Abstract
The purpose of the publication is to estimate the fluid sources of the epithermal fluorite deposits of the Western Transbaikalia by analyzing the isotope composition of oxygen, carbon, hydrogen and sulfur. Methods. The isotopic compositions of oxygen in silicates as well as carbon in carbonates are determined by V.F. Posokhov in the Geological Institute SB RAS. Results. The isotopic composition of oxygen in quartz is characterized by low δ 18 O (-3.4 - + 2.6 ‰). Pyritic sulfer of these deposits is also enriched by the light isotope δ 34 S (from -1.8 to -7.7 ‰ δ 34 S). The value of δ 34 S varies from +0.4 to -9.7 ‰ and is -3.75 on the average for seven fields. Conclusions. The isotope studies indicate a deep source of sulfur, which underwent changes in the process of its rise from the magma pocket to the upper horizons. The composition of the fluid is indicative of the participation of water from the meteor source caused by recycling processes under the influence of shallow underlying basite pluton.
Highlights
Введение По запасам флюорита Россия занимает четвертое место в мире после Китая, Мексики и Южно-Африканской Республики, обладая 12,8 % балансовых запасов его промышленных категорий
The purpose of the publication is to estimate the fluid sources of the epithermal fluorite deposits of the Western Transbaikalia
well as carbon in carbonates are determined by V.F. Posokhov in the Geological Institute SB RAS
Summary
OF ISOTOPIC STUDY OF EPITHERMAL FLUORITE DEPOSITS OF WESTERN TRANSBAIKALIA (SOURCES OF MATTER AND FLUIDS).
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