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- Title
Influence of the Sulfur Concentration in a Fe-S Melt on Diamond Preservation under P-T Conditions of the Earth’s Mantle.
- Authors
Sonin, V. M.; Zhimulev, E. I.; Chepurov, A. A.; Chepurov, A. I.; Pokhilenko, N. P.
- Abstract
The results of experiments on dissolution of diamond in a Fe melt with variable concentrations of S at high P-T parameters are presented. It is established that the maximal degree of diamond dissolution occurs at a sulfur concentration of 15 wt %. With decreasing or increasing S content, dissolution of diamond slows down and almost does not occur during the period of the experiment (60 min), when the “eutectic” composition is gained. In contrast to a pure Fe melt, the presence of S decreases the carbon solubility and, therefore, reduces the aggressiveness of metal melt in relation to diamonds, thus, stimulating their preservation in the Earth’s mantle, especially if the concentration of S exceeds that in the “eutectic” composition.
- Subjects
DIAMONDS; SULFUR; EARTH'S mantle; CARBON; METALS
- Publication
Doklady Earth Sciences, 2018, Vol 481, Issue 1, p922
- ISSN
1028-334X
- Publication type
Article
- DOI
10.1134/S1028334X1807019X