Carbon isotopes In China natural diamonds

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

Carbon isotopes In China natural diamonds

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

Department of Earth Sciences

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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 language	English
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

Access to Document

Zhang et al 2009 C isotopes (In Chinese with English abstract)Submitted manuscript, 311 KB

Cite this

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AU - Lu, F X

AU - Zhao, L

AU - Menzies, Martin

AU - Mattey, Dave

AU - LIang, S.Y.

PY - 2009

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AB - 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.

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