Basement control on the location of strike-slip shear in the Southern Uplands of Scotland

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doi: 10.1144/gsjgs.154.1.0141
Authors:Stone, P.; Kimbell, G. S.; Henney, P. J.
Author Affiliations:Primary:
British Geological Survey, Edinburgh, United Kingdom
Other:
University of Durham, United Kingdom
Volume Title:role of basement reactivation in continental deformation
Volume Authors:Butler, R. W. H., editor; Holdsworth, R. E.; Lloyd, G. E.
Source:Journal of the Geological Society of London, Vol.154 (Part 1), p.141-144; Discussion meeting on The role of basement reactivation in continental deformation, Burlington House, United Kingdom, March 6-7, 1996, edited by R. W. H. Butler, R. E. Holdsworth and G. E. Lloyd. Publisher: Geological Society of London, London, United Kingdom. ISSN: 0016-7649
Publication Date:1997
Note:In English. 21 refs.; sketch maps
Summary:In the SW part of the Southern Uplands terrain the Moniaive shear zone has been superimposed above a geophysically defined basement discontinuity. Deformation was a protracted event, starting in the early Wenlock and ending with granite intrusion at ∼ 392 m.y. At the surface the shear zone separates contrasting suites of granitic plutons; these have age differences and isotopic characteristics indicative of a lower crustal and possibly mantle break coincident with the crustal discontinuity deduced from geophysical modelling. It is suggested that sinistral reactivation of the basement structure caused the development of the shear zone within the overlying autochthonous thrust belt. This would mean that the basement structure had been established beneath the developing Southern Uplands terrain by the Wenlock. [R.A.H.]
Subjects:Basement; Bouguer anomalies; Faults; Geophysical methods; Geophysical surveys; Granites; Gravity anomalies; Gravity methods; Igneous rocks; Isotopes; Lower Silurian; Paleozoic; Plutonic rocks; Reactivation; Shear; Silurian; Strike-slip faults; Structural controls; Surveys; Wenlock; Europe; Great Britain; Scotland; Southern Uplands; United Kingdom; Western Europe; Moniaive shear zone
Abstract Numbers:97M/3014
Record ID:1997056638
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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