Mine detail: Esperanza

Previously called 'Old New Yea* Eve ShaftWest EsperanzaSierritaAmargosaMatt McgeeEsperanza Sierrita'

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Location

Lat / long: 31.86984, -111.12541

Resource(M)

Primary: Copper, Molybdenum
Secondary: Silver, Gold, Lead, Zinc
Ore: Chalcocite, Chalcopyrite, Copper, Covellite, Cuprite, Ferrimolybdite, Galena, Malachite, Melaconite, Molybdenite, Pyrite, Silver, Sphalerite, Tenorite, Torbernite
Gangue: Goethite, Hematite, Jarosite, Limonite, Magnetite
Orebody form: OVATE, MASSIVE
Discovery year: 1895

Production

Operation type: Unknown
Production size: Large
Development status: Past Producer
First production started: 1959
Last production ended: 1986

Geology

Host type:Quartzite,Volcanic Rock (Aphanitic),Welded Tuff,Rhyolite
Associated rock:Ruby Star Quartz Monzonite Porphyry;Ox Frame Volcanics
Associated type:Quartz Latite
Structure:Broad Nw Trending Shear Zone. Faults Trending Ne-Ene, Dip Nw & Se; Nw-Nnw, Dip Ne & Sw; N-S, Dip E & W
Alteration processes:Clay (Moderate To Intense), Quartz-Sericite-K Feldspar Argillation, Silication, Biotite

References

MRDSM050391
DEP10039594
Reference{Age:: Ruiz, J. and Mathur, R., 1999, Metallogenesis in continental margins: Re-Os evidence from porphyry copper deposits in Chile; in Lambert, D.D. and Ruiz, J., eds., Application of Radiogenic Isotopes to Ore Deposit Research and Exploration, Reviews in Economic Geology, v. 12, p. 59-72.}{Age:: Shafiqullah, M. and Langlois, J.D., 1978, The Pima mining district, Arizona, a geochronologic update; in James, H.L., Callender, J.F., Wilt, J.C. and Clemons, R.E., eds., Land of Cochise, Southeast Arizona, University of New Mexico, Field Conference Guidebook Number 29, p. 321-327.}{Deposit:: LYNCH, 1967, IN TITLEY & HICKS, UNIV OF AZ PRESS, P. 267-279.}{Deposit:: COOPER, 1960, USGS BULL 1112-C.}{Deposit:: KEITH, 1974, ABM BULL 189, P. 135.}{Deposit:: AIKEN & WEST, 1978, AZ GEOL SOC DIGEST, V. 11, P 117-128.}{Deposit:: SCHMIDT ET AL, 1959, SOUTHERN ARIZONA GUIDEBOOK II.}{Deposit:: EMJ, 1970, DUVAL DEDICATES THE SIERRITA OPEN PIT: JULY.}{Deposit:: EMJ, 1970, SIERRITA MAKES IT WITH BIG EQUIPMENT: AUGUST.}{Deposit:: ANDERSON, C.A., AND KUPFER, D.H., 1943, REPORT ON THE PROPERTIES OF THE AMARGOSA MOLYBDENUM AND COPPER CORP: PIMA COUNTY, ARIZONA OPEN FILE REPORT.}{Deposit:: WAR MINERALS REPORT, 1945, ESPERANZA PROPERTY, PIMA COUNTY, ARIZONA: WAR MINERALS REPORT 405.}{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 STATES BUREAU OF MINES SPECIAL PUBLICATION, 334 P.}{Other Database:: CIMRI}{Production:: EMJ, JULY, 1970; FIGURE 3 FROM GSA, 1968; SAWYER AND OTHERS, 1992.}{Reserve-Resource:: LYNCH, 1967 (ITEMS 1-4); EMJ, 1970 (ITEM 5); WAR MINERALS REPORT 405, 1945 (ITEM 6); COX, 1973, (ITEM 7); SAWYER AND OTHERS, 1992.}
ReporterPeterson, Jocelyn A., Orris, Greta J.