Iodine-xenon studies of Bjurbole and Parnallee using RELAX

Details Iodine-xenon studies of Bjurbole and Parnallee using RELAX Iodine-xenon studies of Bjurbole and Parnallee using RELAX

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995metic..30..405g&link_type=abstract

Meteoritics, vol. 30, p. 405 (1995).

Computer Science

12

Scientific paper

Iodine-xenon analyses of chondrules from the Bjurböle L4 and Parnallee LL3.6 meteorites have been made using a continuous wave laser microprobe and the resonance ionisation mass spectrometer RELAX. The excess 129Xe content released from the Bjurböle chondrule is lower than previous stepped-heating studies have found, suggesting that the technique does not completely degas the samples. Nonetheless, clear isochrons were produced, and data for initial 129Xe/130Xe are consistent with earlier work. A correlation is evident in each chondrule between 131Xe* and 128Xe*, perhaps indicating a common host-phase for their parent nuclides, a condition possibly fulfilled by a Te- and I-bearing sulfide. The I-Xe system of a Parnallee macrochondrule exhibits no excess 129Xe, possibly as a result of thermal alteration or deformation before accumulation of the meteorite. A cristobalite-bearing chondrule depleted in 16O yields an I-Xe age of 4.5±.5 Ma after the mean Bjurböle age.

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