The genesis of the variscan ultramafic-hosted magmatic Cu-Ni deposit of aguablanca, SW spain

摘要

The Cu-Ni-rich Aguablanca deposit consits of two vertical lenses associated with ultramafic cumulates hosted by diorites in the composite and epizonal Variscan Santa Olalla Plutonic Complex. It is a synorogenic magmatic mineralization in which magmas ascended from a deep chamber forcefully carrying part of a stratiform complex, including the intercumulus sulphides. The isotope geochemistry (S, Pb, Nd, Sr) indicates that there was significant crustal contamination, which favoured the formation of immiscible magmatic sulphides in the deep chamber.