Инд. авторы:	Mikhailenko D.S., Korsakov A.V., Golovin A.V., Zelenovskiy P.S., Pohilenko N.P
Заглавие:	The first finding of graphite inclusion in diamond from mantle rocks: The result of the study of eclogite xenolith from Udachnaya pipe (Siberian craton)
Библ. ссылка:	Mikhailenko D.S., Korsakov A.V., Golovin A.V., Zelenovskiy P.S., Pohilenko N.P The first finding of graphite inclusion in diamond from mantle rocks: The result of the study of eclogite xenolith from Udachnaya pipe (Siberian craton) // Doklady Earth Sciences. - 2016. - Vol.469. - Iss. 2. - P.870-873. - ISSN 1028-334X. - EISSN 1531-8354.
Внешние системы:	DOI: 10.1134/S1028334X16080250; SCOPUS: 2-s2.0-84984904384; WoS: 000383030600022;
Реферат:	eng: A xenolith of eclogite from the kimberlite pipe Udachnaya–East, Yakutia Grt+Cpx+Ky + S + Coe/Qtz + Dia + Gr has been studied. Graphite inclusions in diamond have been studied in detail by Confocal Raman (CR) mapping. The graphite inclusion in diamond has a highly ordered structure and is characterized by a substantial shift in the band (about 1580 cm–1) by 7 cm–1, indicating a significant residual strain in the inclusion. According to the results of FTIR spectroscopic studies of diamond crystals, a high degree of nitrogen aggregation has been detected: it is present mainly in form A, which means an “ancient” age of the diamonds. In the xenolith studied, the diamond formation occurred about 1 Byr, long before their transport by the kimberlite melt, and the conditions of the final equilibrium were temperatures of 1020 ± 40°C at 4.7 GPa. Thus, these graphite inclusions found in a diamond are the first evidence of crystallization of metastable graphite in a diamond stability field. They were formed in rocks of the upper mantle significantly below (≥20 km) the graphite-diamond equilibrium line. © 2016, Pleiades Publishing, Ltd.
Ключевые слова:	Diamond deposits; Spectroscopic studies; Residual strains; Nitrogen aggregations; Highly ordered structure; Graphite inclusions; Equilibrium lines; Diamond stability; Diamond formation; Volcanic rocks; Spectroscopic analysis; Metamorphic rocks; Graphite; Diamonds;
Издано:	2016
Физ. характеристика:	с.870-873