Инд. авторы:	Sokol A.G., Kupriyanov I.N., Palyanov Y.N.
Заглавие:	Partitioning of H2O between olivine and carbonate-silicate melts at 6.3 GPa and 1400°C: Implications for kimberlite formation
Библ. ссылка:	Sokol A.G., Kupriyanov I.N., Palyanov Y.N. Partitioning of H2O between olivine and carbonate-silicate melts at 6.3 GPa and 1400°C: Implications for kimberlite formation // Earth and Planetary Science Letters. - 2013. - Vol.383. - P.58-67. - ISSN 0012-821X. - EISSN 1385-013X.
Внешние системы:	DOI: 10.1016/j.epsl.2013.09.030; SCOPUS: 2-s2.0-84885718308; WoS: 000328593500007;
Реферат:	eng: Partitioning of H2O between olivine and carbonate-silicate melts has been studied at 6.3 GPa and 1400°C using a split-sphere multianvil apparatus. Olivine was synthesized in equilibrium with hydrous silicate and hydrous carbonate-silicate±chloride melts saturated with respect to one of Opx, Grt, Ms or a harzburgitic (Ol+Opx+Grt) residue and had CO2/(CO2+SiO2) molar ratios from 0 to 0.8. The concentration of H2O in olivine was determined using FTIR spectroscopy. We found that depending on the melt carbonation and saturation in equilibrium silicate phases the H2O content in olivine varied from 100 to 1500 ppm. The obtained results and data reported in Sokol et al. (2013) indicate that H2O content in olivine becomes approximately two times lower as CO2/(CO2+SiO2) molar ratios in the equilibrium melt increases from 0 to 0.4-0.8 and the crystallization media transform from hydrous silicate to hydrous carbonate-silicate (kimberlite like) melt. The estimated water partitioning between carbonate-silicate melt and nominally anhydrous mantle minerals indicates that carbonatitic melt can effectively extract water once it invades H2O-poore the peridotite. We suggest that extraction of H2O owing to the freezing point depression may provide the necessary melting degree of metasomatized peridotite source and formation of kimberlitic magma. © 2013 Elsevier B.V.
Ключевые слова:	silicate melt; phase equilibrium; petrology; partitioning; partial melting; P-T conditions; olivine; kimberlite; FTIR spectroscopy; experimental mineralogy; carbonate; Volcanic rocks; Silicates; Olivine; Melting; Infrared spectroscopy; water; Chlorine compounds; Carbonation; Carbon dioxide; Water storage capacity; Water partitioning; Partial melting; Multi-anvil apparatus; Kimberlite; Hydrous silicate; FTIR spectroscopy; Freezing-point depression; Olivine water storage capacity; Kimberlite; IR spectroscopy; Hydrous partial melting; Fourier transform infrared spectroscopy;
Издано:	2013
Физ. характеристика:	с.58-67