Инд. авторы:	Minin V.A., Prugov V.P., Podgornykh N.M., Kovyazin S.V., Kholodova L.D.
Заглавие:	Composition of chromites from kimberlites of the Botuobinskaya pipe in Yakutia
Библ. ссылка:	Minin V.A., Prugov V.P., Podgornykh N.M., Kovyazin S.V., Kholodova L.D. Composition of chromites from kimberlites of the Botuobinskaya pipe in Yakutia // Geology of Ore Deposits. - 2011. - Vol.53. - Iss. 7. - P.626-638. - ISSN 1075-7015. - EISSN 1555-6476.
Внешние системы:	DOI: 10.1134/S1075701511070130; SCOPUS: 2-s2.0-84855382851;
Реферат:	eng: A representative collection (138 analyses) of chromites from kimberlites of the Botuobinskaya pipe in Yakutia was studied. With allowance for the Cr, Ti, and Al contents, the chromites are subdivided into the low-Cr aluminous group A and the high-Cr and high-Ti group B. The chromites of group A with their compositional variations controlled by the Al 3+-Cr 3+ isomorphism are not related to kimberlite in composition and reveal attributes of restites. The chromites of group B with heterovalent Ti 4+ + Fe 2+ + Fe 3+-3Cr 3+ isomorphism vary in their composition in line with the compositional variations of kimberlites, thus demonstrating their primary magmatic origin. The chromites of the second group crystallized simultaneously with olivines from kimberlites, and both minerals could have formed nodules of spinel dunite. © 2011 Pleiades Publishing, Ltd.
Ключевые слова:	Sakha; Russian Federation; titanium; olivine; magmatism; kimberlite; dunite; chromium; chromite; chemical composition; Chromite deposits; Set theory; Olivine; Minerals; Chromite; Yakutia; Second group; Magmatic origin; In-line; Compositional variation; Al content;
Издано:	2011
Физ. характеристика:	с.626-638