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Migmatites in the Moines

  • Chapter
Migmatites

Abstract

The Moines (summaries in Johnstone, 1975; Johnson et al., 1979; Johnson, 1983) are a series of late Precambrian metasediments which have undergone both ‘Grenvillian’ (c. 1000 Ma—Brook et al., 1976) and Caledonian (490–440 Ma—Fettes, 1979) amphibolite facies metamorphism. The effects of tectonic reworking and renewed migmatization on rocks of an earlier migmatite complex are particularly well displayed. The conditions of pressure, temperature, etc. under which the early and late migmatites formed may well have been different, giving rise to differing mechanisms of migmatization. Rather than seek a single mechanism for a set of very different leucosomes of varying age within a single outcrop, it will often be more appropriate to seek a common mechanism for a widely-distributed suite of petrographically-similar migmatites of the same age. To this end, the various migmatites must first be classified according to their relationships with widely-correlatable structures, from which inferences may be drawn about their temporal relationships.

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  1. British Geological Survey, 19 Grange Terrace, Edinburgh, EH9 2LF, UK

    David Barr

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  1. Lecturer in Geological Sciences, University of Aston, UK

    J. R. Ashworth

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Barr, D. (1985). Migmatites in the Moines. In: Ashworth, J.R. (eds) Migmatites. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-2347-1_7

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  • DOI: https://doi.org/10.1007/978-1-4613-2347-1_7

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