PETROGENESIS OF THE LATE PROTEROZOIC CURACA MAFIC DYKE SWARM, BRAZIL - ASTHENOSPHERIC MAGMATISM ASSOCIATED WITH CONTINENTAL COLLISION

dc.creatorOLIVEIRA, EP
dc.creatorTARNEY, J
dc.date1995
dc.date2014-12-16T11:31:44Z
dc.date2015-11-26T16:54:14Z
dc.date2014-12-16T11:31:44Z
dc.date2015-11-26T16:54:14Z
dc.date.accessioned2018-03-28T23:41:30Z
dc.date.available2018-03-28T23:41:30Z
dc.identifierMineralogy And Petrology. Springer-verlag Wien, v. 53, n. 41699, n. 27, n. 48, 1995.
dc.identifier0930-0708
dc.identifierWOS:A1995QV83700002
dc.identifier10.1007/BF01171945
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/59383
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/59383
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/59383
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1276802
dc.descriptionThe late Proterozoic Curaca mafic dyke swarm is one of the more alkaline swarms of the Brazilian Precambrian. Intra-dyke chemical variations are characterised by higher abundances of incompatible elements in dyke margins than in the dyke centres, a feature that may have resulted from flowage differentiation, from progressive evacuation of liquids from zoned magma chambers, or possibly through dynamic melting of an uprising diapir. Inter-dyke chemical differences are best interpreted by different extents of melting of a mantle source with a small modal proportion of garnet. This source was heterogeneous and had the trace element compositions of ocean island basalts with Dupal and non-Dupal characteristics. The emplacement of the Curaca dykes from 650-700 Ma may have been facilitated by the extensional tectonics perpendicular to the collision zone between the Sao Francisco craton and the Pernambuco-Alagoas massif during the evolution of the Sergipano orogen. The energy in the system was insufficient to promote much melting of, or interaction with, the continental lithosphere or overlying crust.
dc.description53
dc.description41699
dc.description27
dc.description48
dc.languageen
dc.publisherSpringer-verlag Wien
dc.publisherVienna
dc.publisherAustria
dc.relationMineralogy And Petrology
dc.relationMineral. Petrol.
dc.rightsfechado
dc.rightshttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dc.sourceWeb of Science
dc.subjectRare-earth Elements
dc.subjectMid-atlantic Ridge
dc.subjectTrace-element
dc.subjectFlood Basalts
dc.subjectSr-isotope
dc.subjectJurassic Dolerites
dc.subjectAlkaline Magmas
dc.subjectIgneous Rocks
dc.subjectMantle Plume
dc.subjectNd-isotope
dc.titlePETROGENESIS OF THE LATE PROTEROZOIC CURACA MAFIC DYKE SWARM, BRAZIL - ASTHENOSPHERIC MAGMATISM ASSOCIATED WITH CONTINENTAL COLLISION
dc.typeArtículos de revistas


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