| Инд. авторы: | Vinogradova Y.G., Shatskiy A.F., Litasov K.D. |
| Заглавие: | Thermodynamic Analysis of Reactions of CO2 Fluid with Garnet and Clinopyroxene at 3-6 GPa |
| Библ. ссылка: | Vinogradova Y.G., Shatskiy A.F., Litasov K.D. Thermodynamic Analysis of Reactions of CO2 Fluid with Garnet and Clinopyroxene at 3-6 GPa // Geochemistry International. - 2021. - Vol.59. - Iss. 9. - P.851-857. - ISSN 0016-7029. - EISSN 1531-8397. |
| Внешние системы: | DOI: 10.1134/S0016702921080103; WoS: 000695549700003; |
| Реферат: | eng: Diamond-hosted inclusions provide information on the composition of the upper mantle. Many researchers found molecular CO2 inclusions, along with mineral and melt ones, in diamonds. Available experimental data on simplified systems suggest that CO2 fluid cannot occur in equilibrium with rock-forming mantle minerals. However, it was suggested that the complex composition of minerals contributes to their stabilization. This paper presents thermodynamic calculations for reactions of diopside-jadeite and pyrope-grossular solid solutions with CO2. It is shown that the formation of the solid solutions expands the stability field of CO2 fluid with eclogite minerals to lower temperatures, corresponding to the geothermal parameters of the continental lithosphere. The obtained relationships are confirmed by the results of preliminary experiments with model mixtures at high pressures and temperatures.
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| Ключевые слова: | DECARBONATION; PLACERS; DIAMONDS; INCLUSIONS; KIMBERLITE; EQUILIBRIUM; MANTLE; SYSTEM NA2CO3-CACO3-MGCO3; PHASE-RELATIONS; diamond; upper mantle; jadeite; diopside; grossular; pyrope; CO2 fluid; thermodynamic calculations; LHERZOLITE; |
| Издано: | 2021 |
| Физ. характеристика: | с.851-857 |