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Isotopic evidence for the extent of early Proterozoic basement in Scotland and northwest Ireland

Published online by Cambridge University Press:  01 May 2009

A. P. Dickin  and
D. R. Bowes
A. P. Dickin
Affiliation:
Department of Geology, McMaster University, Hamilton, Ontario L8S 4M1, Canada
D. R. Bowes
Affiliation:
Department of Geology and Applied Geology, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K.
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Abstract

Tightly clustered Sm–Nd model ages, with an average of 1.96±0.02Ga, for the gneiss complex of Inishtrahull indicate coeval development with the earlyProterozoic gneiss terrane of Islay. The extent of this terrane, largely beneath the Dalradian Supergroup, is argued to be 100×600 km, from northeast Scotland to western Ireland. This is based on the distribution of dated basement in conjunction with Pb, Sr and Nd isotope systematics and inherited zircons in Caledonian granites of the region.

Type
Articles
Information
Geological Magazine , Volume 128 , Issue 4 , July 1991 , pp. 385 - 388
Copyright
Copyright © Cambridge University Press 1991

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