Mine detail: La Escondida

Previously called 'Econdida'

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Location

Lat / long: -24.25084, -69.08284

Resource(M)

Primary: Copper
Secondary: Molybdenum, Zinc, Silver, Gold, Lead
Ore: Bornite, Chalcocite, Chalcopyrite, Covellite, Galena, Molybdenite, Sphalerite
Gangue: Biotite, Chlorite, Feldspar, Goethite, Hematite, Jarosite
Discovery year: 1981

Production

Operation type: Unknown
Production size: Small
Development status: Producer

Geology

Host type:Diorite,Andesite
Associated type:Diorite,Andesite
Tectonic:Andes
Alteration processes:Silicic, Phyllic, And Argillic Zones 5km X 9km; Propylitic Halo Is 2km X 3km. Also Potassic Alteration. A Correlation Is Displayed Between Hypogene Alteration Mineralogy And Mobility Of Copper In The Supergene Environment.

References

MRDSTC03767
DEP10058041
Reference{Deposit:: RUIZ, C. Y PEEBLES, F., 1988, YACIMIENTOS METALIFEROS DE CHILE: SANTIAGO, 334 P.}{Deposit:: MINING JOURNAL, 1990 (24 AUGUST), P. 142.}{Deposit:: ORTIZ, F. Y OTROS, 1985, RESENA TECNICA DEL DESCUBRIMIENTO DEL YACIMIENTO DE PORFIDO CUPRIFERO LA ESCONDIDA: IV CONGRESO GEOLOGICO CHILENO.}{Deposit:: SILLITOE, R.H., 1988, EPOCHS OF INTRUSION-RELATED COPPER MINERALIZATION IN THE ANDES: S. AM. JOUR. EARTH SCI., 1, P. 89-108.}{Deposit:: OJEDA, F.J.M., 1986, ESCONDIDA PORPHYRY COPPER DEPOSIT, II REGION, CHILE: EXPLORATION DRILLING AND CURRENT GEOLOGICAL INTERPRETATION, IN: MINING LATIN AMERICA, IMM, LONDON, P. 299-318.}{Deposit:: MINERIA CHILENA, 1989, P. 73.}{Deposit:: PUIG, A., 1988, GEOLOGIC AND METALLOGENIC SIGNIFICANCE OF THE ISOTOPIC COMPOSITION OF LEAD IN GALENAS OF THE CHILEAN ANDES: EG, 83, P. 843-858.}{Deposit:: BORIC, R., DIAZ, F., AND MAKSAEV, V., 1984, COMPLEMENTO MAPA METALOGENICO, II REGION: GERENCIA DE DESAROLLO, SANTIAGO, (12VOLS.).}{Deposit:: ANON., 1994, ESCONDIDA JULY OUTPUT: MINING JOURNAL LONDON, OCTOBER 7, 1994, V. 323, NO. 8296, P. 255.}{Deposit:: SHILLINGS, D.N., JR., 1988, MINERA ESCONDIDA LTDA. TO PROCEED WITH WORL* LARGEST COPPER DEVELOPMENT: SKILLIN* MINING REVIEW, MAY 14, P. 4-7.}{Deposit:: ALPERS, C.N., AND BRIMHALL, G.H., 1989, PALEOHYDROLOGIC EVOLUTION AND GEOCHEMICAL DYNAMICS OF CUMULATIVE SUPERGENE METAL ENRICHMENT AT LA ESCONDIDA, ATACAMA DESERT, NORTHERN CHILE: ECONOMIC GEOLOGY, V. 84, P. 229-255.}{Deposit:: ALPHERS, C.N., AND BRIMHALL, G.H., 1988, MIDDLE MIOCENE CLIMATIC CHANGE IN THE ATACAMA DESERT, NORTHERN CHILE: EVIDENCE FROM SUPERGENE MINERALIZATION AT LA ESCONDIDA: GEOLOGICAL SOCIETY OF AMERICA BULLETIN, V. 100, P. 1640-1656.}{Other Database:: CIMRI}{Production:: MINING JOURNAL, (1990); ANON. (1994).}{Reserve-Resource:: MINERIA CHILENA, 1989.}
ReporterBolm, Karen S., Williams, William C., Page, Norman J.