T032
Mechanical and Geometrical Evolution of Faults: from the Earth’s surface to the Seismogenic Zone
Session ID#: 79773
Session Description:
The manner in which faults are treated has rapidly changed over the last few decades. The simplistic view of a fault as a discrete 2D plane has been replaced by a view that regards faults as 3D features with a complex structure that consists of different zones with widely variable petrophysical characteristics. This complexity is reflected in the highly diverse behavior of faults and thus fault analysis requires a wide range of concepts and tools. We solicit a broad spectrum of contributions that cover the topics of “fault mechanics”, “fault geometries”, “fault kinematics” and “fault behavior” (rupturing and creeping), using geological outcrop studies, geophysical methods (not restricted to the near-surface), experiments (friction or sand-box models) and numerical modeling studies. Especially welcome are holistic studies that combine these different approaches to achieve a better understanding of faults and outcrop studies of faults that reflect the processes in the seismogenic zone.
Index Terms:
8118 Dynamics and mechanics of faulting [TECTONOPHYSICS]
Primary Convener: Christian Brandes, Leibniz University of Hannover, Hannover, Germany
Convener: David Colin Tanner, Leibniz Institute for Applied Geophysics, Hannover, Germany
Primary Liaison: Christian Brandes, Leibniz University of Hannover, Hannover, Germany
EVIDENCE OF ACTIVE REVERSE FAULTING AND A LEFT-STEPPING SAN ANDREAS FAULT (MISSION CREEK STRAND) IN THE EASTERN SAN BERNARDINO MOUNTAINS, SOUTHERN CALIFORNIA (499584)
Jesse Waco, San Jose State University, San Jose, CA, United States and Kimberly Blisniuk, San Jose State University, Department of Geology, San Jose, CA, United States
Characterization of a fault gouge region of the Median Tectonic Line in Shikoku, southwestern Japan (500738)
Michiharu Ikeda1, Takeshi Tsuji2, Tomohiro Tsuji3, Kozo Onishi4 and Naoki Nishizaka4, (1)Shikoku Research Institute Inc, Takamatsu, Japan, (2)Kyushu University, Department of Earth Resources Engineering, Fukuoka, Japan, (3)Yamaguchi Univershity, Department of Earth Sciences, Yamaguchi, Japan, (4)Shikoku Electric Power Co. Inc., Takamatsu, Japan
Beyond Byerlee Friction, Weak Faults and Implications for Slip Behaviour (501681)
Cristiano Collettini1, Telemaco Tesei2, Marco Maria Scuderi1, Brett M Carpenter3 and Cecilia Viti4, (1)Sapienza University of Rome, Rome, Italy, (2)University of Perugia, Perugia, Italy, (3)INGV National Institute of Geophysics and Volcanology, Rome, Italy, (4)Università degli Studi di Siena, Dipartimento di Scienze Fisiche, della Terra e dell’Ambiente, Siena, Italy
Imaging of the 1912 Ganos Earthquake Rupture Zone using Fault Zone Head Waves (505507)
Burcak Gorgun1, Esref Yalcinkaya1, Ethem Gorgun1, Marco Bohnhoff2 and Seyedehbita Najdahmadi3, (1)Istanbul University - Cerrahpasa, Department of Geophysical Engineering, Istanbul, Turkey, (2)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany, (3)Deutsches GeoForschungsZentrum GFZ, Potsdam, Germany
Source Mechanisms and stress field of the 2017 northern Aegean Sea earthquake sequences (505600)
Ethem Gorgun, Istanbul University - Cerrahpasa, Department of Geophysical Engineering, Istanbul, Turkey, Dogan Kalafat, Bogazici University, Kandilli Observatory and Earthquake Research Institute, Istanbul, Turkey and Kivanc Kekovali, B.U. KANDILLI OBSERVATORY &ERI., Istanbul, Turkey
Deformation Bands Near Parkfield, California: Implications for Deformation in the San Andreas Fault System (508143)
