Source assemblage types for cratonic diamonds from X-ray synchrotron diffraction

F. Nestola, M. Alvaro, M. N. Casati, H. Wilhelm, A. K. Kleppe, A. P. Jephcoat, M. C. Domeneghetti, J. W. Harris

    Research output: Contribution to journalArticlepeer-review

    8 Citations (Scopus)

    Abstract

    Three single crystals of clinopyroxene trapped within three different gem-quality diamonds from the Udachnaya kimberlite (Siberia, Russia) were analysed in situ by single-crystal synchrotron X-ray diffraction in order to obtain information on their chemical composition and infer source assemblage type. A non-destructive approach was used with high-energy (≈ 60 keV; λ ≈ 0.206 Å) at I15, the extreme-conditions beamline at Diamond Light Source. A dedicated protocol was used to center the mineral inclusions located deep inside the diamonds in the X-ray beam. Our results reveal that two of the inclusions can be associated with peridotitic paragenesis whereas the third is eclogitic. This study also demonstrates that this non-destructive experimental approach is extremely efficient in evaluating the origin of minerals trapped in their diamond hosts.

    Original languageEnglish
    Pages (from-to)334-338
    Number of pages5
    JournalLITHOS
    Volume265
    DOIs
    Publication statusPublished - Nov 15 2016

    Keywords

    • Clinopyroxene
    • Diamond
    • Eclogite
    • Peridotite
    • Synchrotron

    ASJC Scopus subject areas

    • Geology
    • Geochemistry and Petrology

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