MR43B:
Localized Deformation of Lithospheric Materials: From Grains to Tectonic Plates II Posters

Submit an Abstract to this Session



Session ID#: 23351

Session Description:
Localized deformation can occur at a range of length scales covering orders of magnitude, from sub-millimeter cracks and slip bands to fault and shear zone systems extending hundreds of kilometers along plate boundaries. The wide range of P-T-X conditions and length scales of deformation present in the lithosphere result in a variety of mechanisms to accommodate strain localization, and the resulting fabrics and microstructures have a profound impact on the long-term rheological properties of the crust and upper mantle. This session aims to address the breadth of deformation mechanisms that localize strain in the lithosphere, from the brittle to the ductile regime, and how these mechanisms affect lithospheric strength and microstructural evolution. We welcome contributions from field observations, laboratory experiments, and numerical modeling to elucidate the mechanisms acting on geologic materials over a wide range of conditions, length scales, and time scales.
Primary Convener:  Kathryn M. Kumamoto, University of Minnesota - Twin Cities, Department of Earth and Environmental Sciences, Minneapolis, United States
Conveners:  Christopher Thom, University of Pennsylvania, Department of Earth and Environmental Sciences, Philadelphia, PA, United States and Yuval Boneh, Washington University in St Louis, Earth and Planetary Sciences, St. Louis, MO, United States
Chairs:  Christopher Thom, University of Pennsylvania, Department of Earth and Environmental Sciences, Philadelphia, PA, United States, Kathryn M. Kumamoto, University of Minnesota - Twin Cities, Department of Earth and Environmental Sciences, Minneapolis, United States and Yuval Boneh, Brown University, Providence, RI, United States
OSPA Liaison:  Kathryn M. Kumamoto, University of Minnesota - Twin Cities, Department of Earth and Environmental Sciences, Minneapolis, United States

Cross-Listed:
  • T - Tectonophysics
Index Terms:

3902 Creep and deformation [MINERAL PHYSICS]
8159 Rheology: crust and lithosphere [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Strain Localization and Weakening Processes in Viscously Deforming Rocks: Numerical Modeling Based on Laboratory Torsion Experiments (208628)
Maximilian Doehmann1, Carolina Pagli2, Livia Nardini3, Erik Rybacki3 and Georg Dresen3, (1)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Geodynamic Modelling Section, Potsdam, Germany, (2)GFZ German Research Centre for Geosciences, Potsdam, Germany, (3)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany
Quantifying the Variation in Shear Zone Character with Depth: a Case Study from the Simplon Shear Zone, Central Alps (224801)
Tarryn Kim Cawood, University of Southern California, Los Angeles, CA, United States and John P Platt, Univ Southern California, Los Angeles, United States
Dauphiné twinning microstructure in naturally deformed quartzites (260797)
Jeffrey M Rahl, Washington and Lee University, Lexington, VA, United States, Allen J McGrew, University of Dayton, Dayton, OH, United States and Joshua A. Fox, Washington and Lee University, Department of Geology, Lexington, VA, United States
Strength of the Subduction Plate Interface beneath the Seismogenic Zone: A Microstructural Investigation of Deformation Mechanisms within a Phyllosilicate- and Amphibole-rich Shear Zone (266114)
Caroline Seyler, University of Texas, Austin, Institute for Geophysics, Austin, United States, James D Kirkpatrick, McGill University, Earth & Planetary Sciences, Montreal, Canada and Dana Šilerová, McGill University, Montreal, QC, Canada
Development of deformation band clusters in porous quartz sandstones – Contribution from microstructural analysis and numerical modeling (270721)
Sven Philit, University of Montpellier, Geosciences Montpellier, Montpellier Cedex 05, France, Roger Soliva, Géosciences Montpellier, Université de Montpellier, CNRS, Université des Antilles, Montpellier, France and Alexandre I Chemenda, University of Nice-Sophia Antipolis, Nice, France
Effect of Different Loading Conditions on the Nucleation and Development of Shear Zones Around Material Heterogeneities (251407)
Livia Nardini1, Luiz Morales2, Erik Rybacki1 and Georg Dresen1, (1)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany, (2)ETH Zurich, Structural Geology and Tectonics Group, Geological Institute, Zurich, Switzerland
The interplay between rheology and pre-existing structures in the lithosphere and its influence on intraplate tectonics: Insights from scaled physical analogue models. (253523)
Tasca Noela Santimano, Parham Adiban and Russell Pysklywec, University of Toronto, Department of Earth Sciences, Toronto, ON, Canada
The Role of Deformation Energetics in Long-Term Tectonic Modeling  (301329)
Sabber Ahamed, University of Memphis, Memphis, TN, United States and Eunseo Choi, PhD, University of Memphis, Center for Earthquake Research and Information, Memphis, TN, United States
A Discrete Element Method Approach to Progressive Localization of Damage in Granular Rocks and Associated Seismicity (284367)
Harsh Biren Vora, Rice University, Houston, TX, United States and Julia Morgan, Rice University, Earth, Environmental and Planetary Sciences, Houston, TX, United States

See more of: Mineral and Rock Physics