Graphite and diamond formation via the interaction of iron carbide and Fe,Ni-sulfide under mantle P–T parameters

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

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Experimental research in the Fe3C–(Fe,Ni)S system was carried out. The objective of the investigation was to model the reactions of carbide–sulfide interaction related to graphite (diamond) formation in reduced lithosphere mantle domains. T ≤ 1200°C is the formation temperature of the Ni-cohenite + graphite assemblage coexisting with two immiscible melts such as sulfide (Fe60–Ni3–S37)L and metal–sulfide (Fe71–Ni7–S21–C1)L containing dissolved carbon. Т ≥ 1300°C is the generation temperature of a unified melt such as (Fe80–Ni6–S10–C4)L characterized by graphite crystallization and diamond growth. The extraction of carbide carbon during the interaction with the sulfide melt can be considered as one of the potential mechanisms of graphite and diamond formation in the reduced mantle.

Original languageEnglish
Pages (from-to)1144-1148
Number of pages5
JournalDoklady Earth Sciences
Volume471
Issue number1
DOIs
Publication statusPublished - 1 Nov 2016

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