RESULTS OF ISOTOPIC STUDY OF EPITHERMAL FLUORITE DEPOSITS OF WESTERN TRANSBAIKALIA (SOURCES OF MATTER AND FLUIDS)
https://doi.org/10.21285/2541-9455-2018-41-2-41-53
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 δ18O (-3.4 - + 2.6 ‰). Pyritic sulfer of these deposits is also enriched by the light isotope δ34S (from -1.8 to -7.7 ‰ δ34S). The value of δ34S 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.
About the Authors
E. Lastochkin
Geological Institute SB RAS
Russian Federation
Russian Federation
Candidate of Geological and Mineralogical Sciences, Researcher
tel.: 8 (3012) 433275
6a Sakhyanova St., Ulan-Ude, Republic of Buryatia, 670047, Russian Federation
G. Ripp
Geological Institute SB RAS
Russian Federation
Russian Federation
Candidate of Geological and Mineralogical Sciences, Leading Researcher
6a Sakhyanova St., Ulan-Ude, Republic of Buryatia, 670047, Russian Federation
D. Tsydenova
Geological Institute SB RAS
Russian Federation
Russian Federation
Postgraduate student
6a Sakhyanova St., Ulan-Ude, Republic of Buryatia, 670047, Russian Federation
V. Posokhov
Geological Institute SB RAS
Russian Federation
Russian Federation
Researcher
6a Sakhyanova St., Ulan-Ude, Republic of Buryatia, 670047, Russian Federation
A. Murzintseva
Buryat Scientific Center SB RAS
Russian Federation
Russian Federation
Engineer
8 Sakhyanova St., Ulan-Ude, Republic of Buryatia, 670047, Russian Federation
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Review
For citations:
Lastochkin E., Ripp G., Tsydenova D., Posokhov V., Murzintseva A. RESULTS OF ISOTOPIC STUDY OF EPITHERMAL FLUORITE DEPOSITS OF WESTERN TRANSBAIKALIA (SOURCES OF MATTER AND FLUIDS). Earth sciences and subsoil use. 2018;41(2):41-53. (In Russ.) https://doi.org/10.21285/2541-9455-2018-41-2-41-53
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