Presencia de una anfibolita derivada de un MORB en el dominio Continental de la banda metamorfica de Aracena (Macizo Ibérico meridional)

Abstract

The La Corte Amphibolites are a part of the medium grade metamorphic series of the continental domain of the Aracena metamorphic belt (AMB). These amphibolites are rich in iron, as it is deduced from the abundance ofFe-rich amphiboles, includinggrunerites, and metallic minerals as well. Acording to different characteristics concerning structure, mineral chemistry and whole rock geochemistry, we can suggest that the La Corte amphibolites were not formed from the same protoUth that generated the Acebuches amphibolites, in the oceanic domain of the AMB. Multielemental and REE spidergrams allow as to conclude that the La Corte amphibolites formed from an oceanic crust whose characteristics are typical of those of a transitional oceanic basalt (T-MORB)