1 The Laxford Shear Zone: an end-Archaean terrane 2 boundary? 3 K M Goodenough1,*; R G Park2; M Krabbendam1; J S Myers3; J Wheeler4; S C 4 Loughlin1; Q G Crowley5,10; C R L Friend6; A Beach7; P D Kinny8 and R H Graham9. 5 1: British Geological Survey, West Mains Road, Edinburgh EH9 3LA, UK. 6 (* Corresponding author:
[email protected]) 7 2: 12 Provost Ferguson Drive, Tain, Ross-shire IV19 1RE, UK 8 3: 77 Falls Road, Lesmurdie, WA 6076, Australia 9 4: Department of Earth and Ocean Sciences, Liverpool University, Liverpool 10 L69 3GP, UK 11 5: NERC Isotope Geosciences Laboratory, Keyworth, Nottingham, NG12 5GG, UK 12 6: 45, Stanway Road, Risinghurst, Headington, Oxford, OX3 8HU 13 7: Exploration Outcomes, 1 Huntly Gardens, Glasgow, G12 9AS 14 8: Department of Applied Geology, Curtin University of Technology, 15 GPO Box U1987 Perth 6845, Western Australia 16 9: Hess, Level 9, Adelphi Building, London WC2N 6AG, UK 17 10: Department of Geology, Trinity College, Dublin 2, Ireland 18 19 Text 7,815 words; References 1,700 words; 7 figures; 1 table 20 Abbreviated title: The Laxford Shear Zone 21 1 22 Abstract 23 The Lewisian Gneiss Complex of north-western Scotland consists of Archaean 24 gneisses, variably reworked during the Proterozoic. It can be divided into three 25 districts – a central granulite-facies district between districts of amphibolite-facies 26 gneiss to the north and south. Recent work has interpreted these districts in terms of 27 separate terranes, initiating a controversy that has implications for how Precambrian 28 rocks are understood worldwide.