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A Raman microprobe study of melt Inclusions in kimberlites from Siberia, Canada, SW Greenland and South Africa

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Mernagh, TP and Kamenetsky, VS and Kamenetsky, MB (2011) A Raman microprobe study of melt Inclusions in kimberlites from Siberia, Canada, SW Greenland and South Africa. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 80A (1). pp. 82-87. ISSN 1386-1425

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Abstract

Raman spectroscopy has been used for the identification of both common and uncommon minerals in melt inclusions in Group-I kimberlites from Siberia, Canada, SW Greenland and South Africa. The melt inclusions all contained high abundances of alkali-Ca carbonates, with varying proportions of cations, and Na–Ca–Ba sulphates. In accordance with its dry mineralogy, no hydrated carbonates or sulphates were detected in melt inclusions from the Udachnaya-East kimberlite. In contrast, the melt inclusions in kimberlites from Canada, South Africa and SW Greenland were found to contain bassanite, pirssonite, and hydromagnesite suggesting that greater amounts of water were present in their residual magmas. This suggests that enrichment in alkali carbonates and sulphates is widespread across a range of Group-I kimberlites and implies that they commonly have an alkali-, and sulphur-rich residual liquid.

Item Type: Article
Journal or Publication Title: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Page Range: pp. 82-87
ISSN: 1386-1425
Identification Number - DOI: 10.1016/j.saa.2011.01.034
Additional Information: The definitive version is available at http://www.sciencedirect.com
Date Deposited: 11 Aug 2011 01:06
Last Modified: 18 Nov 2014 04:21
URI: http://eprints.utas.edu.au/id/eprint/11482
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