Инд. авторы:	Chebotarev D.A., Veksler I.V., Wohlgemuth-Ueberwasser C., Doroshkevich A.G., Koch-Muller M.
Заглавие:	Experimental study of trace element distribution between calcite, fluorite and carbonatitic melt in the system CaCO3+CaF2+Na2CO3 +/- Ca-3(PO4)(2) at 100MPa
Библ. ссылка:	Chebotarev D.A., Veksler I.V., Wohlgemuth-Ueberwasser C., Doroshkevich A.G., Koch-Muller M. Experimental study of trace element distribution between calcite, fluorite and carbonatitic melt in the system CaCO3+CaF2+Na2CO3 +/- Ca-3(PO4)(2) at 100MPa // Contributions to Mineralogy and Petrology. - 2019. - Vol.174. - Iss. 1. - Art.4. - ISSN 0010-7999. - EISSN 1432-0967.
Идентиф-ры:	DOI: 10.1007/s00410-018-1530-x; РИНЦ: 38628795; SCOPUS: 2-s2.0-85059087006; WoS: 000453887700001;
Реферат:	eng: Here we present an experimental study of the distribution of a broad range of trace elements between carbonatite melt, calcite and fluorite. The experiments were performed in the CaCO3+CaF2+Na2CO3 +/- Ca-3(PO4)(2) synthetic system at 650-900 degrees C and 100MPa using rapid-quench cold-seal pressure vessels. Starting mixtures were composed of reagent-grade oxides, carbonates, Ca-3(PO4)(2) and CaF2 doped with 1 wt% REE-HFSE mixture. The results show that the distribution coefficients of all the analyzed trace elements for calcite and fluorite are below 1, with the highest values observed for Sr (0.48-0.8 for calcite and 0.14-0.3 for fluorite) and Y (0.18-0.3). The partition coefficients of REE gradually increase with increasing atomic number from La to Lu. The solubility of Zr, Hf, Nb and Ta in the synthetic F-rich carbonatitic melts, which were used in our experiments, is low and limited by crystallization of baddeleyite and Nb-bearing perovskite.
Ключевые слова:	SOLUBILITY; GPA; SOLIDUS; MINERALS; PERIDOTITE; MANTLE; GARNET LHERZOLITE; CAO-MGO-AL2O3-SIO2-CO2; SILICATE MELTS; Calcite; Fluorite; Partitioning; Trace elements; Distribution coefficients; Carbonatites; IMMISCIBLE CARBONATITE;
Издано:	2019
Физ. хар-ка:	4