Iodine-xenon studies of Bjurbole and Parnallee using RELAX

J. D. Gilmour, R. D. Ash, R. Hutchison, J. C. Bridges, I. C. Lyon, G. Turner

    Research output: Contribution to journalArticlepeer-review


    Iodine-xenon analyses of chondrules from the Bjurbole 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 Bjurbole 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. A cristobalite-bearing chondrule depleted in 16O yields at I-Xe age of 4.5 ± 0.5 Ma after the mean Bjurbole age. -from Authors
    Original languageEnglish
    Pages (from-to)405-411
    Number of pages6
    Issue number4
    Publication statusPublished - 1995


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