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Russian Geology and Geophysics

2009 year, number 7

Thermodynamic modeling of the REE distribution between fluorite and ore-forming fluid in postmagmatic deposits in western Transbaikalia

K.G. Morgunov a , V.G. Bykova b
a Sobolev Institute of Geology and Mineralogy, Siberian Branch of the RAS, 3 prosp. Akad. Koptyuga, Novosibirsk, 630090, Russia
b Novosibirsk State University, 2 ul. Pirogova, Novosibirsk, 630090, Russia
Keywords: computer modeling; REE fractionation; thermodynamic calculations; epithermal fluorite deposits of western Transbaikalia
Pages: 595-601


The factors determining the REE distribution in natural hydrothermal systems are studied by a numerical experiment. The behavior of REE is examined based on the composition of ore-bearing hydrothermal solutions and the parameters of ore formation processes at different fluorite deposits. These data were obtained in studies of fluid inclusions. Some regularities of the REE behavior during the formation of fluorite deposits have been revealed. It is shown that the REE distribution in fluorites is related mainly to changes in the composition of mineral-producing fluid solution.