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On the Age Relations of the Connemara Migmatites and the Galway Granite, West of Ireland

Published online by Cambridge University Press:  01 May 2009

B. E. Leake  and
P. J. Leggo
B. E. Leake
Affiliation:
Geology Department, University, Bristol 8.
P. J. Leggo
Affiliation:
Geology Department, University, Bristol 8.
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Abstract

Contrary to a previously published view, evidence is given to show that the Galway Granite is entirely later than both the quartzandesine migmatization and the potash-felspar migmatization in Connemara, and that the Oughterard Granite is probably earlier than the Galway Granite, not later. There is also strong evidence against regarding the foliated marginal granite of the north and north-east border of the Galway Granite as being different in origin from the marginal granite often found in the southern, western, and north-western borders. These results agree with the radio-chemical date of 365 m.y. determined for part of the Galway Granite.

Type
Articles
Information
Geological Magazine , Volume 100 , Issue 3 , June 1963 , pp. 193 - 204
Copyright
Copyright © Cambridge University Press 1963

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References

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