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Low-temperature, hydrothermal garnet associated with zeolites, from basalt lavas near Beith, Ayrshire

Published online by Cambridge University Press:  05 July 2018

A. Livingstone
A. Livingstone*
Affiliation:
Department of Geology, Royal Museum of Scotland, Chambers Street, Edinburgh EH1 1JF
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Abstract

A Working quarry, at Loanhead (NS363557) within the Clyde Plateau Carboniferous lavas, is traversed by a tholeiitic Tertiary dyke some 25-30 m wide. Throughout the quarry the lavas are extensively altered and the most prominent secondary minerals are calcite and prehnite. Adjacent to the dyke is an indefinite alteration zone within which garnet has developed in close association with analcime and thomsonite. Contact metamorphism is not apparent. Secondary minerals in the quarried lavas and from the alteration zone have been described by Meikle (1989). The most salient feature of secondary mineral formation central to this paper is that grossular and andradite occur, in situ, in close proximity to the dyke, and only in the amygdales.

Keywords

garnetzeolitesbasalt lavasBeithAyrshireScotland
Type
Short Communications
Information
Mineralogical Magazine , Volume 53 , Issue 369 , March 1989 , pp. 125 - 129
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1989

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References

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