Inclusions of Cr- and Cr–Nb-Rutile in pyropes from the Internatsionalnaya kimberlite pipe, Yakutia

The results of study of rutile inclusions in pyrope from the Internatsionalnaya kimberlite pipe are presented. Rutile is characterized by unusually high contents of impurities (up to 25 wt %). The presence of Cr 2 O 3 (up to 9.75 wt %) and Nb 2 O 5 (up to 15.57 wt %) are most typical. Rutile inclusi...

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Bibliographic Details
Published in:Doklady earth sciences 2016-02, Vol.466 (2), p.173-176
Main Authors: Rezvukhin, D. I., Malkovets, V. G., Sharygin, I. S., Kuzmin, D. V., Litasov, K. D., Gibsher, A. A., Pokhilenko, N. P., Sobolev, N. V.
Format: Article
Language:English
Subjects:
Crystallization
Earth and Environmental Science
Earth Sciences
Geochemistry
Kimberlite
Lithosphere
Minerals
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Summary:The results of study of rutile inclusions in pyrope from the Internatsionalnaya kimberlite pipe are presented. Rutile is characterized by unusually high contents of impurities (up to 25 wt %). The presence of Cr 2 O 3 (up to 9.75 wt %) and Nb 2 O 5 (up to 15.57 wt %) are most typical. Rutile inclusions often occur in assemblage with Ti-rich oxides: picroilmenite and crichtonite group minerals. The Cr-pyropes with inclusions of rutile, picroilmenite, and crichtonite group minerals were formed in the lithospheric mantle beneath the Mirnyi field during their joint crystallization from melts enriched in Fe, Ti, and other incompatible elements as a result of metasomatic enrichment of the depleted lithospheric mantle.
ISSN:1028-334X
1531-8354
DOI:10.1134/S1028334X1602015X