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Article Dans Une Revue Special issue Revista Brasileira de Geociencias Année : 2000

The Neoproterozoic granitoid suites in South-eastern Brazil.

Résumé

Neoproterozoic granitoid suites in southeastern Brazil are closely related to the different tectonic events. Petrography, geochemistry and structural features allow to separate these rocks into pre-, syn-, late and post-tectonic granitoids. The whole emplacement process lasted less than 100 Ma: from 595 Ma for the pre-tectonic granitoids, to 500 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 observations, indicate an important role of the Archaean and Paleoproterozoic crust in the genesis of these granitoids, showing even evidences of some mantle interactions.
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Dates et versions

hal-01350692 , version 1 (01-08-2016)

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  • HAL Id : hal-01350692 , version 1

Citer

Essaïd Bilal, Adolf Heinrich Horn, Hermínio Arias Jr Nalini, Fernando Machado de Mello, José Marques Correia-Neves, et al.. The Neoproterozoic granitoid suites in South-eastern Brazil. . Special issue Revista Brasileira de Geociencias, 2000, 30 (1), pp.51-54. ⟨hal-01350692⟩
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