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Progressive Replacement of Limestone Inclusions in Granite at Ballynacarrick, Co. Donegal

Published online by Cambridge University Press:  01 May 2009

Amin R. Gindy
Amin R. Gindy
Affiliation:
Department of Geology, Imperial College, London, S.W. 7.
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Abstract

Limestone inclusions in granite show a skarn armour made up of definite mineral zones. From the limestone side these are in order: grossular zone (with or without idocrase), clinozoisite zone, plagio-clase-pyroxene zone, and finally a hornblendic or dioritic zone that passes into the biotite-granite or granodiorite of the district. These different zones were not static but moved into the limestone, each zone replacing the one preceding it and being replaced by the zone following it. A mechanism by which limestone inclusions disappear in granite is clearly exemplified.

Type
Articles
Information
Geological Magazine , Volume 90 , Issue 3 , June 1953 , pp. 152 - 158
Copyright
Copyright © Cambridge University Press 1953

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References

REFERENCES

Gindy, A. R., 1952. The plutonic history of the region around Trawenagh Bay, County Donegal, Eire. Abstr. Proc. Geol. Soc., No. 1482, 8th 02, p. 30.Google Scholar
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Pitcher, W. S., 1950. Calc-silicate skarn veins in the limestone of Lough Anure, Co. Donegal. Miner. Mag., xxix, 126.Google Scholar