WOLLASTONITA EM ASSOCIAÇÕES CÁLCICAS DE FÁCIES GRANULITO, CACONDE, SP

MARCOS AURÉLIO FARIAS DE OLIVEIRA, FRANCISCO RUBENS ALVES

Resumo


Wollastonit e-rich rocks are found inlerlayered with banded calcsilicate granulites, in the Caconde region, São Paulo, Brazil. The chief mineral componente of the former rocks, besides wollastonite, are: diopside, calcic plagioclase (bytownite), garnet, calcic scapolite, calcite and quartz. Although it is not a commonly cited mode of formation, field and petrographic data indicate that the wollastonite is a product of high grade regional metamorphism.


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