2D distinct element modeling of the structure and growth of normal faults in multilayer sequences : 1. Model calibration, boundary conditions, and selected results
Files in This Item:
|Schopfer_et_al_Part_1_JGR_2007_repository.pdf||4.43 MB||Adobe PDF||Download|
|Title:||2D distinct element modeling of the structure and growth of normal faults in multilayer sequences : 1. Model calibration, boundary conditions, and selected results||Authors:||Schöpfer, Martin P. J.
Walsh, John J.
|Permanent link:||http://hdl.handle.net/10197/3033||Date:||2007||Online since:||2011-07-22T13:33:09Z||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.||Funding Details:||Irish Research Council for Science, Engineering and Technology||Type of material:||Journal Article||Publisher:||American Geophysical Union||Journal:||Journal of Geophysical Research - Solid Earth||Volume:||112||Issue:||B10401||Copyright (published version):||2007 The American Geophysical Union||Keywords:||Faults; Modelling; Multilayer; Fault zone||Subject LCSH:||Faults (Geology)--Mathematical models
Fault zones--Mathematical models
Rock deformation--Mathematical models
|DOI:||10.1029/2006JB004902||Other versions:||http://dx.doi.org/10.1029/2006JB004902||Language:||en||Status of Item:||Peer reviewed|
|Appears in Collections:||Earth Sciences Research Collection|
Show full item record
Page view(s) 1446
This item is available under the Attribution-NonCommercial-NoDerivs 3.0 Ireland. No item may be reproduced for commercial purposes. For other possible restrictions on use please refer to the publisher's URL where this is made available, or to notes contained in the item itself. Other terms may apply.