T008
Frictional, geological, and geophysical signatures of fault healing: Mechanisms and implications for deformation during the earthquake cycle
Session ID#: 158962
Session Description:
Fault healing or restrengthening is a necessary component of the seismic cycle. Parameters such as stress, temperature, fluids, fluid pressures, lithology, and fault maturity influence the magnitude and underlying mechanisms causing faults to restrengthen. Probing links between interseismic healing and fault slip modes is key to a better physical understanding of earthquake mechanics. This session focuses on geological and geophysical observations of fault healing in nature as well as frictional healing in the (experimental and numerical) laboratory. We welcome interdisciplinary and multi-scale studies of healing that use one or more techniques including but not limited to microscopy, high-speed friction experiments, numerical modeling of fault friction, and time-lapse tomography in the field. We envision the session will stimulate discussions surrounding mechanisms of healing down to the grain/asperity scale, and what this means for the diversity of slip modes (aseismic creep and slow slip to dynamic ruptures) observed at fault zones globally.
Index Terms:
8010 Fractures and faults [STRUCTURAL GEOLOGY]
8020 Mechanics, theory, and modeling [STRUCTURAL GEOLOGY]
8118 Dynamics and mechanics of faulting [TECTONOPHYSICS]
8163 Rheology and friction of fault zones [TECTONOPHYSICS]
Primary Convener: Srisharan Shreedharan, University of Texas, Institute for Geophysics, Austin, TX, United States
Conveners: Caroline Seyler, University of Texas, Austin, Institute for Geophysics, Austin, TX, United States, Behrooz Ferdowsi, University of Houston, Houston, TX, United States and Alexis K Ault, Utah State University, Department of Geosciences, Logan, UT, United States
Comparing fault healing in laboratory experiments to repeating earthquakes: A case study of Prague, Oklahoma, U.S.A. (Invited) (1063564)
Kristina Okamoto1, Heather M Savage1, Elizabeth S Cochran2, Emily E Brodsky3, Brett M Carpenter4 and Jack Sullivan1, (1)University of California Santa Cruz, Earth and Planetary Sciences, Santa Cruz, United States, (2)U.S. Geological Survey, Earthquake Science Center, Pasadena, United States, (3)University of California Santa Cruz, Earth and Planetary Sciences, Santa Cruz, CA, United States, (4)University of Oklahoma, School of Geosciences, Norman, United States
Strength Recovery and Hydraulic Transmissivity Evolution in Shear Fractures in Westerly Granite at Hydrothermal Conditions (1064086)
Tamara Jeppson1, David A Lockner2, Brian D Kilgore2, Diane E Moore3, Nicholas M Beeler4, Stephen H Hickman5 and Joshua Taron6, (1)USGS Earthquake Science Center, Menlo Park, United States, (2)USGS Earthquake Science Center, Menlo Park, CA, United States, (3)USGS, Earthquake Science Center, Menlo Park, CA, United States, (4)USGS Cascades Volcano Observatory, Vancouver, WA, United States, (5)USGS, Menlo Park, United States, (6)US Geological Survey, Menlo Park, United States
Frictional Healing and Stress (1069841)
David A Lockner, USGS Western Regional Offices Menlo Park, Menlo Park, CA, United States, Tamara Jeppson, University of Wisconsin-Madison, Madison, WI, United States; USGS Earthquake Science Center, Menlo Park, United States and Nicholas M Beeler, USGS Cascades Volcano Observatory, Vancouver, WA, United States
Peak Friction Does Not Depend on Contact Area in Quartz (1118587)
Christopher Walker, Texas A&M University College Station, College Station, United States, Nir Badt, University of Pennsylvania, Department of Earth and Environmental Science, Philadelphia, PA, United States, David L Goldsby, Brown Univ, Providence, United States and George Pharr, Texas A&M University, College Station, United States
Time-Dependent Drop in Fault Strength in the Mochiyama Earthquake Sequence (1141808)
Samuel Edward Wimpenny, University of Leeds, Leeds, LS2, United Kingdom, Alex Copley, COMET, University of Cambridge, Department of Earth Sciences, Cambridge, United Kingdom and Natalie Forrest, University of Leeds, School of Earth and Environment, Leeds, United Kingdom
Frictional Healing of Ancient Subduction-related Mélanges- the Role of Pressure Solution (1155191)
Tsai-Wei Chen1, Raphael A Affinito1, Donald M Fisher1, Chris Marone1, Andrew Smye1 and Yoshitaka Hashimoto2, (1)Pennsylvania State University, Department of Geosciences, University Park, United States, (2)Kochi University, Kochi, Japan
A physics-based constitutive equation for frictional response to normal stress changes (1172548)
Pathikrit Bhattacharya, National Institute of Science Education and Research, HBNI, School of Earth and Planetary Sciences, Bhubaneswar, India, Terry E Tullis, Brown University, DEEPS, Providence, RI, United States, Allan M Rubin, Princeton University, Princeton, NJ, United States, Nicholas M Beeler, USGS Cascades Volcano Observatory, Vancouver, WA, United States and Nir Badt, University of Pennsylvania, Earth and Environmental Sciences, Philadelphia, United States
Fault Healing, Fluid Flow, and Seismicity Distributions Along the Altotiberina Low-Angle Normal Fault, Central Italy (1186196)
Hannah Beth Riegel, Appalachian State University, Boone, NC, United States and John N Hooker, University of the Incarnate Word, San Antonio, TX, United States
