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Peritectic Reaction of Olivine in the Carbonate–Silicate–(C–O–H) Diamond-Forming System at 6 GPaстатья
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 10 апреля 2024 г.
- Авторы: Kuzyura A.V., Spivak A.V., Litvin Yu A.
- Журнал: Geochemistry International
- Том: 62
- Номер: 1
- Год издания: 2024
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 32
- Последняя страница: 44
- Аннотация: The influence of the components of supercritical C–O–H fluid (at a content of 7.5 wt %) on the melting relations in the multicomponent diamond-forming system olivine–jadeite–diopside–(Mg–Fe– Ca–Na carbonates)–(C–O–H) was studied experimentally at 6 GPa and 700–1200°C under the conditions of the upper mantle. The peritectic reaction of olivine and jadeite-bearing melt with the formation of garnet was suggested as a key mechanism for the ultramafic–mafic evolution of diamond-forming melts. The CO2 component of the C–O–H fluid reacts with silicate components to form carbonates. The H2O component, together with carbonate compounds of the diamond-forming system, reduces the temperature of its liquidus and solidus boundaries significantly. After the completion of crystallization of a completely miscible silicate–carbonate–(C–O–H fluid) melt, a phase of supercritical aqueous fluid and hydrous carbonate nesquehonite MgCO3·3H2O identified by Raman spectroscopy appear in the subsolidus of the diamond-forming system.
- Добавил в систему: Кузюра Анастасия Витальевна