Computer Science
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..307d&link_type=abstract
Lunar and Planetary Science, volume 27, page 307
Computer Science
3
Chondrules, Ion Probe, Isotopes: Hydrogen, Meteorites: Ll3, Precursors, Water: Contents
Scientific paper
Water contents and H isotopic compositions have been determined with the CRPG-Nancy ion microprobe in twelve chondrules (type I and type II after McSween's classification) from several deuterium-rich LL3 meteorites. The water concentration ranges from 500 to 17,000 ppm, with most of the data lying between 1000 and 5000 ppm and the dDSMOW values between -510 per mil and +1930 per mil (i.e. D/H ratios between 76 and 457 x 10^-6). Several spots were analysed in each chondrule to test their internal homogeneity. In an individual chondrule, the distribution of both water concentration and its isotopic composition could be either quite homogeneous, either extremely heterogeneous, but no systematic gradients were found. These ion microprobe measurements demonstrate that hydrogen bearing components (water and organics) were present in chondrule precursors.
Deloule Etienne
Robert Frédéric
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