LEACHING AT SAFFORD, WORLD MINING, JAN 1978,V 4 NO 1, P 24-27
Reference (Deposit): ROBINSON, R.F. AND COOK, A.,1966, THE SAFFORD COPPER DEPOSIT, LONE STAR MINING DISTRICT, GRAHAM COUNTY, ARIZONA, IN: GEOLOGY OF THE PORPHYRY COPPER DEPOSITS Southwestern North America, EDITED BY TITLEY, S.R AND HICKS, C.L. THE UNIVERSITY OF ARIZONA PRESS, TUCSON, ARIZ., P. 251-266
Reference (Geology): Langton, J.M., and Williams, S.A., 1982, Structural, petrological and mineralogical controls for the Dos Pobres orebody, Lone Star mining district, Graham County, Arizona, in Titley, S.R., ed., Advances in geology of the porphyry copper deposits, southwestern North America University of Arizona Press, Tucson pp 335-352
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.
