New Cu-Pb occurrence in gossan and hydrothermal breccias in the Nova Brasilândia Group, Rondônia State, Brazil: preliminary results, perspectives and interpretations

dc.creatorPRADO, Elias Martins Guerra
dc.creatorBERGAMI, Gustavo Negrello
dc.creatorSILVA, Luciano Castro da
dc.creatorRODRIGUES, Thiago Reis
dc.creatorGUERRA, Guilherme Iolino Troncon
dc.creatorSOUZA, Anderson Alves de
dc.creatorCAMPOS, Leandro Duarte
dc.date2016-12-23T16:45:36Z
dc.date2016-12-23T16:45:36Z
dc.date2016
dc.date.accessioned2023-10-03T21:04:20Z
dc.date.available2023-10-03T21:04:20Z
dc.identifierPRADO, Elias Martins Guerra et al. New Cu-Pb occurrence in gossan and hydrothermal breccias in the Nova Brasilândia Group, Rondônia State, Brazil: preliminary results, perspectives and interpretations. Technical Report, Brasília, n. 7, Jun. 2016.
dc.identifier2448-2242
dc.identifierhttps://rigeo.cprm.gov.br/handle/doc/17351
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/9180633
dc.descriptionCopper- and lead-bearing breccia and gossan were found at the outskirts of Rolim de Moura town, southeastern Rondonia State, Brazil, during geological mapping. Gossans and hydrothermal breccias are hosted by the paragneisses of Nova Brasilândia Group, which, at the studied area, is composed of banded iron formation, sillimanite-biotite-muscovite gneiss, metagabbro and metatonalite, deformed and metamorphosed during the Sunsás orogeny. The hydrothermal system consists of strongly oxidized massif sulfide zones (gossans), iron oxide veinlets and stockworks, silicate breccia and quartz veins. Hydrothermal alteration was mapped continuously along a 2.5 km ESE-WNW trend. ICP OES/ICP MS chemical analyses returned values up to 1668 ppm Cu and 46.9 ppm Pb in whole-rock gossan powders. Portable XRF results yielded copper, lead and zinc grades up to 800 ppm Cu, 720 ppm Pb and 150 ppm Zn in whole-rock gossan powders. Programmed petrographic, SEM, XRD and whole- -rock geochemistry studies will help to better characterize the mineralization.
dc.formatapplication/pdf
dc.languageen
dc.publisherCPRM
dc.relationTechnical Report;7
dc.rightsopen
dc.subjectGOSSAN
dc.subjectBRECHAS HIDROTERMAIS
dc.subjectMETALOGENIA
dc.subjectRONDÔNIA
dc.subjectANÁLISES QUÍMICAS
dc.titleNew Cu-Pb occurrence in gossan and hydrothermal breccias in the Nova Brasilândia Group, Rondônia State, Brazil: preliminary results, perspectives and interpretations
dc.typeArticle


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