T005
Effects of Heterogeneities on Strain Localization in the Crust and Mantle
Session ID#: 163078
Session Description:
Many models of the strength of Earth's crust and mantle are derived from studies on monomineralic isotropic rocks that deform homogeneously; however, the vast majority of rocks contain multiple phases with different strengths and pre-existing features such as pores, cracks, lattice preferred orientations and foliations/bedding. These heterogeneities cause rock strengths to deviate from simplistic models of crust and mantle strength and initiate the processes that control earthquake nucleation and ductile strain localization. We celebrate these deviations from homogeneity and invite studies of the effects of atom to formation-scale heterogeneities on the rheology of the crust and mantle from field, theory and experimental investigators of rheology to contribute to this session. Our aim is to provide an in-person(!), in-depth look at the state-of-the-art of investigating the processes caused by heterogeneities in various fields and systems to identify promising paths forward that will improve rheological models of the lithosphere.
Index Terms:
8199 General or miscellaneous [TECTONOPHYSICS]
Primary Convener: Caleb W Holyoke III, University of Akron, Department of Geosciences, Akron, OH, United States
Conveners: Hiroko Kitajima, Texas A&M University College Station, College Station, TX, United States and Matej Pec, Massachusetts Institute of Technology, Cambridge, MA, United States
Formation of salt diapirs: a numerical study (1064009)
Yiren Gou, University of Missouri, Geological Sciences, Columbia, United States and Mian Liu, University of Missouri, Geological Sciences, Columbia, MO, United States
Micromechanical Testing near the Brittle-Plastic Transition (1068338)
Philip A Skemer1, Michael Sly2, Kelly Kranjc3, Katharine A Padilla4, Benjamin Strozewski2, Arashdeep Thind5, Rohan Mishra4 and Katharine M Flores6, (1)Washington University in St Louis, Department of Earth and Planetary Sciences, St. Louis, MO, United States, (2)Washington University in St Louis, St. Louis, MO, United States, (3)Washington University in St Louis, St. Louis, United States, (4)Washington University in St. Louis, St. Louis, United States, (5)University of Illinois Chicago, Chicago, United States, (6)Washington University in St. Louis, St Louis, United States
Exploring the Roles of Mineralogy and Roughness on Hotspot Development in High-velocity Sliding Experiments on Faults in Westerly Granite (Invited) (1082388)
Monica R Barbery1, Frederick M Chester2 and Judith Savaso Chester2, (1)Brown University, Department of Earth, Environmental and Planetary Sciences, Providence, RI, United States, (2)Texas A & M University, Center for Tectonophysics and the Department of Geology and Geophysics, College Station, TX, United States
Granular Flow vs. Sintering in High-Temperature Shear Zones (Invited) (1093651)
Amy Grace Ryan1, Lars N Hansen1, Mark E Zimmerman2, Kelly Russell3, Michael John Heap4 and Heather M Savage5, (1)University of Minnesota Twin Cities, Minneapolis, MN, United States, (2)University of Minnesota Twin Cities, Minneapolis, United States, (3)University of British Columbia, Earth Ocean and Atmospheric Sciences, Vancouver, BC, Canada, (4)Université de Strasbourg/EOST, Strasbourg, France, Strasbourg, France, (5)University of California Santa Cruz, Earth and Planetary Sciences, Santa Cruz, United States
The Effect of Cement Type on the Occurrence and Nature of Compaction Localization in Three High-porosity Sandstones (1160607)
Elliot Rice-Birchall1, Dan Faulkner2 and John D Bedford1, (1)University of Liverpool, Earth, Ocean and Ecological Sciences, Liverpool, L69, United Kingdom, (2)University of Liverpool, Liverpool, United Kingdom
Quantifying Melt Distribution and Permeability Inside and Outside Shear-Induced Melt-Rich Bands Using Digital Rock Physics (1169839)
James A Bader, University of Maryland College Park, College Park, MD, United States, Wenlu Zhu, University of Maryland, College Park, MD, United States, Laurent Montesi, University of Maryland College Park, Department of Geology, College Park, United States, Chao Qi, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China, Benoit Cordonnier, ESRF European Synchrotron Radiation Facility, Grenoble, France and David L Kohlstedt, University of Minnesota Twin Cities, Minneapolis, MN, United States
Strain Localization and Faulting Caused by the Olivine-Ringwoodite Transformation (1174864)
Julien Gasc1, Damien Deldicque1, Arefeh Moarefvand1, Clémence Daigre1, Blandine Gardonio2, Léo Petit1, Pamela C Burnley3 and Alexandre Schubnel4, (1)Ecole Normale Supérieure Paris, Laboratoire de Géologie, Paris, France, (2)LGLTPE Laboratoire de Géologie de Lyon : Terre, Planètes et Environnement, Villeurbanne Cedex, France, (3)University of Nevada Las Vegas, Geoscience, Las Vegas, United States, (4)Ecole Normale Supérieure, Laboratoire de Géologie, Paris Cedex 16, France
