Origin of Archean ferropicrites: geochemical constraints from the Boston Creek Flow, Abitibi greenstone belt, Ontario, Canada

New major-element, trace-element and Nd isotope data for non-cumulate samples from the Fe-enriched Boston Creek Flow (BCF) have permitted the development of a petrogenetic model for the origin of this geochemically unusual flow. The data reveal high contents of Nb, Ta, LREE, Ti, Ni, Co and Ir, as well as in Fe, and low contents of Al (Al2O3TiO2 = 6), HREE, Y, V, Sc, Pd and Pt compared to komatiitic rocks and typical tholeiitic rocks of similar …