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ALMANDITIC GARNET-RICH METAMORPHIC ROCKS AS AN ORIGINAL SOIL DEVELOPED DU RING PRECAMBRIAN

1984; Sociedade Brasileira de Geologia; Volume: 14; Issue: 4 Linguagem: Inglês

10.25249/0375-7536.1984194202

ISSN

2177-4382

Autores

Shiguemi Fujimori, W. S. Fyfe,

Tópico(s)

Paleontology and Stratigraphy of Fossils

Resumo

The precambrian terrains of Salvador, Bahia, are made mainly of metamorphic rocks of very high grade (granulite facies) with more than 2.2 Ga in age. The main rock types are basic granulites and acid granulites, cut by small pegmatites, aplites and díabase dykes, Some of the acid granulites of Farol da Barra, Salvador, contaín almanditic gamet, sillimanite and cordierite. These mineral assemblages are consídered originally as residual soíl developed on basic granulites and this residual soíl was metamorphosed up to granulíte facies.

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