- PII
- S30345065S2686739725020112-1
- DOI
- 10.7868/S3034506525020112
- Publication type
- Article
- Status
- Published
- Authors
- Volume/ Edition
- Volume 520 / Issue number 2
- Pages
- 271-278
- Abstract
- Partial melting experiments of garnet-two-mica schist containing 0-20 wt. % graphite were carried out at 900°C and 500 MPa. Experiments have shown that at all graphite contents (within the specified range), metapelite melts are formed by peritectic melting reactions of biotite, muscovite and partly quartz: Bt + Ms + Qz → Kfs + Spl(Hc) + oAm + Sil + Gl. The decreasing Fe/(Fe+Fe) ratio in Fe-Mg minerals with increasing graphite content reflects increasing reducing conditions. Oxygen released as a result of the oxidation-reduction reactions of iron reacts with graphite to form CO. It partially dissolves in the melt to form carbonate complexes of Ca, Mg, K and accompanies it in the form of a free fluid phase. Experiments demonstrate that graphite-bearing metapelites can serve as efficient internal sources of CO during high-temperature metamorphism.
- Keywords
- графит расплав метапелиты углекислый флюид включения эксперимент
- Date of publication
- 29.12.2025
- Year of publication
- 2025
- Number of purchasers
- 0
- Views
- 67
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