Аннотация
Experimental studies of the Fe0–(Mg, Ca)CO3–S system were carried out during 18–20 h at 6.3 GPa, 900–1400°C. It is shown that the major processes resulting in the formation of free carbon include reduction of carbonates upon redox interaction with Fe0 (or Fe3C), extraction of carbon from iron carbide upon interaction with a sulfur melt/fluid, and reduction of the carbonate melt by Fe–S and Fe⎯S–C melts. Reconstruction of the processes of graphite formation indicates that carbonates and iron carbide may be potential sources of carbon under the conditions of subduction, and participation of the sulfur melt/fluid may result in the formation of mantle sulfides.
Язык оригинала | английский |
---|---|
Страницы (с-по) | 88-91 |
Число страниц | 4 |
Журнал | Doklady Earth Sciences |
Том | 466 |
Номер выпуска | 1 |
DOI | |
Состояние | Опубликовано - 1 янв 2016 |