Search for nucleosynthetic and radiogenic tellurium isotope anomalies in carbonaceous chondrites

Maria Schonbachler, Manuela A. Fehr, Mark Rehkämper, Alex N. Halliday, Maria Schönbächler, Bodo Hattendorf, Detlef Günther

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Tellurium isotope data acquired by multiple-collector inductively coupled plasma-mass spectrometry (MC-ICPMS) are presented for sequential acid leachates of the carbonaceous chondrites Orgueil, Murchison, and Allende. Tellurium isotopes are produced by a broad range of nucleosynthetic pathways and they are therefore of particular interest given the isotopic anomalies previously identified for other elements in these meteorites. In addition, the data provide new constraints on the initial solar system abundance of the r-process nuclide 126Sn, which decays to 126Te with a half-life of 234,500 years. The 126Te/128Te ratios of all leachates were found to be identical, within uncertainty, despite variations in 124Sn/128Te of between about 0.002 and 1.4. The data define a 126Sn/124Sn ratio of
    Original languageEnglish
    Pages (from-to)3436-3448
    Number of pages12
    JournalGeochimica et Cosmochimica Acta
    Volume70
    Issue number13
    DOIs
    Publication statusPublished - 1 Jul 2006

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