Copper geochemistry in salt from evaporite soils, coastal range of the atacama desert, northern chile: an exploration tool for blind cu deposits

GEOCHEMISTRY-EXPLORATION ENVIRONMENT ANALYSIS;
Geochem.-Explor. Environ. Anal.

dc.creatorLAHSEN-AZAR, ALFREDO
dc.creatorGUERRA-SEPULVEDA, NELSON
dc.creatorTOWNLEY-CALLEJAS, BRIAN
dc.creatorPARADA-REYES, MIGUEL
dc.creatorPALACIOS-MONASTERIO, CARLOS
dc.date2017-04-27T18:51:10Z
dc.date2022-07-07T02:20:40Z
dc.date2017-04-27T18:51:10Z
dc.date2022-07-07T02:20:40Z
dc.date2005
dc.date.accessioned2023-08-21T20:41:26Z
dc.date.available2023-08-21T20:41:26Z
dc.identifier0
dc.identifierD01I1012
dc.identifierD01I1012
dc.identifierWOS:000233038500008
dc.identifier1467-7873
dc.identifierhttps://hdl.handle.net/10533/197304
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8279737
dc.descriptionThe evaporite soil (1.5 to 15 m thick) in the Coastal Range of northern Chile is a serious obstacle to mineral exploration. We conducted a Cu geochemical study in salt beds (mainly gypsum and anhydrite) from this soil. The sampling was distributed over mineralized and barren rocks, in salts of evaporitic soils from hills, slopes, gullies, plains and alluvium-filled valleys. The samples of salt from hills and slopes reflect very well the presence of blind ore deposits, and the magnitude of the Cu anomalies ( < 200 to > 1000 ppm Cu) is independent of the depth at which the mineralization is located. Similar geochemical response has been found in salt from evaporitic sods that cover gullies, plains and alluvium-filled valleys. However, in the last case the magnitude of the Cu anomalies ( < 20 to > 200 ppm Cu) depends on the thickness of the gravels and the depth of leached bedrock that covers the blind deposits. Although the Cu anomalies are spiky, their contrast with the back-ground Cu population is remarkable. Sampling of salt from evaporitic soils appears to be a valuable tool for exploration of buried Cu deposits in the exceedingly and Coastal Range of the Atacama Desert.
dc.description0
dc.description16
dc.descriptionFONDEF
dc.descriptioncpalacio@cec.uchile.cl; nguerra@ucn.cl; btownley@cec.uchile.cl; alahsen@cec.uchile.cl; maparada@cec.uchile.cl
dc.description0
dc.descriptionFONDEF
dc.description5
dc.languageENG
dc.publisherGEOLOGICAL SOC PUBL HOUSE
dc.relationinstname: Conicyt
dc.relationreponame: Repositorio Digital RI2.0
dc.relationinstname: Conicyt
dc.relationreponame: Repositorio Digital RI2.0
dc.relationinfo:eu-repo/grantAgreement/Fondef/D01I1012
dc.relationinfo:eu-repo/semantics/dataset/hdl.handle.net/10533/93477
dc.relationhttps://doi.org/10.1144/1467-7873/05-075
dc.rightsinfo:eu-repo/semantics/openAccess
dc.titleCopper geochemistry in salt from evaporite soils, coastal range of the atacama desert, northern chile: an exploration tool for blind cu deposits
dc.titleGEOCHEMISTRY-EXPLORATION ENVIRONMENT ANALYSIS
dc.titleGeochem.-Explor. Environ. Anal.
dc.typeArticulo
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.coverageBATH


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