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He, Ne and Ar in peridotitic and eclogitic paragenesis diamonds from the Jwaneng kimberlite, Bostwana-Implications for mantle evolution and diamond formation ages

Honda, Masahiko; Phillips, David; Harris, Jeffrey W; Matsumoto, Takuya


We have undertaken helium, neon and argon step-heating, isotopic analyses of eleven polycrystalline diamonds of known peridotite/eclogite paragenesis from the Jwaneng kimberlite pipe, Botswana. In contrast to the findings of crustal noble gases in framesites from the same kimberlite pipe (Honda et al., 2004. Unusual noble gas compositions in polycrystalline diamonds: preliminary results from the Jwaneng kimberlite, Botswana. Chem. Geol. 203, 347-358.), the Jwaneng polycrystalline diamonds...[Show more]

CollectionsANU Research Publications
Date published: 2011
Type: Journal article
Source: Earth and Planetary Science Letters
DOI: 10.1016/j.epsl.2010.10.008


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