VARIAÇÃO MINERALÓGICA E POSSÍVEL GÊNESE DOS GNAISSES DO COMPLEXO SILVIANÓPOLIS, NORTE DE POUSO ALEGRE, (MG)

ROGÉRIO DE ARRUDA PENTEADO, ASIT CHOUDHURI

Resumo


Modal analyses of migmatites and gneisses of the Silvian6polis Complex reveal consistent variations in mineralogy with respect to quartz and feldspars and the location of these rocks in the field. These variations in conjunction with petrographic observations are taken to indicate the formation of the rocks by restricted anatexis of pre-existing basement gneisses.


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