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

*Corresponding author for this work

Research output: Contribution to journalArticle

6 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 - 15 Nov 2016
Externally publishedYes

Keywords

  • Clinopyroxene
  • Diamond
  • Eclogite
  • Peridotite
  • Synchrotron

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