Inclusions of crichtonite group minerals in pyropes from the Internatsionalnaya kimberlite pipe, Yakutia

• Published in: Doklady earth sciences Vol. 466; no. 2; pp. 206 - 209
• Main Authors: Rezvukhin, D. I., Malkovets, V. G., Sharygin, I. S., Kuzmin, D. V., Gibsher, A. A., Litasov, K. D., Pokhilenko, N. P., Sobolev, N. V.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-02-2016; Springer; Springer Nature B.V
• Subjects: Chromium; Earth and Environmental Science; Earth Sciences; Geochemistry; Kimberlite; Minerals; Yakutia Russia; Russia; Russia, Yakutia; South Africa; Kimberlite Pipe; DOKLADY Earth Science; Incompatible Element; Lithospheric Mantle; Siberian Craton
• ISSN: 1028-334X; 1531-8354
• DOI: 10.1134/S1028334X16020227

The results of study of crichtonite group minerals in pyropes from the Internatsionalnaya kimberlite pipe are reported. Most of the studied samples are characterized by high concentrations of Sr, Ca, Na, and LREEs in comparison with minerals of the LIMA series from kimberlites of South Africa, whereas the average concentrations of Ba and K are significantly lower. Crichtonite group minerals in pyropes are characterized by predomination of Na over K in most samples and by a high concentration of Al
2
O
3
(up to 4.5 wt %). Findings of inclusions of crichtonite group minerals with high concentrations of incompatible elements provide evidence for the metasomatic origin of host chromium-rich pyropes.