| Инд. авторы: | Skuzovatov S., Zedgenizov D., Howell D., Griffin W.L. |
| Заглавие: | Various growth environments of cloudy diamonds from the Malobotuobia kimberlite field (Siberian craton) |
| Библ. ссылка: | Skuzovatov S., Zedgenizov D., Howell D., Griffin W.L. Various growth environments of cloudy diamonds from the Malobotuobia kimberlite field (Siberian craton) // Lithos. - 2016. - Vol.265. - P.96-107. - ISSN 0024-4937. - EISSN 1872-6143. |
| Внешние системы: | DOI: 10.1016/j.lithos.2016.04.013; SCOPUS: 2-s2.0-84964622024; WoS: 000389283300009; |
| Реферат: | eng: Microinclusions of high-density fluids (HDF's) occur in cloudy diamonds from the Mir and Internatsionalnaya kimberlite pipes (Malobotuobia kimberlite field, Siberian platform). These HDFs are of typical high-Mg carbonatitic composition; a few diamonds contain microinclusions that define a low-Mg carbonatitic to silicic trend. The observed variations are interpreted as resulted from mixing of two contrasting fluids derived from the partial melting mainly of carbonated peridotite (the high-Mg carbonatitic HDFs) and eclogite (silica-rich HDFs and HDFs with high Ca/(Ca + Mg + Fe)). Immiscibility of carbonatitic and silica-rich fluids provides a possible mechanism for the co-existence of the observed HDFs but needs further proof. The uniform carbon isotope composition of cloudy diamonds with high-Mg carbonatitic microinclusions from both kimberlite pipes implies a single peridotitic source. © 2016 Elsevier B.V.
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| Ключевые слова: | Hydrous-silicic high-density fluid; Eclogite; Peridotite; Carbonatite melt; Diamond; Microinclusions; |
| Издано: | 2016 |
| Физ. характеристика: | с.96-107 |