| Инд. авторы: | Bataleva Y.V., Palyanov Y., Borzdov Y. |
| Заглавие: | Sulfide Formation as a Result of Sulfate Subduction into Silicate Mantle (Experimental Modeling under High P,T-Parameters) |
| Библ. ссылка: | Bataleva Y.V., Palyanov Y., Borzdov Y. Sulfide Formation as a Result of Sulfate Subduction into Silicate Mantle (Experimental Modeling under High P,T-Parameters) // MINERALS. - 2018. - Vol.8. - Iss. 9. - Art.373. - ISSN 2075-163X. |
| Идентиф-ры: | DOI: 10.3390/min8090373; РИНЦ: 35791868; SCOPUS: 2-s2.0-85052616624; WoS: 000447939100013; |
| Реферат: | eng: Ca,Mg-sulfates are subduction-related sources of oxidized S-rich fluid under lithospheric mantle P,T-parameters. Experimental study, aimed at the modeling of scenarios of S-rich fluid generation as a result of desulfation and subsequent sulfide formation, was performed using a multi-anvil high-pressure apparatus. Experiments were carried out in the Fe,Ni-olivine-anhydrite-C and Fe,Ni-olivine-Mg-sulfate-C systems (P = 6.3 GPa, T of 1050 and 1450 degrees C, t = 23-60 h). At 1050 degrees C, the interaction in the olivine-anhydrite-C system leads to the formation of olivine + diopside + pyrrhotite assemblage and at 1450 degrees C leads to the generation of immiscible silicate-oxide and sulfide melts. Desulfation of this system results in the formation of S-rich reduced fluid via the reaction olivine + anhydrite + C -> diopside + S + CO2. This fluid is found to be a medium for the recrystallization of olivine, extraction of Fe and Ni, and subsequent crystallization of Fe,Ni-sulfides (i.e., olivine sulfidation). At 1450 degrees C in the Ca-free system, the generation of carbonate-silicate and Fe,Ni-sulfide melts occurs. Formation of the carbonate component of the melt occurs via the reaction Mg-sulfate + C -> magnesite + S. It is experimentally shown that the olivine-sulfate interaction can result in mantle sulfide formation and generation of potential mantle metasomatic agents-S- and CO2-dominated fluids, silicate-oxide melt, or carbonate-silicate melt. |
| Ключевые слова: | S-rich fluid; sulfide; MELTS; ZONES; REDUCED S; REDOX BUDGET; EARTHS MANTLE; DIAMOND FORMATION; HIGH-TEMPERATURE; HIGH-PRESSURE; SULFUR-CARBON SYSTEM; lithospheric mantle; mantle metasomatism; subduction; high-pressure experiment; desulfation; sulfidation; LITHOSPHERIC MANTLE; sulfate; |
| Издано: | 2018 |
| Физ. хар-ка: | 373 |
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