Mine detail: Commonwealth Mine

Previously called 'RitterBrockmanDiscovery StopePearce MineIncludes Eisenhart VeinNorthSmithFootwa LlMainExtensionRinaudHartery Veins'

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Location

Lat / long:

31.90069, -109.81509

Resource(M)

Primary:	Silica, Silver, Gold
Tertiary:	Molybdenum, Copper, Lead, Vanadium
Ore:	Argentite, Cerargyrite, Chalcocite, Chalcopyrite, Chrysocolla, Embolite, Galena, Gold, Iodyrite, Molybdenite, Proustite, Pyrite, Silver, Tetrahedrite, Wulfenite
Gangue:	Alunite, Calcite, Fluorite, Gypsum, Hematite, Jarosite, Kaolin, Limonite, Rhodochrosite, Sericite, Siderite
Orebody form:	TABULAR, STRINGERS, MASSIVE
Other material:	Quartz
Discovery year:	1895

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
Production years:	1895-1942, OTHER
First production started:	1895
Last production ended:	1979

Geology

Host type:	Rhyolite,Andesite
Associated rock:	Pearce Volcanics;Brockman Andesite
Associated type:	Rhyolite,Andesite
Structure:	Flows Dip 35-40e, Fissure Veins And Fault Breccia Zones; N-S Faults Are Premineraliz Ation, Others Are Postmineralization
Alteration processes:	Propylitic, Silicification, Oxidation; Alteration More Intense In And Near Vein Fractures. Sericitic And K-Spar Alteration Closest To The Veins, With Extensive Argillic And Propylitic Alteration Away From The Veins.

References

MRDS	M030569
DEP	10103554
Reference	{Deposit:: SMITH, 1927, MS THESIS, UNIVERSITY OF ARIZONA.}{Deposit:: KEITH, 1973, ABM BULL 187.}{Deposit:: ABM FILE DATA.}{Deposit:: SCOTT, 1916, MINING AND ENGINEERING WORLD, V. 45, P. 187-188.}{Deposit:: HOWELL, 1977, MS. THESIS, UNIVERSITY OF ARIZONA.}{Deposit:: ADMR FILE DATA}{Deposit:: HEYLMUN, E.B., 1988, COMMONWEALTH SILVER-GOLD MINE, ARIZONA: CALIFORNIA MINING JOURNAL, V. 57, NO. 5, P. 14-16.}{Deposit:: NIEMUTH, N.J., 1987, ARIZONA MINERAL DEVELOPMENT 1984-1986: ARIZONA DEPARTMENT OF MINES AND MINERAL RESOURCES DIRECTORY 29, 46 P.}{Deposit:: SAWYER, M.B., GURMENDI, A.C., DALEY, M.R., AND HOWELL, S.B., 1992, PRINCIPAL DEPOSITS OF STRATEGIC AND CRITICAL MINERALS IN ARIZONA: UNITED STATS BUREAU OF MINES SPECIAL PUBLICATION, 334 P.}{Other Database:: CIMRI}{Production:: KEITH, 1973, P. 69; HEYLMUN, 1988, P. 16; SAWYER AND OTHERS, 1992.}{Reserve-Resource:: NIEMUTH, 1987.}
Reporter	Peterson, Jocelyn A., Bolm, Karen S., Orris, Greta J.