Mohapatra, Ratan K. ; Murty, S. V. S. (2004) Nitrogen isotopes in mantle-derived diamonds: indications of a multi-component structure Current Science, 87 (11). pp. 1577-1580. ISSN 0011-3891
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Official URL: http://www.ias.ac.in/currsci/dec102004/1577.pdf
Abstract
Mantle nitrogen trapped in diamonds is commonly defined by an isotopic composition (δ15N) of ~-5% based on the central tendency of total combustion diamond data that vary from -25 to +18%. We present here the nitrogen isotopic data from stepped combustion of diamonds, which together with data from other mantlederived materials suggest a multi-component structure of diamond-nitrogen. Mantle nitrogen sampled in diamonds apparently has δ15N ~-15%, similar to that observed in mantle xenoliths and mid-oceanic ridge basalts (MORBs), while nitrogen in a minor population of diamonds from China is consistent with contributions from an ocean island basalt like mantle source.
Item Type: | Article |
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Source: | Copyright of this article belongs to Current Science Association. |
ID Code: | 23346 |
Deposited On: | 25 Nov 2010 09:13 |
Last Modified: | 17 May 2016 07:11 |
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