Mine detail: East Helvetia Deposit

Previously called 'Rosemont'

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Location: Pima County, Arizona, United States, North America
Lat / long: 31.83319, -110.75985
dep_id: 10026900
mrds_id: M000917
Commodity type: metallic
Major mineral: Copper Oxide, Copper Sulfide
Minor mineral: Molybdenum
Operation type: Unknown
Production size: Small ammount of material produced
Development status: Past Producer
ore: Bornite, Chalcocite, Chalcopyrite, Chrysocolla, Cuprite, Malachite, Molybdenite, Pyrite
gangue: Biotite
alteration: Skarnification, Pyritization, Silicification, Argillization
conc_proc: Secondary Enrichment Only Locally Important
ore_ctrl: Intrusions, Lithology, Limestone Skarns
Reporter: Peterson, Jocelyn A., Orris, Greta J.
hrock_unit: Horquilla Limestone;Scherrer Formation, Concha Limestone;Bisbee Group
hrock_type: Quartzite,Limestone
arock_unit: Greaterville Intrusives
arock_type: Quartz Monzonite,Quartz Latite
Structure: Flat Thrust Fault Separating Paleozoic Limestones From Overlying B Isbee Group
tectonic: Basin And Range
Year first produced: 1875
yr_lst_prd: 1959
disc_yr: 1961
References:
  • Deposit:: DREWES, 1971, USGS MAP I-613.
  • Deposit:: JIM KELLY, ANAMAX MINING CO (PERSONAL COMMUN. TO JAN WILT).
  • 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.
  • Other Database:: CIMRI
  • Reserve-Resource:: SAWYER AND OTHERS, 1992.
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