Some chemical and isotopic observations in chondrules

Details Some chemical and isotopic observations in chondrules Some chemical and isotopic observations in chondrules

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985metic..20..347f&link_type=abstract

Meteoritics (ISSN 0026-1114), vol. 20, pt. 2, June 30, 1985, p. 347-357.

Computer Science

11

Abundance, Chemical Composition, Chondrites, Chondrule, Isotopes, Meteoritic Composition, Nitrogen, Olivine, Oxygen, Rare Gases, Solar System, Meteorites, Chemistry, Isotopes, Observations, Chondrules, Nitrogen, Rare Gases, Bjurbole, Dhajala, L Chondrites, H Chondrites, Chemistry, Systematics, Matrix, Formation, Fractionation, Element Ratios, Oxygen, Equilibration, Minerals, Ordinary Chondrites, Samples, Meteorite

Scientific paper

The authors report chemical, nitrogen and noble gas isotopic observations in individual chondrules of the Bjurböle (L4) and Dhajala (H3,4) chondrites. The δ15N is +9.4 for the Bjurböle "matrix", ranges from +6.4 to -20.0 in chondrules, and appears to be related to the chemical composition. Nitrogen isotope systematics seem to require the presence of more than one component of distinct signatures. Although the authors cannot rule out complex processes of chondrule and matrix formation involving element and isotope fractionations, the oxygen isotope systematics also seem to require distinct reservoirs. The authors discuss the results in terms of the lack of equilibrations among chondrule minerals, as well as with the host meteorite matter, and also the paradox of the constant Fe/Mg ratio of olivines in Bjurböle and of the majority of ordinary chondrites.

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