Инд. авторы:	Shchukina E.V., Afanasiev V.P., Lobov K.V., Malygina E.V., Pokhilenko N.P.
Заглавие:	New data on the composition of tagamites of the Popigai astrobleme
Библ. ссылка:	Shchukina E.V., Afanasiev V.P., Lobov K.V., Malygina E.V., Pokhilenko N.P. New data on the composition of tagamites of the Popigai astrobleme // Doklady Earth Sciences. - 2017. - Vol.473. - Iss. 1. - P.333-337. - ISSN 1028-334X. - EISSN 1531-8354.
Идентиф-ры:	DOI: 10.1134/S1028334X17030163; SCOPUS: 2-s2.0-85018893594; WoS: 000400358100017;
Реферат:	eng: New data on the composition of tagamites (impact melt rocks) of the Popigai atsrobleme (Siberia) are presented. The preliminary results support the following major conclusions: (1) the matrix of the studied tagamites is crystallized and is composed of identified minerals; (2) the degree of the matrix crystallization and the amount of inclusions in tagamites can vary significantly; (3) tagamites are identical to the intracrater gneisses of the Popigai astrobleme by the REE contents and are distinct from them by significantly lower SiO2 and higher Al2O3, FeO, MgO, and CaO contents; (4) the Popigai tagamites and intracrater gneisses are enriched in Ni (on average) in comparison with gneisses of the Khapchan Group; and (5) the various (often sufficient) degrees of crystallization of tagamites indicate the duration of the cooling of the melt, when diamonds could possibly have been dissolved. © 2017, Pleiades Publishing, Ltd.
Ключевые слова:	REE content; SIBERIA; Matrix algebra; astrobleme; chemical composition; crystallinity; Impact melt; Russian Federation; Popigai Crater; melt inclusion; melt; gneiss; crystallization; Diamond deposits;
Издано:	2017
Физ. хар-ка:	с.333-337