Abstract
The 2D Distinct Element Method (DEM), in which rock is represented as an assemblage of cylindrical particles that can be cemented together, is used for modeling the growth of normal faults in layered sequences. The outcrop-scale models are comprised of strong and weak layers, modeled as bonded and non-bonded particles, respectively, which are deformed at various confining pressures using a pre-defined fault at the base of the periodically layered sequence. The models successfully reproduce a wide range of fault geometries seen in outcrop, such as lithologically controlled fault dip variations, fault bifurcation and segmentation, and also illustrate the progressive removal of asperities and the linkage of fault segments, which leads to the formation of fault bound lenses. A sensitivity study reveals that fault zone complexity decreases with decreasing strength of the cohesive beds and increasing confining pressure. A suite of models comprised of sequences with different proportions of strong and weak beds suggests that the overall fault zone dip increases with decreasing fraction of weak material in the sequence.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
