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

DOI: 10.1016/j.lithos.2016.07.037 DOI Help

Authors: Fabrizio Nestola (University of Padova) , Matteo Alvaro (University of Padua) , Nicola Casati (Swiss Light Source) , Heribert Wilhelm (Diamond Light Source) , Annette Kleppe (Diamond Light Source) , Andrew Jephcoat (Okayama University) , J.w. Harris (University of Glasgow) , M. C. Domeneghetti (Università di Pavia)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Lithos

State: Published (Approved)
Published: August 2016
Diamond Proposal Number(s): 7616

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.

Journal Keywords: Clinopyroxene; Diamond; Synchrotron; Peridotite; Eclogite

Subject Areas: Materials

Instruments: I15-Extreme Conditions

Added On: 15/09/2016 13:17

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