Инд. авторы:	Kagi H., Zedgenizov D.A., Ohfuji H., Ishibashi H.
Заглавие:	Micro- and nano-inclusions in a superdeep diamond from São Luiz, Brazil
Библ. ссылка:	Kagi H., Zedgenizov D.A., Ohfuji H., Ishibashi H. Micro- and nano-inclusions in a superdeep diamond from São Luiz, Brazil // Geochemistry International. - 2016. - Vol.54. - Iss. 10. - P.834-838. - ISSN 0016-7029. - EISSN 1531-8397.
Внешние системы:	DOI: 10.1134/S0016702916100062; SCOPUS: 2-s2.0-84990940868; WoS: 000385196900002;
Реферат:	eng: We report cloudy micro- and nano-inclusions in a superdeep diamond from São-Luiz, Brazil which contains inclusions of ferropericlase (Mg, Fe)O and former bridgmanite (Mg, Fe)SiO3 and ringwoodite (Mg, Fe)2SiO4. Field emission-SEM and TEM observations showed that the cloudy inclusions were composed of euhedral micro-inclusions with grain sizes ranging from tens nanometers to submicrometers. Infrared absorption spectra of the cloudy inclusions showed that water, carbonate, and silicates were not major components of these micro- and nano-inclusions and suggested that the main constituent of the inclusions was infrared-inactive. Some inclusions were suggested to contain material with lower atomic numbers than that of carbon. Mineral phase of nano- and micro-inclusions is unclear at present. Microbeam X-ray fluorescence analysis clarified that the micro-inclusions contained transition metals (Cr, Mn, Fe, Co, Ni, Cu, Zn) possibly as metallic or sulfide phases. The cloudy inclusions provide an important information on the growth environment of superdeep diamonds in the transition zone or the lower mantle. © 2016, Pleiades Publishing, Ltd.
Ключевые слова:	Transition zones; Submicrometers; Nano inclusion; Microbeam X-ray fluorescence; Micro-inclusion; Lower mantle; Field emission SEM; Ferropericlase; Zinc sulfide; Water absorption; Transition metals; Silicates; Diamond deposits; Light absorption; Fourier transform infrared spectroscopy; Fluorescence; Diamonds; Copper; Carbon; Atoms; superdeep diamond; nano-inclusion; micro-inclusion; lower mantle; Manganese;
Издано:	2016
Физ. характеристика:	с.834-838