Commodities
PrimaryCopper
SecondaryZinc, Silver, Gold, Lead
TertiaryMolybdenum
Commodity typeM
Deposit
Deposit sizeS
WorkingsSurface/Underground
Orebody formIRREGULAR POCKETS, STRINGERS, LENSES, PODS
Ore controlShear Zone Due To Granodiorite Intrusive
Materials
Ore mineralsBornite, Chalcocite, Chalcopyrite, Chrysocolla, Cuprite, Malachite, Molybdenite, Pyrite
GangueDiopside, Garnet, Magnetite, Quartz
Geology
Host rockQuartzite,Limestone · Bolsa Quartzite
Associated rockDiorite · Granodiorite 54+-2my-Granodiorite;Granodiorite 1450+-10my Granodiorite
StructureHomoclinal ; Reg.Trends: Tilting And Broad Open Folds In S. And Extensive Faulting In N., Thrust And Normal Faulting-Fracture Zones
AlterationSilication
Economic & production
Development statusPast Producer
First production1899
Last production1956
Discovery year1898
Identification
Deposit ID10039490
MRDS IDM050159
Alternate namesLittle Helvetia, Forbes, Copper Duke
RegionNA
Data scoreA
Coordinates31.86957, -110.79401
References
SCHRADER, F.C., 1915, USGS BULL. 582.ARIZONA BUREAU OF MINES, 1971, FIELDNOTES, V.1, NO. 2.DREWES, H., 1971, USGS MAP I-613 (SAHUARITA QUAD).CREASEY, S.C., 1955, U.S.G.S. BULL 1027F.KEITH, S.B., 1974, INDEX OF MINING PROPERTIES IN PIMA COUNTY, ARIZONA: ARIZONA BUREAU OF MINES BULLETIN 189, P. 128.1909 RECON F.C. SCHRADER, U.S.G.S. BULL. 582.1971 DIREXPL ANACONDA-POSSIBLE NEW PORPH CU.1971 GEOLMAP H. DREWES U.S.G.S. MAP I-613.CIMRIANNUAL PRODUCTION FROM BULLETIN 582. CUM. PRODUCTION: (1) KEITH,1974, (2)ELSING,M.J.,1936, ABM BULLETIN 140.