ENRICHMENT OF MASSIVE SULFIDES FROM THE SEMENOV HYDROTHERMAL CLUSTER (MID-ATLANTIC RIDGE) IN BARITE: A RESULT OF E-MORB INVOLVEMENT AND MAGMATIC CONTRIBUTION by I.Yu. Melekestseva, G.A. Tret’yakov, V.E. Beltenev

“…The presence of a significant amount of barite and a high Ba content of massive sulfides of the OCC-related fields link their formation with E-MORBs. Magmartic contribution for the formation of massive sulfides from some Semenov fields is supported by negative values of S isotopic composition of sulfides associated with barite, the presence of magmatic gases (CO2 and SO2) in Raman spectra of fluid inclusions in barite and the results of physicochemical modeling, which indicate the formation of barite-sulfide assemblage upon the interaction of E-MORBs, seawater, and magmatic gas. …”
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