2D distinct element modeling of the structure and growth of normal faults in multilayer sequences : 1. Model calibration, boundary conditions, and selected results

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dc.contributor.author Schöpfer, Martin P. J.
dc.contributor.author Childs, Conrad
dc.contributor.author Walsh, John J.
dc.date.accessioned 2011-07-22T13:33:09Z
dc.date.available 2011-07-22T13:33:09Z
dc.date.copyright 2007 The American Geophysical Union en
dc.date.issued 2007
dc.identifier.citation Journal of Geophysical Research - Solid Earth en
dc.identifier.uri http://hdl.handle.net/10197/3033
dc.description.abstract The distinct element method is used for modeling the growth of normal faults in layered sequences. The models consist of circular particles that can be bonded together with breakable cement. Size effects of the model mechanical properties were studied for a constant average particle size and various sample widths. The study revealed that the bulk strength of the model material decreases with increasing sample size. Consequently, numerical lab tests and the associated construction of failure envelopes were performed for the specific layer width to particle diameter ratios used in the multilayer models. The normal faulting models are composed of strong layers (bonded particles) and weak layers (nonbonded particles) that are deformed in response to movement on a predefined fault at the base of the sequence. The modeling reproduces many of the geometries observed in natural faults, including (1) changes in fault dip due to different modes of failure in the strong and weak layers, (2) fault bifurcation (splaying), (3) the flexure of strong layers and the rotation of associated blocks to form normal drag, and (4) the progressive linkage of fault segments. The model fault zone geometries and their growth are compared to natural faults from Kilve foreshore (Somerset, United Kingdom). Both the model and natural faults provide support for the well-known general trend that fault zone width increases with increasing displacement. en
dc.description.sponsorship Irish Research Council for Science, Engineering and Technology en
dc.format.extent 4541248 bytes
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher American Geophysical Union en
dc.subject Faults en
dc.subject Modelling en
dc.subject Multilayer en
dc.subject Fault zone en
dc.subject.lcsh Faults (Geology)--Mathematical models en
dc.subject.lcsh Fault zones--Mathematical models en
dc.subject.lcsh Rock deformation--Mathematical models en
dc.title 2D distinct element modeling of the structure and growth of normal faults in multilayer sequences : 1. Model calibration, boundary conditions, and selected results en
dc.title.alternative Two-dimensional distinct element modeling of the structure and growth of normal faults in multilayer sequences en
dc.type Journal Article en
dc.internal.availability Full text available en
dc.internal.webversions Publisher's version en
dc.internal.webversions http://dx.doi.org/10.1029/2006JB004902 en
dc.status Peer reviewed en
dc.identifier.volume 112 en
dc.identifier.issue B10401 en
dc.identifier.doi 10.1029/2006JB004902
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.description.othersponsorship Enterprise Ireland en


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