Interactions in the system [basalt-SO2-O2 ± S2]: A thermodynamic model

A thermodynamic model for gas-rock interactions in the system [basalt-SO 2 -O 2 ±S 2 ] is suggested. Calculations are performed for a wide range of temperatures (100–850°C) and pressures (1–1000 bars). The high-temperature part of this model was verified by experimental research, which was carried o...

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Bibliographic Details
Published in:Moscow University geology bulletin 2011-12, Vol.66 (6), p.413-422
Main Authors: Li, E. Yu, Grichuk, D. V., Shilobreeva, S. N., Chareev, D. A.
Format: Article
Language:English
Subjects:
Basalt
Earth and Environmental Science
Earth Sciences
Experimental research
Geology
Geophysics
High temperature
Low temperature
Mineralogy
Pyrite
Silicates
Sulfates
Sulfur dioxide
Thermodynamics
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Summary:A thermodynamic model for gas-rock interactions in the system [basalt-SO 2 -O 2 ±S 2 ] is suggested. Calculations are performed for a wide range of temperatures (100–850°C) and pressures (1–1000 bars). The high-temperature part of this model was verified by experimental research, which was carried out at 850, 650 and 450°C. The modeling prediction of interactions in the system [(alumino)silicates SO 2 -O 2 ±S 2 ] at relatively low temperatures (100–300°C) gives steady mineral associations that are typical for natural secondary quartzites: quartz-pyrite-hematite-Al-silicates-metal sulfates (Ca, Mg, Na, K, Al, and Fe). The formation of sulfates stabilizes the level of SO 2 concentration in the gas phase; this level falls with a temperature decrease.
ISSN:0145-8752
1934-8436
DOI:10.3103/S014587521106007X