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The study of weathering products of meteorites by means of evolved gas analysis
Author(s) -
Stelzner Th.,
Heide K.
Publication year - 1996
Publication title -
meteoritics and planetary science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.09
H-Index - 100
eISSN - 1945-5100
pISSN - 1086-9379
DOI - 10.1111/j.1945-5100.1996.tb02020.x
Subject(s) - meteorite , weathering , chondrite , mineralogy , geology , geochemistry , astrobiology , chemistry , physics
— Evolved gas analysis has been used to study the weathering of ordinary chondrites from Roosevelt County (western United States) and from the Sahara (Daraj, western Libya). An interpretation of the evolved gas analysis curves was possible by comparing the data measured on meteorites with the results of analysis on selected Fe minerals as well as chemically synthesised Fe compounds. The amount of H 2 O released over the temperature range from 25 °C to 400 °C, and the terrestrial age of the meteorites show a weak correlation. With a higher weathering grade (C,D) that is usually not any longer, H 2 is evolved >1300 °C, and O 2 is the dominant species in this temperature region. The amount of evolved CO 2 and SO 2 in different temperature ranges shows significant varieties between specimens from the two desert localities.