Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/3942
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dc.contributor.authorCampos, T. F. C.-
dc.contributor.authorNeiva, A. M. R.-
dc.contributor.authorNardi, L. V. S.-
dc.date.accessioned2008-08-29T16:07:02Z-
dc.date.available2008-08-29T16:07:02Z-
dc.date.issued2002en_US
dc.identifier.citationLithos. 64:3-4 (2002) 131-153en_US
dc.identifier.urihttp://hdl.handle.net/10316/3942-
dc.description.abstractThe Rio Espinharas pluton, northeastern Brazil, belongs to the shoshonitic series and consists mainly of syenogranite, quartz-monzonite and porphyritic quartz-monzonite, but diorite, quartz-monzodiorite, quartz-syenite and microsyenogranite also occur containing microgranular enclaves, except for the diorite. Most variation diagrams of rocks, amphiboles, biotites and allanites show linear trends, but K, Zr, Sr and Ba of rocks display curved scattered trends. The rocks ranging from diorite to syenogranite define a pseudo-errorchron and have similar REE patterns. Syenogranite and microsyenogranite are derived from two distinct pulses of granite magma with initial 87Sr/86Sr ratio of 0.7083±0.0003 and 0.7104±0.0007, respectively. Modelling of major and trace elements shows that the syenogranite evolved by fractional crystallization of plagioclase, microcline, edenite, biotite and titanite, whereas quartz-monzonite, porphyritic quartz-monzonite, quartz-monzodiorite and quartz-syenite resulted from simple mixing between an upper mantle-derived dioritic magma and the upper crust-derived syenogranite magma. Dioritic enclaves are globules of a mafic magma from the upper mantle.en_US
dc.description.urihttp://www.sciencedirect.com/science/article/B6V6J-46X86NR-5/1/0e5ce1dcc0c8fe91ebd680e6f2ac523ben_US
dc.format.mimetypeaplication/PDFen
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectHybrid rocksen_US
dc.subjectGranitesen_US
dc.subjectMicrogranular enclavesen_US
dc.subjectGeochemistryen_US
dc.subjectRb-Sr isotopesen_US
dc.titleGeochemistry of the Rio Espinharas hybrid complex, northeastern Brazilen_US
dc.typearticleen_US
dc.identifier.doi10.1016/S0024-4937(02)00199-8-
item.grantfulltextopen-
item.fulltextCom Texto completo-
item.languageiso639-1en-
Appears in Collections:FCTUC Ciências da Terra - Artigos em Revistas Internacionais
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