Please use this identifier to cite or link to this item: https://rigeo.cprm.gov.br/handle/doc/582
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dc.contributor.authorROSA-COSTA, Lúcia Travassos da
dc.contributor.authorLAFON, Jean-Michel
dc.contributor.authorDELOR, Claude
dc.date.accessioned2013-12-19T16:32:44Z
dc.date.available2013-12-19T16:32:44Z
dc.date.issued2006
dc.identifier.citationROSA-COSTA, Lúcia Travassos da; LAFON, Jean-Michel; DELOR, Claude. Zircon geochronology and Sm-Nd isotopic study: Further constraints for the Archean and Paleoproterozoic geodynamical evolution of the southeastern Guiana Shield north of Amazonian Craton, Brasil. Gondwana Research, Kochi, v.10, n., p.277-300, Kochi.
dc.identifier.urihttps://rigeo.cprm.gov.br/handle/doc/582
dc.description.abstractThe eastern part of the Guiana Shield, northern Amazonian Craton, in South America, represents a large orogenic belt developed during the Transamazonian orogenic cycle (2.26-1.95 Ga), which consists of extensive areas of Paleoproterozoic crust and two major Archean terranes: the Imataca Block, in Venezuela, and the here defined Amapá Block, in the north of Brazil. Pb-evaporation on zircon and Sm Nd on whole rock dating were provided on magmatic and metamorphic units from southwestern Amap¨¢ Block, in the Jari Domain, defining its long-lived evolution, marked by several stages of crustal accretion and crustal reworking. Magmatic activity occurred mainly at the Meso-Neoarchean transition (2.80-2.79 Ga) and during the Neoarchean (2.66-2.60 Ga). The main period of crust formation occurred during a protracted episode at the end of Paleoarchean and along the whole Mesoarchean (3.26-2.83 Ga)........ The lithological association and the available isotopic data registered in the Carecuru Domain suggests a geodynamic evolution model based on the development of a magmatic arc system during the Transamazonian orogenic cycle, which was accreted to the southwestern border of the Archean Amapá Block
dc.subjectGEOCRONOLOGIA
dc.subjectGEOQUÍMICA
dc.subjectPALEOPROTEROZOICO
dc.subjectOROGÊNESE
dc.subjectBRASIL
dc.subjectAMAZONAS
dc.titleZircon geochronology and Sm-Nd isotopic study: Further constraints for the Archean and Paleoproterozoic geodynamical evolution of the southeastern Guiana Shield north of Amazonian Craton, Brasil
dc.localKochi
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