Isotope fractionation of neon during stepheating extraction?

A comment on 'Re-interpretation of the existence of a primitive plume under Australia based on neon isotope fractionation during step heating' by Gautheron and Moreira (2003)

Takuya Matsumoto*, Masahiko Honda, Ian McDougall, Igor Yatsevich, Suzanne Y. O'Reilly

*Corresponding author for this work

    Research output: Contribution to journalArticle

    11 Citations (Scopus)

    Abstract

    Using a Rayleigh distillation fractionation model, we calculate that the maximum isotope fractionation potentially achievable is less than 5% during the early stages of gas release from a sample. Our calculation corrects the erroneous conclusions of Gautheron and Moreira (2003), who re-interpreted the plume-like neon isotopic compositions found in metasomatic apatite from a south-eastern Australian xenolith (Matsumoto et al., 1997) to be the result of Rayleigh-type isotope fractionation of originally MORB-type neon during stepheating gas extraction. We stress that the modelling of neon isotopic fractionation by Gautheron and Moreira (2003) is incorrect, and that the finding of a plume-like neon isotopic composition in the apatite by Matsumoto et al. (1997) remains a quite valid and robust conclusion.

    Original languageEnglish
    Pages (from-to)23-26
    Number of pages4
    JournalTerra Nova
    Volume16
    Issue number1
    DOIs
    Publication statusPublished - 1 Feb 2004

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