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1 Department of Geological Sciences, University of Durham, Durham DHl 3LE, UK
2 Geology and Cartography Division, School of Construction and Earth Sciences, Oxford Brookes University, Headington, Oxford OX3 OBP, UK
The Outer Hebrides Fault Zone is a major ESE-dipping reactivated fault within the Lewisian gneisses of the Laurentian craton in NW Scotland. Early thrust structures are overprinted by a network of retrograde ductile shear zones in which fluid channelling has hydrated the pre-existing basement rocks at low temperatures, forming chlorite-white mica phyllonites in regions of highest strain. Strike-parallel mineral lineations and shear-sense indicators suggest sinistral displacements that are thought to be late Caledonian based on isotopic data and regional considerations. The phyllonites have focused extensional movements that overprint strike-slip fabrics and may control the location of the Mesozoic Sea of Hebrides and Minch basins.
Keywords: Outer Hebrides, faults, reactivation, phyllonites.
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|
|
|
|
 |
|
 References Geological Society, London, Memoirs, 2002; 24: 119 - 125. [PDF]
|
|
|
|
|
|
G. R. Osinski, G. R. OSINSKI, G. I. ALSOP, and G. J. H. OLIVER Extensional tectonics of the Outer Hebrides Fault Zone, South Uist, northwest Scotland Geological Magazine, 2001; 138: 325 - 344. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. E. Holdsworth, M. Stewart, J. Imber, and R. A. Strachan The structure and rheological evolution of reactivated continental fault zones: a review and case study Geological Society, London, Special Publications, 2001; 184: 115 - 137. [Abstract] [PDF]
|
|
|
|
|
|
E. A. Macinnes, E. A. MACINNES, G. I. ALSOP, and G. J. H. OLIVER Contrasting modes of reactivation in the Outer Hebrides Fault Zone, northern Barra, Scotland Journal of the Geological Society, 2000; 157: 1009 - 1017. [Abstract] [Full Text]
|
|
|
|
|
|
R. E. HOLDSWORTH, C. A. BUTLER, and A. M. ROBERTS The recognition of reactivation during continental deformation Journal of the Geological Society, 1997; 154: 73 - 78. [Abstract] [PDF]
|
|
|
|
|
|
J. IMBER, R. E. HOLDSWORTH, C. A. BUTLER, and G. E. LLOYD Fault-zone weakening processes along the reactivated Outer Hebrides Fault Zone, Scotland Journal of the Geological Society, 1997; 154: 105 - 109. [Abstract] [PDF]
|
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