Subducted continental crust: metamorphic control of decompression in the hind portion of the Aiuruoca-Andrelândia nappe, south-southwest border of São Francisco Craton, Minas Gerais

Metamorphic path constrained by metapelitic rocks from the inner Aiuruoca-Andrelândia nappe, south of the São Francisco craton, SE Brazil

“…The high Ca and Mn contents in garnet cores, free of MgChl and containing FeSt and Rt inclusions, suggest Eclogitic facies metabasic rocks occur as lenticular bodies intercalated in these metapelitic rocks. They show symplectitic texture between Omp -Ab/Olg -Qtz, and between Di and Hbl and, above all, coronitic ones between Pl and Grt (Campos Neto and Caby, 1999;Santos and Campos Neto, 2001). The metamorphic conditions rise to 695 8C -17 kbar (Trouw, 1992;Campos Neto and Caby, 1999; and represent the maximum pressure obtained for the Aiuruoca-Andrelândia nappe.…”