Инд. авторы: | Bataleva Y.V., Palyanov Y.N., Borzdov Y.M., Bayukov O.A., Sobolev N.V. |
Заглавие: | Interaction of iron carbide and sulfur under P-T conditions of the lithospheric mantle |
Библ. ссылка: | Bataleva Y.V., Palyanov Y.N., Borzdov Y.M., Bayukov O.A., Sobolev N.V. Interaction of iron carbide and sulfur under P-T conditions of the lithospheric mantle // Doklady Earth Sciences. - 2015. - Vol.463. - Iss. 1. - P.707-711. - ISSN 1028-334X. - EISSN 1531-8354. |
Внешние системы: | DOI: 10.1134/S1028334X15070077; РИНЦ: 23995740; SCOPUS: 2-s2.0-84938503566; WoS: 000358795300012; |
Реферат: | eng: Experimental studies were performed in the Fe3C-S system at P = 6.3 GPa, T = 900-1600A degrees C, and t = 18-20 h. The study aimed to characterize the conditions of iron carbide stability in a reduced lithospheric mantle and to reveal the possibility of the formation of elemental carbon by the interaction of iron carbide and sulfur. It was found that the reaction at T < 1200A degrees C proceeds with the formation of a pyrrhotite-graphite assemblage by the following scheme: 2Fe(3)C + 3S(2) -> 6FeS + 2C(0). The crystallization of graphite at T < 1200A degrees C is accompanied by the generation of sulfide and metal-sulfide melts and via 2Fe(3)C + 3S(2) -> 6[Fe-S-(melt) + Fe-S-C-(melt)] + 2C ((graphite)) (0) reaction. Resulting from the carbon-generating reactions, not only graphite crystallized in sulfide or metal-sulfide melts, but the growth of diamond also takes place. The obtained data allow one to consider cohenite as a potential source of carbon in the processes of diamond and graphite crystallization under the conditions of a reduced lithospheric mantle. The interaction of iron carbide and sulfur under which carbon extraction proceeds may be one of possible processes of the global carbon cycle.
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Ключевые слова: | CORES; EVOLUTION; CARBON; DIAMOND; MINERAL INCLUSIONS; |
Издано: | 2015 |
Физ. характеристика: | с.707-711 |