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

journal contribution
posted on 2023-05-17, 08:58 authored by Mernagh, TP, Vadim Kamenetsky, Maya KamenetskyMaya Kamenetsky
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.

History

Publication title

Spectrochimica Acta. Part A: Molecular and Biomolecular Spectroscopy

Volume

80

Pagination

82-87

ISSN

1386-1425

Department/School

School of Natural Sciences

Publisher

Pergamon-Elsevier Science Ltd

Place of publication

The Boulevard, Langford Lane, Kidlington, Oxford, England, Ox5 1Gb

Rights statement

Copyright 2011 Elsevier

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the earth sciences

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