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dc.contributor.CRUESPUNIVERSIDADE DE ESTADUAL DE CAMPINASpt
dc.identifier.isbnpt
dc.typeArtigo de periódicopt
dc.type.categorypt
dc.titleGeology And Hydrothermal Alteration Of The Chapi Chiara Prospect And Nearby Targets, Southern Peru, Using Aster Data And Reflectance Spectroscopypt
dc.contributor.authorCarrinopt
dc.contributor.authorThais Andressa; Crostapt
dc.contributor.authorAlvaro Penteado; Bemfica Toledopt
dc.contributor.authorCatarina Laboure; Silvapt
dc.contributor.authorAdalene Moreira; Silvapt
dc.contributor.authorJohann Lambertpt
unicamp.author.emailalvaro@ige.unicamp.brpt
unicamp.authorSilva, Johann Lambert] Univ Estadual Campinas, Inst Geosci, BR-13083870 Campinas, SP, Brazilpt
unicamp.author.external[Carrino, Thais Andressapt
unicamp.author.externalCrosta, Alvaro Penteadopt
unicamp.author.external[Bemfica Toledo, Catarina Labourept
unicamp.author.externalSilva, Adalene Moreira] Univ Brasilia, Inst Geosci, BR-70910900 Brasilia, DF, Brazilpt
dc.subjectPrincipal Component Analysispt
dc.subjectSpaceborne Thermal Emissionpt
dc.subjectAlteration Mineralspt
dc.subjectOrcopampa-districtpt
dc.subjectSpectral-analysispt
dc.subjectAltered Rockspt
dc.subjectArgentinapt
dc.subjectEvolutionpt
dc.subjectPatagoniapt
dc.subjectDepositpt
dc.description.abstractSouthern Peru contains several small- and medium-sized epithermal Au-Ag (+/- base metals) deposits related to Miocene-Pliocene metallogenetic belts. Specifically, the characterization of the geology and mapping of hydrothermal alteration zones of the Chapi Chiara prospect, Canahuire deposit, and Cerro Millo and San Antonio de Esquilache targets were done with data acquired by Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) spaceborne sensor. ASTER mapping techniques included (1) band ratio and principal component analysis (Crosta technique) applied to the visible and near-infrared and short-wave infrared bands to produce a regional hydrothermal alteration map (alunite and/or kaolinite, illite-muscovite and/or smectite, iron-bearing minerals) and (2) spectral indices and selective principal component analysis applied to the thermal infrared bands to detect quartz- and carbonates-bearing targets, respectively. These methods were used to establish a hydrothermal zoning pattern in paleostratovolcanoes, where the Chapi Chiara, Cerro Millo, and San Antonio de Esquilache targets are located. This zoning pattern was used to infer erosion conditions and the potential for metal deposits based on the mineralogy, which was also analyzed using reflectance spectroscopy and petrography. In addition, ASTER data were used to characterize the carbonate host rocks, the quartz-bearing units of the Yura Group, and the quartz-poor unit associated with the phreatic and phreatomagmatic breccias in the Canahuire deposit region. This characterization led to the development of a favorability model for the occurrence of "Canahuire-type" deposits based on spatial analysis using the fuzzy logic technique.en
dc.relation.ispartofECONOMIC GEOLOGYpt_BR
dc.publisher.countryLITTLETONpt
dc.publisherSOC ECONOMIC GEOLOGISTS, INCpt
dc.publisherpt
dc.date.issued2015-JAN-FEBpt
dc.identifier.citationGeology And Hydrothermal Alteration Of The Chapi Chiara Prospect And Nearby Targets, Southern Peru, Using Aster Data And Reflectance Spectroscopy. Soc Economic Geologists, Inc, v. 110, p. 73-90 JAN-FEB-2015.pt
dc.language.isoenpt
dc.description.volume110pt
dc.description.issuenumber1pt
dc.description.issuesupplementpt
dc.description.initialpage73pt
dc.description.lastpage90pt
dc.rightsfechadopt
dc.sourceWOSpt
dc.identifier.issn0361-0128pt
dc.identifier.wosidWOS:000349056100004pt
dc.identifier.doipt
dc.identifier.urlhttp://econgeol.geoscienceworld.org/content/110/1/73en
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt
dc.description.sponsorshipNational Council for Scientific and Technological Developmentpt
dc.description.sponsorship1Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt
dc.description.sponsordocumentnumberFAPESP [2011/00106-8]pt
dc.date.available2016-06-07T13:14:55Z-
dc.date.accessioned2016-06-07T13:14:55Z-
dc.description.provenanceMade available in DSpace on 2016-06-07T13:14:55Z (GMT). No. of bitstreams: 1 wos_000349056100004.pdf: 15127742 bytes, checksum: 5a8dc66b76365867cebcad74f627694d (MD5) Previous issue date: 2015en
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/241745-
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dc.description.conferencepatrocinadorpt
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