The East Helvetia Deposit is a copper sulfide and copper oxide mine located in Pima county, Arizona at an elevation of 6,558 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: 6,558 Feet (1,999 Meters)
Commodity: Copper Sulfide, Copper Oxide
Lat, Long: 31.83306, -110.75917
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.
East Helvetia Deposit MRDS details
Site Name
Primary: East Helvetia Deposit
Secondary: Rosemont
Commodity
Primary: Copper Sulfide
Primary: Copper Oxide
Secondary: Molybdenum
Location
State: Arizona
County: Pima
District: Helvetia-Rosemont District
Land Status
Land ownership: National Forest
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.
Administrative Organization: Coronado National Forest
Holdings
Not available
Workings
Not available
Ownership
Owner Name: Asarco (American Smelting And Refining Co.)
Years: 1988 -
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1875
Year Last Production: 1959
Discovery Year: 1961
Discovery Method: Other
Years of Production:
Organization:
Significant: N
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
Type: L
Description: Flat Thrust Fault Separating Paleozoic Limestones From Overlying B Isbee Group
Alterations
Alteration Type: L
Alteration Text: Skarnification, Pyritization, Silicification, Argillization
Rocks
Name: Quartz Latite
Role: Associated
Age Type: Associated Rock Unit
Age in Years: 56.000000+-
Age Young: Tertiary
Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock Unit
Age in Years: 56.000000+-
Age Young: Tertiary
Analytical Data
Analytical Data: 0.016-0.017% MO
Materials
Ore: Chrysocolla
Ore: Molybdenite
Ore: Chalcopyrite
Ore: Pyrite
Ore: Chalcocite
Ore: Malachite
Ore: Cuprite
Ore: Bornite
Gangue: Biotite
Comments
Comment (Deposit): OVERLAIN BY 300 FT OF CRET SEDIMENTS ON WEST AND BY 1200 FT ON EAST. PORPHYRY IS NOT VERY MINERALIZED.
Comment (Deposit): THIS REPORT WAS TAKEN FROM RECORD M000917 OF JAN WILT IN MOLYBDENU M FILE, CONTACT PERSON T.G. THEODORE, USGS ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT
Comment (Location): INFO FROM LAND.ST :1964
Comment (Development): ASARCO INC. ACQUIRED THE PROPERTY AS A 'LONG-TERM COPPER RESERVE" AND HAS NO IMMEDIATE PALNS TO DEVELOP IT.
References
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.
Reference (Other Database): CIMRI
Reference (Reserve-Resource): SAWYER AND OTHERS, 1992.
Reference (Deposit): DREWES, 1971, USGS MAP I-613.
Reference (Deposit): JIM KELLY, ANAMAX MINING CO (PERSONAL COMMUN. TO JAN WILT).
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.
