Abstract

Troctolitic sequence, divided into three major units. Oxygen isotope values confirm the chemical studies and indicate that major element assimilation is restricted to within approximately 10 m of country-rock inclusions. Pyrrhotite crystallization followed by separation of a Cu-rich sulfide melt, blending and partial crystallization of chemically similar magma, and enrichment of Cu in the final residual liquid.--Modified journal abstract.

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