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Geochemistry of the Rio Espinharas hybrid complex, northeastern Brazil
Campos, T. F. C.; Neiva, A. M. R.; Nardi, L. V. S.The Rio Espinharas pluton, northeastern Brazil, belongs to the shoshonitic series and consists mainly of syenogranite, quartz-monzonite and porphyritic quartz-monzonite, but diorite, quartz-monzodiorite, quartz-syenite and microsyenogranite also occur containing microgranular enclaves, except for the diorite. Most variation diagrams of rocks, amphiboles, biotites and allanites show linear trends, but K, Zr, Sr ...
Data: 2002
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Origem: Estudo Geral - Universidade de Coimbra
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