![]() The Rb/Sr data indicate a Late Proterozoic metamorphic isotopic rehomogenization (930 Ma, Ro = 0.706). ![]() The magneritic- granitic suite is characterized by relatively high Fe/(Fe + Mg), K and HFS elements and low Ca contents, being comparable to typical anorogenic magneritic- granitic suites from Svcandinavia and North America. The textures of the mangerites and granites almost always show an important metamorphic overprinting, with relictic mesoperthite and pyroxene crystal into a granoblastic matrix. Hololeucocratic alkali feldspar granites are locally associated to the hornblende granites. exhibiting higher quartz and amphibole contents and lacking pyroxenes. The pink hornblende granitoids are mainly granite s.s. Petrographically the mangeritic rocks are mainly dark green quartz mangerites with mesoperthite, plagioclase, quartz, hypersthene, clinopyroxene and variable amounts of hornblende, with zircon as conspicuous acessory. Both the magnerites and hornblende granitoids present a tectonic foliation with mineral flattening and stretching. ![]() The country rocks correspond to a complex association of gneisses and migmatites, locally with granulite facies assemblages. ![]() In the Sao Jose do Rio Pardo region, Sao Paulo and Minas Gerais States, occur some intrusive, folded tabular bodies of mangerites associated with hornblende granitoids. International Nuclear Information System (INIS)Ĭampos Neto, M.C. The Sao Jose do Rio Pardo mangeritic- granitic suite, south eastern Brazil ![]()
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