Инд. авторы:	Reutsky V.N., Palyanov Y.N., Wiedenbeck M.
Заглавие:	Carbon Isotope Composition of Diamond Crystals Grown Via Redox Mechanism
Библ. ссылка:	Reutsky V.N., Palyanov Y.N., Wiedenbeck M. Carbon Isotope Composition of Diamond Crystals Grown Via Redox Mechanism // Geochemistry International. - 2018. - Vol.56. - Iss. 13. - P.1398-1404. - ISSN 0016-7029. - EISSN 1531-8397.
Внешние системы:	DOI: 10.1134/S0016702918130074; SCOPUS: 2-s2.0-85059347141; WoS: 000454254900007;
Реферат:	eng: We report the carbon isotope compositions of a set of diamond crystals recovered from an investigation of the experimental interaction of metal iron with Mg-Ca carbonate at high temperature and high pressure. Despite using single carbon source with C-13 equal to +0.2 parts per thousand VPDB, the diamond crystals show a rangeof C-13 values from -0.5 to -17.1 parts per thousand VPDB. Diamonds grown in the metal-rich part of the system are relatively constant in their carbon isotope compositions (from -0.5 to -6.2 parts per thousand), whereas those diamonds recovered from the carbonate dominated part of the capsule show a much wider range of C-13 (from -0.5 to -17.1 parts per thousand). The experimentally observed distribution of diamond' C-13 using a single carbon source with carbon isotope ratio of marine carbonate is similar to that found in certain classes of natural diamonds. Our data indicate that the C-13 distribution in diamonds that resulted from a redox reaction of marine carbonate with reduced mantle material is hardly distinguishable from the C-13 distribution of mantle diamonds.
Ключевые слова:	MANTLE; FRACTIONATION; HIGH-PRESSURE; SIMS; subduction; ECLOGITES; carbon isotopes; redox crystallization; experiment; diamond; fractionation; CRYSTALLIZATION;
Издано:	2018
Физ. характеристика:	с.1398-1404