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Campo DC | Valor | Idioma |
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dc.contributor.author | ROSA-COSTA, Lúcia Travassos da | |
dc.contributor.author | LAFON, Jean-Michel | |
dc.contributor.author | DELOR, Claude | |
dc.date.accessioned | 2013-12-19T16:32:44Z | |
dc.date.available | 2013-12-19T16:32:44Z | |
dc.date.issued | 2006 | |
dc.identifier.citation | ROSA-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.uri | https://rigeo.sgb.gov.br/handle/doc/582 | |
dc.description.abstract | The 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.language | en | |
dc.subject | GEOCRONOLOGIA | |
dc.subject | GEOQUÍMICA | |
dc.subject | PALEOPROTEROZOICO | |
dc.subject | OROGÊNESE | |
dc.subject | BRASIL | |
dc.subject | AMAZONAS | |
dc.title | 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 | |
dc.type | Article | - |
dc.local | Kochi | |
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