Major And Trace Elements In A Granulite Facies Metagabbro From The Proterozoic High Grade Terrain Of Guaxupé, Southeastern Brazil, And The Nature Of The Mantle Source

dc.creatorChoudhuri A.
dc.creatorBarrueto H.R.
dc.creatorHaack U.
dc.date2000
dc.date2015-06-30T19:52:34Z
dc.date2015-11-26T14:47:38Z
dc.date2015-06-30T19:52:34Z
dc.date2015-11-26T14:47:38Z
dc.date.accessioned2018-03-28T21:58:11Z
dc.date.available2018-03-28T21:58:11Z
dc.identifier
dc.identifierNeues Jahrbuch Fur Mineralogie, Monatshefte. , v. 6, n. , p. 241 - 263, 2000.
dc.identifier283649
dc.identifier
dc.identifierhttp://www.scopus.com/inward/record.url?eid=2-s2.0-0040214622&partnerID=40&md5=43f9eb5c680bb573b118378ad351c306
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/107439
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/107439
dc.identifier2-s2.0-0040214622
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1253363
dc.descriptionMafic rocks are often the key to magmatic and metamorphic processes that take place deep within the continental crust. Their chemical composition, taken together with field and petrographic study, are useful in assessing the nature of their mantle source and possible geological setting in which they were emplaced. A metagabbro body in the high-grade terrain of Guaxupé, southeastern Brazil, serves as a good example for deciphering the origin of basic magmas in a granulite belt. The metagabbro largely preserves igneous textures, recrystallized in granulite facies, despite the fact that it occurs in a zone of intense ductile deformation that has affected the charnockite and garnet-biotite gneiss country rocks. The basic body varies from olivine websterite, through websterite to gabbro, and major and trace elements confirm the narrow range of its differentiation. K, Rb, and the HFSE, Zr, Nb, Ti, and P are low; their Zr/Y ratios are lower than for other mafic granulites of this region; REE and multi-element values point to a continental margin setting; their Sm-Nd isotopes suggest an enriched mantle source. These rocks possibly represent a component of basaltic underplating in the Guaxupé nappe that caused high thermal gradients responsible for granulite facies metamorphism, as well as partial melting of crustal rocks, such as garnet-biotite gneisses, under high-grade conditions.
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dc.languageen
dc.publisher
dc.relationNeues Jahrbuch fur Mineralogie, Monatshefte
dc.rightsfechado
dc.sourceScopus
dc.titleMajor And Trace Elements In A Granulite Facies Metagabbro From The Proterozoic High Grade Terrain Of Guaxupé, Southeastern Brazil, And The Nature Of The Mantle Source
dc.typeArtículos de revistas


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