Sarah Titus1, Kate Nootenboom1, Nora Mertz1, Peter Lindquist2, Emily Houlihan3 and Chelsea Scott4, (1)Carleton College, Northfield, MN, United States, (2)University of Vermont, Burlington, VT, United States, (3)University of California Davis, Davis, CA, United States, (4)Arizona State University, Tempe, AZ, United States
Paleostress analysis and fault property of the Median Tectonic Line in the central Shikoku, southwest Japan (526180)
Hideto Uchida1, Michiharu Ikeda2, Takeshi Tsuji3, Kozo Onishi4 and Naoki Nishizaka4, (1)Shikoku Research Institute Inc, Takamatsu, Japan, (2)Shikoku Research Inst, Kagawa, Japan, (3)International Institute for Carbon-Neutral Energy Research, Kyushu University, Fukuoka, Japan, (4)Shikoku Electric Power Co. Inc., Takamatsu, Japan
Quantifying Surface Roughness Development of Experimentally Sheared Fault Surfaces (536502)
Agathe Eijsink, MARUM - University of Bremen, Bremen, Germany, James D Kirkpatrick, McGill University, Earth & Planetary Sciences, Montreal, QC, Canada and Matt Ikari, MARUM, University of Bremen, Bremen, Germany
Characterizing deformation surrounding the Húsavík-Flatey fault in northern Iceland through statistical analysis of structural and paleomagnetic data (551741)
Natalie Hummel1, Sarah Titus2, Seth Waag-Swift1, Paul Ashwell3 and Maxwell Christopher Brown4, (1)Carleton College, Department of Geology, Northfield, MN, United States, (2)Carleton College, Northfield, MN, United States, (3)University of Canterbury, Christchurch, New Zealand, (4)Helmholtz-Zentrum Potsdam, Postdam, Germany
Stepovers and bends of strike-slip faults: mechanics of fault evolution and rupture behaviors (554975)
Mian Liu, University of Missouri, Geological Sciences, Columbia, MO, United States, Hui Wang, China Earthquake Administration, Institute of Earthquake Sciences, Beijing, China and Benchun Duan, Texas A&M University, College Station, TX, United States
Fault Rupture Analysis of M6.5 Aceh 2016 Earthquake, Indonesia (561773)
David P. Sahara1, Dian Kusumawati1, Sri Widiyantoro2, Andri D Nugraha1, Zulfakriza Zulfakriza2 and Nanang T Puspito1, (1)Institut Teknologi Bandung, Global Geophysics Research Group, Bandung, Indonesia, (2)Institut Teknologi Bandung, Bandung, Indonesia
An exceptionally exposed seismogenic source in the Atacama Desert: The Bolfin Fault Zone (Chile) (561813)
Rodrigo Gomila1, Erik Jensen Siles2, Michele Fondriest1, Simone Masoch1, Thomas M Mitchell3, Giulia Magnarini3, Giorgio Pennacchioni1, Jose M Cembrano4,5 and Giulio Di Toro1, (1)University of Padova, Department of Geosciences, Padova, Italy, (2)National Research Center for Integrated Natural Disasters Management (CIGIDEN), Santiago, Chile, (3)University College London, Department of Earth Sciences, London, United Kingdom, (4)Pontifical Catholic University of Chile, Santiago, Chile, (5)Andean Geothermal Center of Excellence (CEGA, FONDAP-CONICYT), Santiago, Chile
Brittle-ductile transition in porous tuff breccia from the Miocene Anamizu Formation, Noto Peninsula: constrains from tri-axial deformation experiments (569460)
Shin-ichi Uehara, Toho University, Chiba, Japan, Takahiro Iida, CERES, Inc., Abiko, Japan and Kazuo Mizoguchi, CRIEPI, Abiko, Japan
Quantifying the Death of Growth Faults on a Passive Margin --- Evidence from 3D Seismics within the Otway Basin, Australia. (575705)
David Colin Tanner1, Jennifer Ziesch1,2 and Charlotte M Krawczyk1,3, (1)Leibniz Institute for Applied Geophysics, Hannover, Germany, (2)Landesamt für Bergbau, Energie und Geologie, Hannover, Germany, (3)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany
