Arizona · Pima County
Past Producer

East Helvetia Deposit

Pima County, Arizona, United States
Copper OxideCopper SulfideMolybdenum
⌖ Show on mapUSGS source ↗
Commodities
PrimaryCopper Oxide, Copper Sulfide
SecondaryMolybdenum
Commodity typeM
Deposit
Deposit sizeS
Ore controlIntrusions, Lithology, Limestone Skarns
Materials
Ore mineralsBornite, Chalcocite, Chalcopyrite, Chrysocolla, Cuprite, Malachite, Molybdenite, Pyrite
GangueBiotite
Geology
Host rockQuartzite,Limestone · Horquilla Limestone;Scherrer Formation, Concha Limestone;Bisbee Group
Associated rockQuartz Monzonite,Quartz Latite · Greaterville Intrusives
StructureFlat Thrust Fault Separating Paleozoic Limestones From Overlying B Isbee Group
Tectonic settingBasin And Range
AlterationSkarnification, Pyritization, Silicification, Argillization
Economic & production
Development statusPast Producer
First production1875
Last production1959
Discovery year1961
Identification
Deposit ID10026900
MRDS IDM000917
Alternate namesRosemont
RegionNA
Data scoreB
Coordinates31.83319, -110.75985
References
DREWES, 1971, USGS MAP I-613.JIM KELLY, ANAMAX MINING CO (PERSONAL COMMUN. TO JAN WILT).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.CIMRISAWYER AND OTHERS, 1992.