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

1 January 1965

journal article
Published by Mineralogical Society in Mineralogical Magazine and Journal of the Mineralogical Society

Vol. 34 (268) , 292-302
https://doi.org/10.1180/minmag.1965.034.268.25

Abstract

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.

Keywords

This publication has 1 reference indexed in Scilit:

VIII.—The Petrology of the Layered Basic Rocks of the Carlingford Complex, Co. Louth
Transactions of the Royal Society of Edinburgh, 1960