T12B:
Strain Localization in the Lithosphere: From Experiments to Nature I

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Session ID#: 16552

Session Description:
Strain localization occurs throughout the lithosphere and spans orders of magnitude in scale. In the upper crust, seismic and aseismic brittle faults are the primary form of localization; at higher temperatures, ductile processes dominate. A more complete understanding of processes resulting in strain localization can be provided by microfabrics. However, the interpretation of fabric found in naturally-deformed rocks can be challenging because of the complex interplay of factors such as composition, temperature, stress, and strain-rate. Due to the better control of these factors in laboratory experiments, experimental studies enable to link the observed microfabrics to those found in nature and draw conclusions towards the operative deformation mechanisms, allowing further understanding of faulting processes, earthquake dynamics and deformation localization. In this session, we invite contributions from field observations, laboratory experiments, and numerical modeling constraining deformation mechanisms and mechanical and physical properties of rocks in brittle and ductile regimes during localization processes.
Primary Convener:  Marieke Rempe, Ruhr University Bochum, Bochum, Germany
Conveners:  Anna Rogowitz, University of Vienna, Vienna, Austria, Luiz F. G. Morales, Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum GFZ, Potsdam, Germany and Giulio Di Toro, University of Manchester, SEAES, Manchester, United Kingdom
Chairs:  Giulio Di Toro, University of Manchester, SEAES, Manchester, United Kingdom and Marieke Rempe, Ruhr University Bochum, Bochum, Germany
OSPA Liaison:  Anna Rogowitz, University of Vienna, Vienna, Austria

Cross-Listed:
  • MR - Mineral and Rock Physics
Index Terms:

8012 High strain deformation zones [STRUCTURAL GEOLOGY]
8030 Microstructures [STRUCTURAL GEOLOGY]
8159 Rheology: crust and lithosphere [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Evolution of shear deformation bands in unconsolidated sediments: from outcrop studies to sandbox experiments (122084)
Christian Brandes, Leibniz University of Hannover, Hannover, Germany and David Colin Tanner, Leibniz Institute for Applied Geophysics, Hannover, Germany
Critical Velocity for Shear Localization in A Mature Mylonitic Rock Analogue (153953)
Miki Takahashi, Inst Adv Indust Sci & Tech, Tsukuba, Japan, Martijn van den Ende, Utrecht University, Department of Earth Sciences, Utrecht, 3584, Netherlands, Andre R Niemeijer, Utrecht University, Department of Earth Sciences - HPT laboratory, Utrecht, Netherlands and Christopher James Spiers, Utrecht University, Department of Earth Sciences, Utrecht, Netherlands
Weakness of serpentine minerals revealed by friction experiments under low and high temperature conditions. (186592)
Telemaco Tesei, University of Padova, Department of Geoscience, Padova, Italy, Christopher Harbord, University College London, Department of Earth Sciences, London, United Kingdom, Nicola De Paola, University of Durham, Department of Earth Sciences, Durham, DH1, United Kingdom, Cristiano Collettini, Sapienza University of Rome, Rome, Italy, Piergiorgio Scarlato, Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Roma 1, Roma, Italy and Cecilia Viti, Università degli Studi di Siena, Dipartimento di Scienze Fisiche, della Terra e dell’Ambiente, Siena, Italy
A Microphysical Model for Phyllosilicate Friction (140513)
Sabine A.M. Den Hartog, University of Liverpool, Liverpool, United Kingdom, Dan Faulkner, University of Liverpool, Liverpool, L69, United Kingdom and Christopher James Spiers, Utrecht University, Department of Earth Sciences, Utrecht, Netherlands
Investigating the material strength dependence of unstressed frictional aging (197310)
Kerry Ryan, Pennsylvania State University Main Campus, University Park, PA, United States, Chris Marone, Pennsylvania State University Main Campus, Geosciences, University Park, PA, United States and Jacques Riviere, Pennsylvania State University, Engineering Science and Mechanics, University Park, PA, United States
Viscous Flow Causes Weakening in Calcite Nanogouges Sheared at Seismic Velocity (183952)
Giacomo Pozzi1, Nicola De Paola2, Stefan Bjorklund Nielsen3 and Robert Holdsworth3, (1)University of Durham, Durham, United Kingdom, (2)University of Durham, Department of Earth Sciences, Durham, DH1, United Kingdom, (3)University of Durham, Department of Earth Sciences, Durham, United Kingdom
Insight into the different couplings involved in the weakening of faults and their effect on earthquake nucleation (174114)
Hadrien Rattez, Duke University, Civil and Environmental Engineering, Durham, NC, United States, Ioannis Stefanou, Ecole Centrale de Nantes, Nantes, France, Jean Sulem, University Paris-Est, Ecole Nationale des Ponts et Chaussées, Laboratoire Navier, Champs-sur-Marne, France, Manolis Veveakis, CSIRO Earth Science and Resource Engineering Perth, Perth, WA, Australia and Thomas Poulet, CSIRO, Mineral Resources, Perth, WA, Australia
Rheology and Seismic Potential of Experimentally-Deformed Natural Serpentinites (125033)
Julien Gasc1,2, Nadege Hilairet3, Yanbin Wang1, Tony Yu4, Thomas P Ferrand5 and Alexandre Schubnel3, (1)University of Chicago, Chicago, IL, United States, (2)Géosciences Montpellier, Montpellier Cedex 05, France, (3)CNRS, Paris Cedex 16, France, (4)The University of Chicago, Center for Advanced Radiation Sources, Chicago, United States, (5)Ecole Normale Supérieure Paris, Paris, France

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