Experimental modeling of the interaction of subducted carbonates and sulfur with mantle silicates

Yu V. Bataleva, Yu N. Palyanov, Yu M. Borzdov, E. V. Zdrokov, N. V. Sobolev

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Experimental studies in the system Fe,Ni–olivine–carbonate–S (P = 6.3 GPa, T = 1050–1550°C, t = 40–60 h) aimed at modeling of the interaction of subducted carbonates and sulfur with rocks of the silicate mantle and at investigation of the likely mechanism of the formation of mantle sulfides were performed. It is shown that an association of olivine + orthopyroxene + magnesite + pyrite coexisting with a sulfur melt/fluid with dissolved Fe, Ni, and O is formed at T ≤ 1250°C. An association of low-Fe olivine, orthopyroxene, and magnesite and two immiscible melts of the carbonate and S–Fe–Ni–O compositions are formed at T ≥ 1350°C. It is shown that the reduced S-bearing fluids may transform silicates and carbonates, extract metals from the solid-phase matrix, and provide conditions for generation of sulfide melts.

Original languageEnglish
Pages (from-to)953-956
Number of pages4
JournalDoklady Earth Sciences
Volume470
Issue number1
DOIs
Publication statusPublished - 1 Sep 2016

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