Evolução magmática dos granitóides proterozóicos do setor setentrional da província estrutural mantiqueira, Minas Gerais, Espírito Santo, Brasil - Mines Saint-Étienne
Article Dans Une Revue Special issue Revista Brasileira de Geociencias Année : 2000

Evolução magmática dos granitóides proterozóicos do setor setentrional da província estrutural mantiqueira, Minas Gerais, Espírito Santo, Brasil

Résumé

Neoproterozoic granitoid suites in southeastern Brazil are closely related to the different tectonic phases within the Brasiliano tectonic-thermal Event. Petrography, geochemistry and structural features allow to separate these rocks into pre-, syn-, late and post-tectonic granitoids. The whole emplacement process lasted about 100 Ma: from 595 Ma for the pre-tectonic granitoids, to near 490 Ma for the post-tectonic ones. During this interval a 45 Ma magmatic quiet period (from 582 to 537 Ma) can also be characterized. Detailed field observations and mapping, coupled with petrological and geochemical and observations, indicate the important role of the Archean and Paleoproterozoic crust in the genesis of these granitoids, showing even evidences of important mantle interactions.
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Dates et versions

emse-00613202 , version 1 (03-08-2011)

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  • HAL Id : emse-00613202 , version 1

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Essaid Bilal, Adolf Heinrich Horn, Hermínio Arias Nalini Jr., José Marques Correia-Neves, Fernando Machado de Mello. Evolução magmática dos granitóides proterozóicos do setor setentrional da província estrutural mantiqueira, Minas Gerais, Espírito Santo, Brasil. Special issue Revista Brasileira de Geociencias, 2000, 8 (1), pp.77-86. ⟨emse-00613202⟩
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