Abstract
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 Al2O3 (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.
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Original Russian Text © D.I. Rezvukhin, V.G. Malkovets, I.S. Sharygin, D.V. Kuzmin, A.A. Gibsher, K.D. Litasov, N.P. Pokhilenko, N.V. Sobolev, 2016, published in Doklady Akademii Nauk, 2016, Vol. 466, No. 6, pp. 714–717.
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Rezvukhin, D.I., Malkovets, V.G., Sharygin, I.S. et al. Inclusions of crichtonite group minerals in pyropes from the Internatsionalnaya kimberlite pipe, Yakutia. Dokl. Earth Sc. 466, 206–209 (2016). https://doi.org/10.1134/S1028334X16020227
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DOI: https://doi.org/10.1134/S1028334X16020227