Evidence for Caledonian sinistral strike-slip motion and associated fault zone weakening, Outer Hebrides fault zone, NW Scotland

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doi: 10.1144/gsjgs.152.5.0743
Authors:Butler, C. A.; Holdsworth, R. E.; Strachan, R. A.
Author Affiliations:Primary:
University of Durham, Department of Geological Sciences, Durham, United Kingdom
Other:
Oxford Brookes University, United Kingdom
Volume Title:Journal of the Geological Society of London
Source:Journal of the Geological Society of London, Vol.152(Part 5), p.743-746. Publisher: Geological Society of London, London, United Kingdom. ISSN: 0016-7649
Publication Date:1995
Note:In English. 22 refs.; illus., incl. 1 table, geol. sketch map
Summary:This major ESE-dipping reactivated fault within the Lewisian gneisses has early thrust structures overprinted by a network of retrograde ductile shear zones in which channelling has hydrated the pre-existing basement rocks at low T, 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 locations of the Mesozoic Sea of the Hebrides and Minch basins. [R.A.H.]
Subjects:Caledonian Orogeny; Fault zones; Faults; Metamorphic rocks; Paleozoic; Phyllonites; Reactivation; Shear zones; Strike-slip faults; Europe; Great Britain; Scotland; United Kingdom; Western Europe; Northwestern Scotland; Outer Hebrides fault zone
Abstract Numbers:96M/950
Record ID:1996011175
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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100 1 |a Butler, C. A.  |e analytic author  |u University of Durham, Department of Geological Sciences, Durham 
245 1 0 |a Evidence for Caledonian sinistral strike-slip motion and associated fault zone weakening, Outer Hebrides fault zone, NW Scotland 
300 |a p. 743-746 
500 |a In English. 22 refs. 
500 |a Abstract number: 96M/950 
500 |a Abstractor: R.A.H. 
500 |a Affiliation: University of Durham, Department of Geological Sciences; Durham; GBR; United Kingdom 
500 |a Affiliation: Oxford Brookes University; ; GBR; United Kingdom 
500 |a Key title: Journal of the Geological Society of London 
500 |a Source note: Journal of the Geological Society of London, Vol.152(Part 5), p.743-746. Publisher: Geological Society of London, London, United Kingdom. ISSN: 0016-7649 
500 |a Publication type: journal article 
504 |b 22 refs. 
510 3 |a GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom 
520 |a This major ESE-dipping reactivated fault within the Lewisian gneisses has early thrust structures overprinted by a network of retrograde ductile shear zones in which channelling has hydrated the pre-existing basement rocks at low T, 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 locations of the Mesozoic Sea of the Hebrides and Minch basins. 
650 7 |a Caledonian Orogeny  |2 georeft 
650 7 |a Fault zones  |2 georeft 
650 7 |a Faults  |2 georeft 
650 7 |a Metamorphic rocks  |2 georeft 
650 7 |a Paleozoic  |2 georeft 
650 7 |a Phyllonites  |2 georeft 
650 7 |a Reactivation  |2 georeft 
650 7 |a Shear zones  |2 georeft 
650 7 |a Strike-slip faults  |2 georeft 
651 7 |a Europe  |2 georeft 
651 7 |a Great Britain  |2 georeft 
651 7 |a Scotland  |2 georeft 
651 7 |a United Kingdom  |2 georeft 
651 7 |a Western Europe  |2 georeft 
653 |a Northwestern Scotland 
653 |a Outer Hebrides fault zone 
700 1 |a Holdsworth, R. E.,  |e analytic author 
700 1 |a Strachan, R. A.,  |e analytic author 
773 0 |t Journal of the Geological Society of London  |d London : Geological Society of London, Sep. 1995  |x 0016-7649  |y JGSLAS  |n Journal of the Geological Society of London, Vol.152(Part 5), p.743-746. Publisher: Geological Society of London, London, United Kingdom. ISSN: 0016-7649 Publication type: journal article  |g Vol. 152, Part 5  |h illus., incl. 1 table, geol. sketch map 
856 |u urn:doi: 10.1144/gsjgs.152.5.0743