Petrological and geochemical evolution of the alkaline Valle Chico Massif, southeastern Uruguay

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dc.contributor.authorMuzio, R.
dc.contributor.authorArtur, A. C.
dc.contributor.authorWernick, E.
dc.contributor.institutionINGEPA
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:19:57Z
dc.date.available2014-05-20T15:19:57Z
dc.date.issued2002-04-01
dc.description.abstractThe Valle Chico Massif is a member of the Early Cretaceous alkaline magmatic suite of rocks distributed around the Parana Basin. Three magmatic associations are recognized: (1) the Plutonic Association, characterized by syenites, quartz syenites, and syenogranites; (2) the Volcanic Association, mainly composed of porphyritic quartz trachytes; and (3) the Porphyritic Dike Association consisting of rhyolites and trachytes. Judging by their geochemical behavior, the rhyolites exhibit a weak peralkaline affinity, and are genetically connected by progressive melting processes, whereas the other lithologies have a metaluminous nature, and are products of mineral fractionation. An enriched mantle of Transamazonian age, geochemically similar to OIB, is postulated as a possible source.en
dc.description.affiliationINGEPA, Inst Geol & Palaeontol, Fac Ciências, Dept Geol, Montevideo 11400, Uruguay
dc.description.affiliationUniv Estadual Paulista, Dept Petrol & Met Ogenia, IGCE, BR-13506900 São Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Dept Petrol & Met Ogenia, IGCE, BR-13506900 São Paulo, Brazil
dc.format.extent352-369
dc.identifierhttp://dx.doi.org/10.2747/0020-6814.44.4.352
dc.identifier.citationInternational Geology Review. Palm Beach: V H Winston & Son Inc., v. 44, n. 4, p. 352-369, 2002.
dc.identifier.doi10.2747/0020-6814.44.4.352
dc.identifier.issn0020-6814
dc.identifier.lattes6304996409946085
dc.identifier.urihttp://hdl.handle.net/11449/31331
dc.identifier.wosWOS:000177834500003
dc.language.isoeng
dc.publisherV H Winston & Son Inc
dc.relation.ispartofInternational Geology Review
dc.relation.ispartofjcr2.875
dc.relation.ispartofsjr1,602
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titlePetrological and geochemical evolution of the alkaline Valle Chico Massif, southeastern Uruguayen
dc.typeArtigo
dcterms.licensehttp://journalauthors.tandf.co.uk/permissions/reusingOwnWork.asp
dcterms.rightsHolderV H Winston & Son Inc
unesp.author.lattes6304996409946085
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Geociências e Ciências Exatas, Rio Claropt

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Artigos - Petrologia e Metalogenia - IGCE