The first finding of graphite inclusion in diamond from mantle rocks: The result of the study of eclogite xenolith from Udachnaya pipe (Siberian craton) / Mikhailenko D. S.,Korsakov A. V.,Golovin A. V.,Zelenovskiy P. S.,Pohilenko N. P. // DOKLADY EARTH SCIENCES. - 2016. - V. 469, l. 2. - P. 870-873.

ISSN/EISSN:

1028-334X / 1531-8354

Type:

Article

Abstract:

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 +/- 40A degrees 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 (aeyen20 km) the graphite-diamond equilibrium line.

Author keywords:

PRESSURE

DOI:

10.1134/S1028334X16080250

Web of Science ID:

ISI:000383030600022

Соавторы в МНС:

Другие поля

Поле	Значение
Month	AUG
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
EISSN	1531-8354
Keywords-Plus	PRESSURE
Research-Areas	Geology
Web-of-Science-Categories	Geosciences, Multidisciplinary
Author-Email	pazilovdenis@igm.nsc.ru
ResearcherID-Numbers	Zelenovskiy, Pavel/L-7480-2016 Korsakov, Andrey/O-2390-2013 Denis, Mikhaylenko/A-8375-2014 Golovin, Alexander/A-7090-2014
ORCID-Numbers	Zelenovskiy, Pavel/0000-0003-3895-4785 Korsakov, Andrey/0000-0002-4922-7658 Denis, Mikhaylenko/0000-0003-0585-3021
Funding-Acknowledgement	grant RSF from the Russian Science Foundation {[}15-17-30012]; Ministry of Education and Science of the Russian Federation {[}RFMEFI59414X0011]
Funding-Text	The study was supported by grant RSF No 15-17-30012 from the Russian Science Foundation and was carried out using the equipment of the Ural Center of Shared Use ``Modern Nanotechnologies{''} supported by the Ministry of Education and Science of the Russian Federation (unique identifier RFMEFI59414X0011).
Number-of-Cited-References	15
Usage-Count-Since-2013	2
Journal-ISO	Dokl. Earth Sci.
Doc-Delivery-Number	DV6GJ