A clinopyroxene-orthopyroxene-plagioclase symplectite formed by garnet breakdown in granulite facies, Guaxupe, Minas Gerais, Brazil

dc.creatorChoudhuri, A
dc.creatorSilva, D
dc.date2000
dc.dateOCT
dc.date2014-12-02T16:24:56Z
dc.date2015-11-26T17:20:14Z
dc.date2014-12-02T16:24:56Z
dc.date2015-11-26T17:20:14Z
dc.date.accessioned2018-03-29T00:07:51Z
dc.date.available2018-03-29T00:07:51Z
dc.identifierGondwana Research. Int Assoc Gondwana Research, v. 3, n. 4, n. 445, n. 452, 2000.
dc.identifier1342-937X
dc.identifierWOS:000089631000002
dc.identifier10.1016/S1342-937X(05)70754-1
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/52907
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/52907
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/52907
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1283086
dc.descriptionIn mafic granulites, garnet can form by reactions such as Opx + Pl = Cpx + Grt + Qtz; Opx + Pl = Grt + Qtz. As a result of isothermal decompression (ITD), garnet can then break down to a characteristic orthopyroxene-plagioclase symplectite. Mafic, iron-rich garnet-pyroxene granulite from the Guaxupe Massif has symplectite that formed by near-isothermal decompression, as a consequence of uplift of the granulite facies terrane. This symplectite was found to consist of vermicular clinopyroxene-orthopyroxene-plagioclase, with clinopyroxene clearly growing from the garnet that is breaking down, modal amounts of clinopyroxene being less than orthopyroxene. Electron probe analyses show dear differences between core (Cpx(1)), rim, and symplectite clinopyroxene (Cpx(2)). Considering also the presence of magnetite in the symplectite texture, garnet breakdown is thought to be better represented by a reaction such as Cpx(1) + Grt +O-2 = Cpx(2) + Opx + Pl +Mr + Qtz.
dc.description3
dc.description4
dc.description445
dc.description452
dc.languageen
dc.publisherInt Assoc Gondwana Research
dc.publisherOsaka
dc.publisherJapão
dc.relationGondwana Research
dc.relationGondwana Res.
dc.rightsfechado
dc.sourceWeb of Science
dc.subjectisothermal decompression
dc.subjectmafic granulites
dc.subjectsymplectite textures
dc.subjectMinas Gerais
dc.subjectBrazil
dc.subjectMafic Granulites
dc.subjectEast Antarctica
dc.subjectDecompression
dc.subjectDehydration
dc.subjectEvolution
dc.subjectPaths
dc.titleA clinopyroxene-orthopyroxene-plagioclase symplectite formed by garnet breakdown in granulite facies, Guaxupe, Minas Gerais, Brazil
dc.typeArtículos de revistas


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