Combined C isotope and geochemical evidence for a recycled origin for diamondiferous eclogite xenoliths from kimberlites of Yakutia

Z.V. Spetsius, D.F. Wiggers de Vries, G.R. Davies

    Research output: Contribution to JournalArticleAcademicpeer-review

    Abstract

    An integrated petrographic-geochemistry and stable isotope study of 15 diamondiferous eclogite xenoliths is presented from the Udachnaya pipe, Russia. Carbon isotope determinations were performed by combustion and SIMS while in situ mineral major and trace element concentrations were determined using LA-ICP-MS and microprobe. Carbon isotope compositions of diamonds range from - 13.7 to - 2.8‰. Although this range is less than that reported from all diamonds from kimberlites (- 38.5 to + 5.0‰), the large variation in a small sample suite establishes that the C sources in the eclogite parental rocks were extremely variable. The carbon isotope composition of diamonds from a single sample records little variation, with δ
    Original languageEnglish
    Pages (from-to)1032-1042
    JournalLithos
    Volume112
    Issue number2
    DOIs
    Publication statusPublished - 2009

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