Use este identificador para citar ou linkar para este item:
https://rigeo.sgb.gov.br/handle/doc/552
Registro completo
Campo DC | Valor | Idioma |
---|---|---|
dc.contributor.author | DREHER, Ana Maria | |
dc.contributor.author | XAVIER, Roberto P. | |
dc.contributor.author | TAYLOR, Bruce E. | |
dc.contributor.author | MARTINI, Sérgio Luiz | |
dc.date.accessioned | 2013-12-19T16:32:39Z | |
dc.date.available | 2013-12-19T16:32:39Z | |
dc.date.issued | 2008 | |
dc.identifier.citation | DREHER, Ana Maria; XAVIER, Roberto P; TAYLOR, Bruce E; MARTINI, Sérgio Luiz. New geologic, fluid inclusion and stable isotope studies on the controversial Igarapé Bahia Cu-Au deposit, Carajás Province, Brazil. Mineralium Deposita, Berlim, v.43, n.2, p.161-184, Berlim. | |
dc.identifier.uri | https://rigeo.sgb.gov.br/handle/doc/552 | |
dc.description.abstract | The Igarapé Bahia Cu–Au deposit in the Carajás Province, Brazil, is hosted by steeply dipping metavolcano-sedimentary rocks of the Igarapé Bahia Group. This group consists of a low greenschist grade unit of the Archean (∼2,750 Ma) Itacaiúnas Supergroup, in which other important Cu–Au and iron ore deposits of the Carajás region are also hosted. The orebody at Igarapé Bahia is a fragmental rock unit situated between chloritized basalt, with associated hyaloclastite, banded iron formation (BIF), and chert in the footwall and mainly coarse- to fine-grained turbidites in the hanging wall. The fragmental rock unit is a nearly concordant, 2 km long and 30–250 m thick orebody made up of heterolithic, usually matrix-supported rocks composed mainly of coarse basalt, BIF, and chert clasts derived from the footwall unit. Mineralization is confined to the fine-grained matrix and comprises disseminated to massive chalcopyrite accompanied by magnetite, gold, U- and light rare earth element (LREE)-minerals, and minor other sulfides like bornite, molybdenite, cobaltite, digenite, and pyrite|Evaporite-derived fluids also exclude a significant participation of magmatic or mantle-derived fluids, reinforcing the role of nonmagmatic brines in the genesis of Igarapé Bahia. Considering this aspect and the geological features, the possibility that the deposit was generated by a hydrothermal submarine system whose elevated salinity was acquired by leaching of ancient evaporite beds should be evaluated | |
dc.language | en | |
dc.subject | OURO | |
dc.subject | FERRO | |
dc.subject | CARAJÁS | |
dc.subject | BRASIL | |
dc.title | New geologic, fluid inclusion and stable isotope studies on the controversial Igarapé Bahia Cu-Au deposit, Carajás Province, Brazil | |
dc.type | Article | - |
dc.local | Berlin | |
Aparece nas coleções: | Artigos de Periódicos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
---|---|---|---|---|
art_ana _maria_dreher.pdf | producao cientifica | 923,5 kB | Adobe PDF | Visualizar/Abrir |
O uso do material disponibilizado neste repositório deve ser feito de acordo e dentro dos limites autorizados pelos Termos de Uso.