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Interaction of titanium minerals and their melts with diamond-forming media (experiments at 7-8 GPaстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 26 марта 2018 г.
- Авторы: Litvin Yu A., Bovkun A.V., Garanin V.K.
- Журнал: Geochemistry International
- Том: 56
- Номер: 2
- Год издания: 2018
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 148
- Последняя страница: 161
- DOI: 10.1134/S0016702918010032
- Аннотация: Melting relation in the multicomponent diamond-forming system of the upper mantle with a boundary of K=NaMg-Fe-Ca carbonate, phases of the mel peridotite and eclogite, carbon, and titanium minerals from kimberlite (ilmenite FeTiO3, perovskite CaTiO3, and rutile TiO2) were studied experimentally at 7-8 GPa and 1600-1650oC. Perovskite reacts with the formation of rutile in the diamond-forming silicate-carbonate melts. We disuvered liquid immiscibility between melts of titanium minerals, on the one hand, and carbonate-carbon, peridotite-carbonate-carbon, and eclogite-carbonate-carbon diamond-forming melts, on the other. The solubility of titanium minerals in diamond-forming melts is negligible independent of their concentration in the experimental systems. Growth melts retain high diamond-forming efficiency. In general, the experimental results are evidenced for the xenogenic nature of titanium minerals in inclusions in diamond and, therefore, in diamond-forming melts. It is shown that the physicochemical factors that may correlate the diamond content with the conentration of Ti in kimberlite do not occur during the diamond genesis in silicate-carbonate-carbon parental melts containing titanium minerals and their melts.
- Добавил в систему: Литвин Юрий Андреевич