Mathematics – Logic
Scientific paper
Aug 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010m%26ps...45.1380b&link_type=abstract
Meteoritics and Planetary Science, Volume 45, Issue 8, pp. 1380-1391.
Mathematics
Logic
Scientific paper
The Moss meteorite is the first CO chondrite fall after a time period of 70yr and the least terrestrially contaminated member of its group. Its cosmic-ray exposure (CRE) age (T3~13.5Ma T21~14.6Ma) is distinct among CO chondrites and, within witnessed falls is the shortest after Lancé, which we have reanalyzed. Gas retention ages are approximately 3.95×109yr (U/Th-He) and approximately 4.43×109yr (K/Ar), respectively. Trapped Ar, Kr, and Xe are present in Moss in abundances typical for CO chondrites, with ``planetary'' elemental and isotopic compositions. Presence of HL-xenon from presolar diamonds is observed in the stepwise release analysis of Lancé. It may also be present in Moss, but it is difficult to ascertain in single-step bulk analyses. It follows from our new data combined with a survey of the literature that the abundance of trapped gases in CO chondrites is not a good indicator of their petrological subtype.
Bartoschewitz Rainer
Bilet Morten
Franke Luitgard
Grau Thomas
Herrmann Siegfried
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