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

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,...

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Bibliographic Details
Published in:Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Main Authors: Mernagh, TP, Kamenetsky, VS, Kamenetsky, MB
Format: Article in Journal/Newspaper
Language:English
Published: Pergamon-Elsevier Science Ltd 2011
Subjects:
Earth Sciences
Geology
Igneous and Metamorphic Petrology
Canada
Greenland
Siberia
Online Access:https://doi.org/10.1016/j.saa.2011.01.034
http://www.ncbi.nlm.nih.gov/pubmed/21334252
http://ecite.utas.edu.au/74072
Description
Summary: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 NaCaBa 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.

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