Mathematics – Logic
Scientific paper
Sep 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979gecoa..43.1399a&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 43, Sept. 1979, p. 1399-1415.
Mathematics
Logic
18
Chondrites, Meteoritic Composition, Rare Gases, Abundance, Carbonaceous Chondrites, Fission, Isotopes
Scientific paper
Nine LL-chondrites were studied by selective etching to characterize the noble gas components in three mineral fractions: HF-HCl-solubles, chromite and carbon. The Ne-20/Ar-36 ratio is considered, noting that chondrites of different petrologic types cannot all be derived from the same volatile rich ancestor, but must have formed over a range of temperatures, with correspondingly different volatile contents. Variations in the carbonaceous chondrite fission (CCFXe) component in LL3, LL5, and LL6 chondrites are discussed, noting that if CCFXe comes from a supernova, then its distribution in LL-chondrites requires three presolar carrier minerals of the right solubility properties, containing three different xenon components. However, if CCFXe comes from fission of a volatile superheavy element, then its decrease from LL3 to LL6 can be attributed to less complete condensation from the solar nebula. Finally, the three types of primordial xenon components which occur in different minerals of the same meteorite are described.
Alaerts Leo
Anders Edward
Lewis Reed S.
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