Инд. авторы:	Gubanov N., Zedgenizov D., Sharygin I., Ragozin A.
Заглавие:	Origin and Evolution of High-Mg Carbonatitic and Low-Mg Carbonatitic to Silicic High-Density Fluids in Coated Diamonds from Udachnaya Kimberlite Pipe
Библ. ссылка:	Gubanov N., Zedgenizov D., Sharygin I., Ragozin A. Origin and Evolution of High-Mg Carbonatitic and Low-Mg Carbonatitic to Silicic High-Density Fluids in Coated Diamonds from Udachnaya Kimberlite Pipe // MINERALS. - 2019. - Vol.9. - Iss. 12. - Art.734.
Внешние системы:	DOI: 10.3390/min9120734; РИНЦ: 42933614; РИНЦ: 43208391; WoS: 000506636900018;
Реферат:	eng: Microinclusions of high-density fluids (HDFs) were studied in coated diamonds from the Udachnaya kimberlite pipe (Siberian craton, Russia). The presence of C-centers in the coats testifies to their formation shortly before kimberlite eruption, whereas the cores have much longer mantle residence in chemically different mantle substrates, i.e., peridotite-type (P-type) and eclogite-type (E-type). The carbon isotope composition indicates an isotopically homogeneous carbon source for coats and a heterogeneous source for cores. Microinclusions in the coats belong to two groups: high-Mg carbonatitic and low-Mg carbonatitic to silicic. A relationship was found between high-Mg carbonatitic HDFs and peridotitic host rocks and between low-Mg carbonatitic to silicic and eclogites. The composition of high-Mg carbonatitic HDFs with a "planed" trace-element pattern can evolve to low-Mg carbonatitic to silicic during percolation through different mantle rocks. The compositional variations of microinclusions in the coats reflect this evolution.
Ключевые слова:	INCLUSIONS; MANTLE; FORMING FLUIDS; NITROGEN AGGREGATION; ISOTOPE FRACTIONATION; EAST KIMBERLITE; FIBROUS DIAMONDS; YAKUTIA; mantle; HDFs; microinclusions; carbon isotope composition; nitrogen; diamond; INFRARED-ABSORPTION; MELT;
Издано:	2019
Физ. характеристика:	734