Effects of Dilatant Hardening on Fault Stabilization and Structural Development

dc.citation.articleNumbere2024GL108840en_US
dc.citation.issueNumber10en_US
dc.citation.journalTitleGeophysical Research Lettersen_US
dc.citation.volumeNumber51en_US
dc.contributor.authorWilliams, S. A.en_US
dc.contributor.authorFrench, M. E.en_US
dc.date.accessioned2024-08-07T19:14:59Zen_US
dc.date.available2024-08-07T19:14:59Zen_US
dc.date.issued2024en_US
dc.description.abstractDilatant hardening is one proposed mechanism that causes slow earthquakes along faults. Previous experiments and models show that dilatant hardening can stabilize fault rupture and slip in several lithologies. However, few studies have systematically measured the mechanical behavior across the transition from dynamic to slow rupture or considered how the associated damage varies. To constrain the processes and scales of dilatant hardening, we conducted triaxial compression experiments on cores of Crab Orchard sandstone and structural analyses using micro-computed tomography imaging and petrographic analysis. Experiments were conducted at an effective confining pressure of ∼10 MPa, while varying confining pressure (10–130 MPa) and pore fluid pressure (1–120 MPa). Above 15 MPa pore fluid pressure, dilatant hardening slows the rate of fault rupture and slip and deformation becomes more distributed amongst multiple faults as microfracturing increases. The resulting increase in fracture energy has the potential to control fault slip behavior.en_US
dc.identifier.citationWilliams, S. A., & French, M. E. (2024). Effects of Dilatant Hardening on Fault Stabilization and Structural Development. Geophysical Research Letters, 51(10), e2024GL108840. https://doi.org/10.1029/2024GL108840en_US
dc.identifier.digitalEffects-of-Dilatant-Hardeningen_US
dc.identifier.doihttps://doi.org/10.1029/2024GL108840en_US
dc.identifier.urihttps://hdl.handle.net/1911/117598en_US
dc.language.isoengen_US
dc.publisherWileyen_US
dc.rightsExcept where otherwise noted, this work is licensed under a Creative Commons Attribution (CC BY) license.  Permission to reuse, publish, or reproduce the work beyond the terms of the license or beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleEffects of Dilatant Hardening on Fault Stabilization and Structural Developmenten_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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