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The contamination of a gabbro by Carboniferous Limestone at Carlingford, Co. Louth

Published online by Cambridge University Press:  14 March 2018

M. J. Le Bas
M. J. Le Bas*
Affiliation:
Department of Geology, The University, Leicester
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Summary

Amongst the layered basic rocks of the Carlingford complex, is a gabbro which has been contaminated by a limited amount of Carboniferous Limestone. The clinopyroxene (Ca49Mg33Fe18) produced in the gabbro is similar to that found in teschenitic gabbros. Such features as the instability of olivine distinguish this contaminated tholeiitic gabbro from true alkaline types. The production of aluminous augite is discussed, and comparison is made with the basic rocks of Scawt Hill and Gunnedah. Analyses of the contaminated gabbro and contained pyroxene are given.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 34 , Issue 268 , 1965 , pp. 292 - 302
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1965

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