T045:
The Microphysics Of Plate Boundary Formation





Session ID#: 25677

Session Description:
Knowing how and why plate tectonics began is critical for understanding Earth’s surface and interior evolution, as well as that of other planets. However, it remains a mystery how plate driving forces overcome the apparent rheological strength of the lithosphere, and thereby initiate rifts, strike-slip boundaries and subduction zones. Experimental, theoretical and modeling studies, as well as observational field data, have generated various hypotheses regarding mechanisms for strain localization and weakening of the lithosphere. Microphysical rock deformation processes  - including mobility and recovery of crystalline defects, mechanics of faults and fractures, evolution of grain size and the presence of multiple phases - are of fundamental importance in advancing and testing these hypotheses.

This session invites presentations about the development and application of rock mechanics models emerging from theoretical, experimental, numerical and observational field studies, which further our understanding of formation and evolution of plate tectonics.

Primary Convener:  Elvira Mulyukova, Yale University, New Haven, CT, United States
Conveners:  Andrew J Cross, Washington University in St Louis, St. Louis, MO, United States and Jennifer Girard, Yale University, Geology & Geophysics, New Haven, CT, United States
Co-Organized with:
Tectonophysics, and Mineral and Rock Physics

Cross-Listed:
  • EP - Earth and Planetary Surface Processes
  • MR - Mineral and Rock Physics
  • P - Planetary Sciences
Index Terms:

3902 Creep and deformation [MINERAL PHYSICS]
5112 Microstructure [PHYSICAL PROPERTIES OF ROCKS]
8120 Dynamics of lithosphere and mantle: general [TECTONOPHYSICS]
8159 Rheology: crust and lithosphere [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Takehiko Hiraga, Genta Maruyama and Tadashi Nakakoji, Earthquake Research Institute, University of Tokyo, Tokyo, Japan
Laurent Montesi, University of Maryland College Park, College Park, MD, United States
Pamela A Speciale1, Whitney M Behr1, Greg Hirth2 and Leif Tokle3, (1)University of Texas at Austin, Department of Geological Sciences, Austin, TX, United States, (2)Brown Univeristy, Providence, RI, United States, (3)Brown University, Providence, RI, United States
Rishap Lamichhane, Howard University, Washington, DC, United States and Bradford J Foley, Carnegie Institution for Science, Washington, DC, United States
Bradford J Foley, Pennsylvania State University Main Campus, University Park, PA, United States
David Bercovici, Yale University, Geology & Geophysics, New Haven, CT, United States
Xiaolin Mao1, Michael Gurnis1 and Dave May2, (1)California Institute of Technology, Pasadena, CA, United States, (2)University of Oxford, Oxford, United Kingdom
Harison Wiesman, University of Minnesota Twin Cities, Physics, Minneapolis, MN, United States, Mark E Zimmerman, Univ Minnesota, Minneapolis, MN, United States and David L Kohlstedt, University of Minnesota Twin Cities, Minneapolis, MN, United States
Stephan V. Sobolev, Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Section 2.5 Geodynamic modeling group, Potsdam, Germany and Michael Brown, Univ Maryland, College Park, MD, United States
Tyler K Ambrose, David Wallis, Lars N Hansen, David J Waters and Michael P. Searle, University of Oxford, Department of Earth Sciences, Oxford, United Kingdom
Elvira Mulyukova, Yale University, New Haven, CT, United States and David Bercovici, Yale University, Geology & Geophysics, New Haven, CT, United States

See more of: Tectonophysics