Carbon isotopes In China natural diamonds

H.-F. Zhang, F X Lu, L Zhao, Martin Menzies, Dave Mattey, S.Y. LIang

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Abstract

China's two major natural diamond-producing mines-Shandong Mengyin and Liaoning Fuxian produce a large quantity of high-quality diamonds. EA-IRMS (Isotope Ratio Mass Spectrometry connected with Elemental Analyzer) analyses reveal that these single-crystal diamonds ubiquitously bear carbon isotope zonation. And in both localities, the carbon isotope zonation is more apparent in solid inclusion-bearing diamonds than in non-inclusion diamonds. Carbon isotope nature in Chinese diamonds also demonstrates that these diamonds-forming carbons were derived from mantle, with no equivocal evidence for the involvement of crust carbons derived from the recycling of the surface sediments.
Original languageEnglish
Pages (from-to)37-42
Number of pages6
JournalJournal of China University of Geosciences
Volume34
Issue number1
Publication statusPublished - 2009

Keywords

  • Chinese diamonds
  • C isotopes

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