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 language | English |
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Pages (from-to) | 37-42 |
Number of pages | 6 |
Journal | Journal of China University of Geosciences |
Volume | 34 |
Issue number | 1 |
Publication status | Published - 2009 |
Keywords
- Chinese diamonds
- C isotopes