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Journal of the Geological Society; 2005; v. 162; issue.1; p. 175-186;
DOI: 10.1144/0016-764903-149
© 2005 Geological Society of London

Original Article

Proposal for a terrane-based nomenclature for the Lewisian Gneiss Complex of NW Scotland

P.D. Kinny1, C.R.L. Friend2 & G.J. Love1

1 1Tectonics Special Research Centre, Department of Applied Geology, Curtin University of Technology, GPO Box U1987, Perth, W.A. 6845, Australia
2 245, Stanway Rd., Risinghurst, Headington, Oxford OX3 8HU, UK (e-mail: crlfriend@yahoo.co.uk)

The current nomenclature for the Lewisian Gneiss Complex has evolved from lithological and structural correlations made prior to any dating. Initial (flawed) geochronological studies gave some names an apparent chronological standing but, as work advanced, fitting events into a coherent regional framework became increasingly difficult. Modern dating studies have shown that the Lewisian Gneiss Complex was progressively assembled from disparate blocks of Archaean continental crust and juvenile Proterozoic arcs, which satisfy the definition of terranes. Each terrane had its own separate accretionary and metamorphic history followed by a common history once juxtaposed against other terranes. Based on a new compilation of modern geochronology allied to the many detailed structural and metamorphic studies, this paper proposes a new systematic terminology for the Lewisian Gneiss Complex that is more applicable to this new tectonic framework.

Key Words: Lewisian Gneiss Complex • Archaean • Proterozoic • terranes • geochronology • nomenclature




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