2 Цитирования (Scopus)

Аннотация

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.

Язык оригиналаанглийский
Номер статьи734
Число страниц17
ЖурналMinerals
Том9
Номер выпуска12
DOI
СостояниеОпубликовано - дек 2019

Fingerprint Подробные сведения о темах исследования «Origin and evolution of high-mg carbonatitic and low-Mg carbonatitic to silicic high-density fluids in coated diamonds from Udachnaya Kimberlite pipe». Вместе они формируют уникальный семантический отпечаток (fingerprint).

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