MR43E:
Recent Advances in Understanding Deformation Microstructures II

Submit an Abstract to this Session



Session ID#: 34729

Session Description:
Deformation microstructures (e.g., grain shapes, sizes and alignments; cracks and fractures; grain-boundary and porosity structures; crystallographic preferred orientations and misorientations) give crucial insights into the underlying processes and conditions of brittle failure and ductile flow in the Earth’s lithosphere. Through extensive optical and electron microscope studies over the past few decades, microstructures have become an indispensable tool in unravelling deformation histories, kinematics and conditions, in faults, shear zones and ice sheets. We welcome presentations that describe new methods for characterizing deformation microstructures, and that give fresh insight into how microstructures develop and evolve through time, reflect deformation conditions, and influence large-scale geodynamic processes. In addition to contributions utilizing conventional analytical methods (e.g., electron backscatter diffraction, transmission electron microscopy), we encourage submissions that use emerging techniques such as transmission Kikuchi diffraction (TKD), high-resolution EBSD, cryo-EBSD, atom probe tomography (APT), and synchrotron x-ray microtomography.
Primary Convener:  Andrew J Cross, Washington University in St Louis, St. Louis, United States
Conveners:  Brooks Proctor, USGS Geological Survey, Menlo Park, CA, United States, Elena Miranda, California State University Northridge, Northridge, CA, United States and Philip A Skemer, Washington University in St Louis, St. Louis, MO, United States
Chairs:  Andrew J Cross, Washington University in St Louis, St. Louis, United States, Elena Miranda, California State University Northridge, Northridge, CA, United States, Brooks Proctor, USGS Geological Survey, Menlo Park, CA, United States and Philip A Skemer, Washington University in St Louis, St. Louis, MO, United States
OSPA Liaison:  Andrew J Cross, Washington University in St Louis, St. Louis, United States

Cross-Listed:
  • T - Tectonophysics
Index Terms:

3902 Creep and deformation [MINERAL PHYSICS]
8010 Fractures and faults [STRUCTURAL GEOLOGY]
8012 High strain deformation zones [STRUCTURAL GEOLOGY]
8030 Microstructures [STRUCTURAL GEOLOGY]

Abstracts Submitted to this Session:

Steady-state LPO is not always reached in high-strain shear zones (245174)
Kathryn M. Kumamoto, University of Minnesota - Twin Cities, Department of Earth and Environmental Sciences, Minneapolis, United States and Jessica M Warren, University of Delaware, Earth Sciences, Newark, DE, United States
Characterization by Scanning Precession Electron Diffraction of bridgmanite and ferropericlase aggregates deformed at HP-HT (210724)
Patrick Cordier1, Billy Clitton Nzogang1, Jeremie Bouquerel2, Alexandre Mussi3, Jennifer Girard4 and Shun-ichiro Karato5, (1)University of Lille, Villeneuve d'Ascq, France, (2)University of Lille 1, Villeneuve d'Ascq, France, (3)Université de Lille, UMET, Villeneuve d'Ascq, France, (4)Yale University, Earth and Planetary Sciences, New Haven, United States, (5)Yale University, New Haven, CT, United States
Analysis of residual stress distributions in olivine using HR-EBSD mapping and EVP-FFT simulations (Invited) (208512)
Lars N Hansen, University of Oxford, Department of Earth Sciences, Oxford, United Kingdom, David Wallis, University of Cambridge, Department of Earth Sciences, Cambridge, United Kingdom, Ricardo Lebensohn, Los Alamos National Laboratory, Los Alamos, NM, United States and Angus J. Wilkinson, University of Oxford, Department of Materials, Oxford, United Kingdom
Biotite Comminution in Phyllosilicate Rich Mylonites: Microstructural and Nanostructural Observations (253514)
Joe Aslin, University of Liverpool, Liverpool, L69, United Kingdom, Elisabetta Mariani, University of Liverpool, Earth, Ocean and Ecological Sciences, Liverpool, United Kingdom and Karl Dawson, University of Liverpool, Liverpool, United Kingdom
Transient porosity pulses and microfracturing during a stress-generating retrograde metamorphic reaction (208826)
François Renard1, Xiaojiao Zheng2, Benoit Cordonnier3, Wenlu Zhu4 and Bjorn Jamtveit1, (1)University of Oslo, Oslo, Norway, (2)University of Oslo, PGP/Department of Geosciences, Oslo, Norway, (3)University of Oslo, Department of Geosciences, Physical of Geological Processes, Oslo, Norway, (4)University of Maryland, College Park, MD, United States

See more of: Mineral and Rock Physics