Инд. авторы:	Shatskiy A., Litasov K.D., Sharygin I.S., Egonin I.A., Mironov A.M., Palyanov Y.N., Ohtani E.
Заглавие:	The system Na2CO3-CaCO3-MgCO3 at 6 GPa and 900-1250 degrees C and its relation to the partial melting of carbonated mantle
Библ. ссылка:	Shatskiy A., Litasov K.D., Sharygin I.S., Egonin I.A., Mironov A.M., Palyanov Y.N., Ohtani E. The system Na2CO3-CaCO3-MgCO3 at 6 GPa and 900-1250 degrees C and its relation to the partial melting of carbonated mantle // High Pressure Research. - 2016. - Vol.36. - Iss. 1. - P.23-41. - ISSN 0895-7959. - EISSN 1477-2299.
Внешние системы:	DOI: 10.1080/08957959.2015.1135916; SCOPUS: 2-s2.0-84959525343; WoS: 000371247800003;
Реферат:	eng: In order to constrain the Na2CO3-CaCO3-MgCO3 T-X diagram at 6 GPa in addition to the binary and pseudo-binary systems we conducted experiments along the Na2CO3-Ca0.5Mg0.5CO3 join. At 900-1000 degrees C, melting does not occur and isothermal sections are presented by one-, two- and three-phase regions containing Ca-bearing magnesite, aragonite, Na2CO3 (Na-2) and Na-2(Ca1-0.9Mg0-0.1)(3-4)(CO3)(4-5) (Na2Ca3-4), Na-4(Ca1-0.6Mg0-0.4)(CO3)(3) (Na4Ca), Na-2(Ca0-0.08Mg1-0.92)(CO3)(2) (Na2Mg) phases with intermediate compositions. The minimum melting point locates between 1000 degrees C and 1100 degrees C. This point would resemble that of three eutectics: Mgs-Na2Ca3-Na2Mg, Na2Mg-Na2Ca3-Na4Ca or Na2Mg-Na4Ca-Na-2, in the compositional interval of [45Na(2)CO(3)center dot 55(Ca0.6Mg0.4)CO3]-[60Na(2)CO(3)center dot 40Ca(0.6)Mg(0.4)CO(3)]. The liquidus projection has seven primary solidification phase regions for Mgs, Dol, Arg, Na2Ca3, Na4Ca, Na-2 and Na2Mg. The results suggest that extraction of Na and Ca from silicate to carbonate components has to decrease minimum melting temperature of carbonated mantle rocks to 1000-1100 degrees C at 6 GPa and yields Na-rich dolomitic melt with a Na# (Na2O/(Na2O + CaO + MgO)) >= 28 mol%.
Ключевые слова:	MAGNESITE; DIAMOND; SOLIDUS; KIMBERLITE; PERIDOTITE; PHASE-RELATIONS; UP KAWAI-CELL; 900-1450 DEGREES-C; HIGH-PRESSURE APPARATUS; Na2CO3-CaCO3-MgCO3 T-X diagram; carbonate-silicate reaction; high-pressure; partial melting of carbonated lherzolite; CAO-MGO-SIO2-CO2;
Издано:	2016
Физ. характеристика:	с.23-41