Arizona · Pima County
Past Producer

Esperanza

Pima County, Arizona, United States
MolybdenumCopperZincLeadGoldSilver
⌖ Show on mapUSGS source ↗
Description

P.H. Chambers (1895)

Commodities
PrimaryMolybdenum, Copper
SecondaryZinc, Lead, Gold, Silver
Commodity typeM
Deposit
Deposit sizeL
WorkingsSurface
Orebody formOVATE, MASSIVE
Ore controlFaults Controlled Upward Movement Of Hypogene And Downward Movement Of Supergene Metallization.
Materials
Ore mineralsChalcocite, Chalcopyrite, Copper, Covellite, Cuprite, Ferrimolybdite, Galena, Malachite, Melaconite, Molybdenite, Pyrite, Silver, Sphalerite, Tenorite, Torbernite
GangueGoethite, Hematite, Jarosite, Limonite, Magnetite
Geology
Host rockQuartzite,Volcanic Rock (Aphanitic),Welded Tuff,Rhyolite
Associated rockQuartz Latite · Ruby Star Quartz Monzonite Porphyry;Ox Frame Volcanics
StructureBroad Nw Trending Shear Zone. Faults Trending Ne-Ene, Dip Nw & Se; Nw-Nnw, Dip Ne & Sw; N-S, Dip E & W
AlterationClay (Moderate To Intense), Quartz-Sericite-K Feldspar Argillation, Silication, Biotite
Economic & production
Development statusPast Producer
First production1959
Last production1986
Discovery year1895
Identification
Deposit ID10039594
MRDS IDM050391
Alternate namesOld New Year's Eve Shaft, West Esperanza, Sierrita, Amargosa, Matt Mcgee, Esperanza Sierrita
RegionNA
Data scoreA
Coordinates31.86984, -111.12541
References
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.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.LYNCH, 1967, IN TITLEY & HICKS, UNIV OF AZ PRESS, P. 267-279.COOPER, 1960, USGS BULL 1112-C.KEITH, 1974, ABM BULL 189, P. 135.AIKEN & WEST, 1978, AZ GEOL SOC DIGEST, V. 11, P 117-128.SCHMIDT ET AL, 1959, SOUTHERN ARIZONA GUIDEBOOK II.EMJ, 1970, DUVAL DEDICATES THE SIERRITA OPEN PIT: JULY.EMJ, 1970, SIERRITA MAKES IT WITH BIG EQUIPMENT: AUGUST.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.WAR MINERALS REPORT, 1945, ESPERANZA PROPERTY, PIMA COUNTY, ARIZONA: WAR MINERALS REPORT 405.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.CIMRIEMJ, JULY, 1970; FIGURE 3 FROM GSA, 1968; SAWYER AND OTHERS, 1992.LYNCH, 1967 (ITEMS 1-4); EMJ, 1970 (ITEM 5); WAR MINERALS REPORT 405, 1945 (ITEM 6); COX, 1973, (ITEM 7); SAWYER AND OTHERS, 1992.