Controls on the location of compressional deformation on the NW European margin

G.S. Kimbell, M.A. Stewart, S. Gradmann, P.M. Shannon, T. Funck, C. Haase, M.S. Stoker, J.R. Hopper

Research output: Chapter in Book/Report/Conference proceedingChapter in bookResearchpeer-review

16 Citations (Scopus)

Abstract

The distribution of Cenozoic compressional structures along the NW European margin has been compared with maps of the thickness of the crystalline crust derived from a compilation of seismic refraction interpretations and gravity modelling, and with the distribution of high-velocity lower crust and/or partially serpentinized upper mantle detected by seismic experiments. Only a subset of the mapped compressional structures coincide with areas susceptible to lithospheric weakening as a result of crustal hyperextension and partial serpentinization of the upper mantle. Notably, partially serpentinized upper mantle is well documented beneath the central part of the southern Rockall Basin, but compressional features are sparse in that area. Where compressional structures have formed but the upper mantle is not serpentinized, simple rheological modelling suggests an alternative weakening mechanism involving ductile lower crust and lithospheric decoupling. The presence of pre-existing weak zones (associated with the properties of the gouge and overpressure in fault zones) and local stress magnitude and orientation are important contributing factors.

Original languageEnglish
Title of host publicationThe NE Atlantic Region
Subtitle of host publicationA Reappraisal of Crustal Structure, Tectonostratigraphy and Magmatic Evolution
EditorsG. Péron-Pinvidic, J.R. Hopper, T. Funck, M.S. Stoker, C. Gaina, J.C. Doornenbal, U.E. Árting
Place of PublicationLondon
PublisherGeological Society of London
Pages249-277
Number of pages29
ISBN (Print)978-1-78620-278-9
DOIs
Publication statusPublished - 2017

Publication series

SeriesGeological Society Special Publications
Volume447
ISSN0305-8719

Programme Area

  • Programme Area 3: Energy Resources

Fingerprint

Dive into the research topics of 'Controls on the location of compressional deformation on the NW European margin'. Together they form a unique fingerprint.

Cite this