Sulfide phases in the Earth's mantle and the behavior of chalcophile elements

The concentration of sulfur in the silicate Earth is estimated based on qua ntitative models for the generation of basalts of the NMORN type in the cou rse of the polybaric dynamic melting of a pyrolite source. Additional infor mation is obtained by comparing the concentrations of chalcophile metals in mantle peridotites and basalts with the behavior of these elements during the partial melting of sulfide-bearing peridotite. The sulfur concentration in the Earth's mantle is estimated at 300 ppm.