Инд. авторы:	Shatskii V.S, Zedgenizov D.A., Ragozin A.L., Kalinina V.V., Reutskii V.N.
Заглавие:	Local variations in carbon isotopes and nitrogen contents in diamonds from placers of the northeastern portion of the Siberian Platform
Библ. ссылка:	Shatskii V.S, Zedgenizov D.A., Ragozin A.L., Kalinina V.V., Reutskii V.N. Local variations in carbon isotopes and nitrogen contents in diamonds from placers of the northeastern portion of the Siberian Platform // Doklady Earth Sciences. - 2011. - Vol.440. - Iss. 1. - P.1282-1286. - ISSN 1028-334X. - EISSN 1531-8354.
Внешние системы:	DOI: 10.1134/S1028334X11090108; SCOPUS: 2-s2.0-80053987224;
Реферат:	eng: Variations in the isotopic composition of carbon and the nitrogen contents in diamonds from placers of the northeastern portion of the Siberian Platform have been examined. The results obtained indicate that there is no correlation between local variations in the isotopic composition of carbon and the nitrogen content and the degree of nitrogen aggregation. It has been demonstrated that changes in oxygen fugacity in the course of the growth of diamonds of the V variety do not affect the isotopic composition of carbon. The nature of the variations in the isotopic composition of carbon and the nitrogen contents indicate that there were at least two sources of carbon. The sources of lightweight and weighted compositions of carbon in the diamonds could be organic carbon and carbon in marine carbonates of the subducted crust of the Earth, respectively. Mantle carbon was involved in the diamond formation process at the final stages of the growth. © 2011 Pleiades Publishing, Ltd.
Ключевые слова:	Diamond formation; Isotopic composition; Local variations; Marine carbonates; Nitrogen content; Oxygen fugacity; Siberian platform; Two sources; Diamonds; Isotopes; Nitrogen; Organic carbon; aggregation; carbon isotope; diamond; fugacity; isotopic composition; nitrogen; organic carbon; Russian Federation; Carbon isotopes; Siberian Platform;
Издано:	2011
Физ. характеристика:	с.1282-1286