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The role of fractional crystallization in the formation of granitic and intermediate rocks of the Beinn Chaisgidle Centre, Mull, Scotland

Published online by Cambridge University Press:  05 July 2018

J. N. Walsh  and
E. Clarke
J. N. Walsh
Affiliation:
Department of Geology, King's College, Strand, London WC2R 2LS
E. Clarke
Affiliation:
Department of Geology, King's College, Strand, London WC2R 2LS
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Abstract

Major and trace element data are presented for the basic, intermediate, and acid rocks of the Beinn Chaisgidle Centre of the Tertiary igneous complex on the Isle of Mull. The variation in the bulk chemical composition, the iron enrichment trend in the clinopyroxenes, the systematic decrease in concentrations of the transition metal cations, and the increase in the incompatible elements suggest that the magma from which these rocks formed underwent crystal fractionation. The rocks show a coherence of rare earth element patterns for all the rocks in the sequence, and there is a progressive increase in negative Eu anomaly with increasing silica content.

Type
Research Article
Information
Mineralogical Magazine , Volume 45 , Issue 337 , 1982 , pp. 247 - 255
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1982

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