Experimental Study of the Product Composition of the Chelyabinsk Meteorite (LL5) Outgassing
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The Chelyabinsk meteorite sample of type LL5 was subjected to calcination in the specially constructed instrument in the temperature range 200–800°C in increments of 100°C. The composition of the obtained volatile constituents was examined on a chromatograph. Detected were: CO2, H2O, and N2 in concentrations of 5–40 μg/g of the sample; H2, CO, CH4, and H2S in concentrations of 0.1–2.0 μg/g. By observing changes in the selected component concentrations over time (up to 90 minutes), it was concluded that chemical reactions in the system between volatile components occur directly during outgassing.
Keywordsmeteorite, outgassing early atmosphere gas chromatography
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The study was supported by the Russian Science Foundation (project no. 17-17-01279).
The authors are deeply grateful to Yakovlev Oleg Ivanovich for providing a sample of the Chelyabinsk meteorite, as well as for constructive comments when writing this work.
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