Инд. авторы:	Litasov K.D., Shatskiy A.F., Pal'yanov Yu.N, Sokol A.G., Katsura T., Ohtani E.
Заглавие:	Hydrogen incorporation into forsterite in Mg2SiO4-K2Mg(CO3)2-H2O and Mg2SiO4-H2O-C at 7.5-14.0 GPa
Библ. ссылка:	Litasov K.D., Shatskiy A.F., Pal'yanov Yu.N, Sokol A.G., Katsura T., Ohtani E. Hydrogen incorporation into forsterite in Mg2SiO4-K2Mg(CO3)2-H2O and Mg2SiO4-H2O-C at 7.5-14.0 GPa // Russian Geology and Geophysics. - 2009. - Vol.50. - Iss. 12. - P.1129-1138. - ISSN 1068-7971. - EISSN 1878-030X.
Внешние системы:	DOI: 10.1016/j.rgg.2009.11.011; SCOPUS: 2-s2.0-70449787645;
Реферат:	eng: Experiments on water solubility in forsterite in the systems Mg2SiO4-K2Mg(CO3)2-H2O and Mg2SiO4-H2O-C were conducted at 7.5-14.0 GPa and 1200-1600 °C. The resulting crystals contain 448 to 1480 ppm water, which is 40-70% less than in the forsterite-water system under the same conditions. This can be attributed to lower water activity in the carbonate-bearing melt. The water content of forsterite was found to vary systematically with temperature and pressure. For instance, at 14 GPa in the system forsterite-carbonate-H2O the H2O content of forsterite drops from 1140 ppm at 1200 °C to 450 ppm at 1600 °C, and at 8 GPa it remains constant or increases from 550 to 870 ppm at 1300-1600 °C. Preliminary data for D-H-bearing forsterite are reported. Considerable differences were found between IR spectra of D-H- and H-bearing forsterite. The results suggest that CO2 can significantly affect the width of the olivine-wadsleyite transition, i.e., the 410-km seismic discontinuity, which is a function of the water content of olivine and wadsleyite. © 2009.
Ключевые слова:	water; wadsleyite; upper mantle; temperature effect; solubility; pressure effect; olivine; mantle chemistry; hydrogen; forsterite; water content; crystal structure; carbonate rock; carbon dioxide; carbon; water; upper mantle; forsterite; fluid; carbonate; carbon; experimental study;
Издано:	2009
Физ. характеристика:	с.1129-1138