Инд. авторы:	Smirnov S.Z., Thomas V.G., Kamenetsky V.S., Kozmenko O.A., Large R.R.
Заглавие:	Hydrosilicate liquids in the system Na 2O-SiO 2-H 2O with NaF, NaCl and Ta: Evaluation of their role in ore and mineral formation at high T and P
Библ. ссылка:	Smirnov S.Z., Thomas V.G., Kamenetsky V.S., Kozmenko O.A., Large R.R. Hydrosilicate liquids in the system Na 2O-SiO 2-H 2O with NaF, NaCl and Ta: Evaluation of their role in ore and mineral formation at high T and P // Petrology. - 2012. - Vol.20. - Iss. 3. - P.271-285. - ISSN 0869-5911. - EISSN 1556-2085.
Внешние системы:	DOI: 10.1134/S0869591112020063; SCOPUS: 2-s2.0-84861210304;
Реферат:	eng: Consideration of the existence of hydrosilicate liquids (HSL) in nature can help in understanding the accumulation and transport of some mineral- and ore-forming components at the transition from magmas to hydrothermal fluids. We studied the experimental formation of HSL using a base system Na 2O-SiO 2-H 2O with addition of NaF, NaCl and metallic Ta. The interaction between quartz and aqueous solution, performed at 1. 5 kbar and 600°C and followed either by cooling or by quench, showed that the formation of HSL occurred when initial Na 2O exceeded 2 wt %. Neither NaF nor NaCl have a significant effect on the formation of HSL. The HSL concentrates F, whereas Cl partitions into the aqueous fluid. With addition of Ta to the system, the HSL becomes metal-enriched. Natural analogs of experimental HSL can be found among 'melt/fluid' inclusions entrapped in quartz and other minerals of miaroles in granite pegmatites and raremetal granites. The HSL is a novel medium enabling extreme concentrations of lithophile ore metals at the magmatic-hydrothermal transition. © 2012 Pleiades Publishing, Ltd.
Издано:	2012
Физ. характеристика:	с.271-285