Geometrical analysis of the refraction and segmentation of normal faults in periodically layered sequences

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Show simple item record Schöpfer, Martin P. J. Childs, Conrad Walsh, John J. Manzocchi, Tom Koyi, Hemin A. 2011-07-20T16:27:37Z 2011-07-20T16:27:37Z 2006 Elsevier Ltd. en 2007-02
dc.identifier.citation Journal of Structural Geology en
dc.identifier.issn 0191-8141
dc.description.abstract Normal faults contained in multilayers are often characterised by dip refraction which is generally attributed to differences in the mechanical properties of the layers, sometimes leading to different modes of fracture. Because existing theoretical and numerical schemes are not yet capable of predicting the 3D geometries of normal faults through inclined multilayer sequences, a simple geometric model is developed which predicts that such faults should show either strike refraction or fault segmentation or both. From a purely geometrical point of view a continuous refracting normal fault will exhibit strike (i.e. map view) refraction in different lithologies if the intersection lineation of fault and bedding is inclined. An alternative outcome of dip refraction in inclined multilayers is the formation of segmented faults exhibiting en échelon geometry. The degree of fault segmentation should increase with increasing dip of bedding, and a higher degree of segmentation is expected in less abundant lithologies. Strike changes and associated fault segmentation predicted by our geometrical model are tested using experimental analogue modelling. The modelling reveals that normal faults refracting from pure dip-slip predefined faults into an overlying (sand) cover will, as predicted, exhibit systematically stepping segments if the base of the cover is inclined. en
dc.description.sponsorship Irish Research Council for Science, Engineering and Technology en
dc.format.extent 3479339 bytes
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Elsevier en
dc.rights This is the author’s version of a work that was accepted for publication in Journal of Structural Geology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Structural Geology Volume 29, Issue 2, February 2007, Pages 318-335 DOI#: 10.1016/j.jsg.2006.08.006 . en
dc.subject Fault geometry en
dc.subject Fault refraction en
dc.subject Fault segmentation en
dc.subject En échelon en
dc.subject Sandbox modelling en
dc.subject.lcsh Faults (Geology) en
dc.subject.lcsh Geology, Structural en
dc.subject.lcsh Geometrical models en
dc.title Geometrical analysis of the refraction and segmentation of normal faults in periodically layered sequences en
dc.type Journal Article en
dc.internal.availability Full text available en
dc.internal.webversions en
dc.status Peer reviewed en
dc.identifier.volume 29 en
dc.identifier.issue 2 en
dc.identifier.startpage 318 en
dc.identifier.endpage 335 en
dc.identifier.doi 10.1016/j.jsg.2006.08.006
dc.neeo.contributor Schöpfer|Martin P. J.|aut| en
dc.neeo.contributor Childs|Conrad|aut| en
dc.neeo.contributor Walsh|John J.|aut| en
dc.neeo.contributor Manzocchi|Tom|aut| en
dc.neeo.contributor Koyi|Hemin A.|aut| en
dc.description.othersponsorship Enterprise Ireland en

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