TY JOUR TI Chalcophile metals in the formation processes of magma and the Earth core KW chalcophile metals KW formation processes of magma KW NMORB basalts quantitative model. JO Russian Journal of Earth Sciences AU Ryabchikov, I.D. AU Orlova, G.P. AU Babanskiy, A.D. AU Magazina, L.O. AU Tsepin, A.I. PY 1999 IS 1 PB Geophysical Center of the Russian Academy of Sciences