NEOPROTEROZOIC GRANITOID SUITES IN SOUTHEASTERN BRAZIL

Autor:	Bilal, Essaid, Horn, Adolf Heinrich, Nalini Júnior, Hermínio Arias, Mello, Fernando Machado de, Neves, José Marques Correia, Giret, Andre Roger, Moutte, Jaques, Fuzikawa, Kazuo, Fernandes, Maria Lourdes Souza
Rok vydání:	2000
Předmět:	Granitoids General Earth and Planetary Sciences Mantiqueira Structural Province
Zdroj:	Repositório Institucional da UFOP Universidade Federal de Ouro Preto (UFOP) instacron:UFOP
ISSN:	0375-7536
DOI:	10.25249/0375-7536.2000301051054
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::42a41ffccf28dfb9ced0089a24ca4119 https://doi.org/10.25249/0375-7536.2000301051054 Zobrazit plný text záznamu