ESTUDO LITOGEOQUÌMICO DOS GRANITÓIDES DO NORTE DO MATO GROSSO (BRASIL), LITOGÊNESE DO SISTEMA PLUTÔNICO GRANÍTICO PÓS-COLISIONAL A INTRAPLACA NA PORÇÃO SUL DO CRÁTON AMAZÔNICO.
DOI:
https://doi.org/10.21715/GB2358-2812.2018321062Abstract
Através do estudo de litogeoquímica dos granitos localizados no norte do Mato Grosso (Brasil) permitiu identificar características geoquímicas, em relação aos elementos menores e maiores, de séries magmáticas cálcio-alcalina alto K, semelhantes aos granitos tipo A2, possivelmente com origem mantélica contaminado por elementos crustais. A assinatura geoquímica assemelha-se aos granitos de sistemas Pós-colisionais a Pós-orogênicos, alguns tendendo para características geoquímicas de ambiente de sistemas Intraplaca a Anorogênicos. As idades geocronológicas U-Pb situam-se entre o Orosiriano (Paleoproterozóico) até o Calimiano (Mesoproterozoico) e em função da distribuição multielementar e o padrão de elementos terras raras, aplicando-se vários modelos discriminantes, estes apresentam uma mesma origem ou fonte primordial para estas granitogêneses.
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