Seismic rupture on propagating faults: Off-fault fan, splay faults and wing cracks (580153)
Simon Preuss1, Jean-Paul Ampuero2, Taras Gerya1 and Ylona van Dinther3, (1)ETH Swiss Federal Institute of Technology Zurich, Zurich, Switzerland, (2)Université Côte d'Azur, CNRS, IRD, OCA, Géoazur, Valbonne, France, (3)ETH Zurich, Zurich, Switzerland
The effect of weathering on physical properties of granitic fault rocks (580439)
Jae Hoon Kim, Korea University, Earth and Environmental Science, Seoul, Korea, Republic of (South), Jin-Han Ree, Korea University, Department of Earth and Environmental Sciences, Seoul, South Korea and Wataru Tanikawa, JAMSTEC, Nankoku, Kochi, Japan
Complex Faulting Through the Gulf of Guayaquil, Ecuador (581302)
Marc M Regnier1, Ponce Gabriela2, Marianne Saillard1, Audin Laurence3, Sandro Vaca2, Alexandra Patricia Alvarado2 and Mario Calixto Ruiz4, (1)Géoazur - Université Côte d'Azur - IRD - CNRS - Observatoire de la côte d'Azur, Valbonne, France, (2)Instituto Geofísico de la Escuela Politécnica Nacional, Quito, Ecuador, (3)IRD, CNRS, Université Grenoble Alpes, ISTerre, Grenoble, France, (4)Instituto Geofísico, Escuela Politécnica Nacional, Quito, Ecuador
Complex multi-fault earthquake rupture recorded by pseudotachylytes from the Ikertôq shear zone, western Greenland (586182)
Joseph L Allen1, Colin A Shaw2, William J Allen1, Miranda T Basconi1 and Lindsey R Deskins1, (1)Concord University, Physical Sciences, Athens, WV, United States, (2)Montana State University, Bozeman, MT, United States
The Doty Fault: what is its place in modern crustal deformation of southwest Washington? (586265)
Megan L Anderson1, Todd Lau1, Wesley von Dassow1, Tabor Reedy1, Andrew Sadowski2, Alison Elizabeth Horst1, Alec Lockett1, Rebeca Becerra1, Connor Toth1, Cat Samson1, Alexander Steely1 and Michael Polenz1, (1)Washington State Department of Natural Resources, Washington Geological Survey, Olympia, WA, United States, (2)Washington State Department of Natural Resources, Washington Geological Survey, Ellensburg, WA, United States
Crustal-scale mechanical heterogeneity along a low-angle normal fault: Funeral Mountains, California (614720)
Brandon Michael Lutz1, Gary J Axen1, Michael L Wells2 and Richard A Ketcham3, (1)New Mexico Institute of Mining and Technology, Socorro, NM, United States, (2)Department of Geoscience, University of Nevada, Las Vegas, Las Vegas, NV, United States, (3)Univ Texas-Austin, Austin, TX, United States
Geometry of normal faulting along the east side of the San Joaquin Valley from borehole geophysics and implications for groundwater migration (622548)
Zack Levinson1, Michael J Stephens2 and David Shimabukuro1, (1)California State University Sacramento, Geology Department, Sacramento, CA, United States, (2)U.S. Geological Survey, Sacramento, CA, United States
Evaluating Strike-Slip Fault Evolution with laboratory experiments and 2D Convolutional Neural Networks (625608)
Laainam Chaipornkaew1, Michele L Cooke2, Hanna Elston2, Tapan Mukerji1 and Stephan A Graham1, (1)Stanford University, Stanford, CA, United States, (2)University of Massachusetts Amherst, Amherst, MA, United States
Insight into the Stress Field of the Southern Los Angeles Basin, California Determined from Borehole Breakout and Drilling Induced Fracture Analysis (630774)
Justin O'Neil Kain1, Patricia Persaud1 and Joann M Stock2, (1)Louisiana State University, Department of Geology and Geophysics, Baton Rouge, LA, United States, (2)California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States
