DI012
Seismic Anisotropy and Mantle Dynamics: Observations, Models, and Experiments

Session ID#: 159258

Session Description:
Constraining and interpreting the anisotropic properties of the solid Earth is fundamental to understanding mantle dynamics from the lithosphere to the core. The anisotropic structure of Earth's interior reflects its deformation history and the resulting fabrics are sensitive to a host of important properties including pressure and temperature conditions, mineral assemblages, presence of partial melt, and volatile contents. However, constraining and interpreting seismic anisotropy has been a challenge due to the inaccessibility of the mantle and uncertainties in observations, models, and experiments. The growing volume of seismic data together with novel analysis methods has generated increasingly robust measurements of anisotropic properties placing new constraints on lithospheric deformation mechanisms, mantle circulation, plate boundary dynamics, and core-mantle boundary processes. Detailed interpretation of geophysical data is driven by experimental advances targeting the rheology of Earth materials at relevant conditions. At the same time, computational developments allow for the simulation of geologic processes at unprecedented resolution permitting direct comparison to observations. Collaboration between these fields will bring new and exciting insights into the dynamics of our planet's interior. We welcome submissions on the anisotropic properties of the solid earth and their influence on its behavior. Contributions from geophysical and geologic observations (seismology, magnetotellurics, structural analysis of natural samples), geodynamics, and experimental and computational studies on rheology and deformation are encouraged.
Index Terms:

3902 Creep and deformation [MINERAL PHYSICS]
7208 Mantle [SEISMOLOGY]
7270 Tomography [SEISMOLOGY]
8124 Earth's interior: composition and state [TECTONOPHYSICS]

Primary Convener:  Brandon VanderBeek, University of Padua, Dipartimento di Geoscienze, Padua, Italy
Conveners:  Manuele Faccenda, University of Padua, Dipartimento di Geoscienze, Padova, Italy, Maureen D Long, Yale University, Department of Earth and Planetary Sciences, New Haven, United States and Andrew Birkey, University of Delaware, Department of Earth and Planetary Sciences, Newark, United States
Student/Early Career Convener:  Poulami Roy, Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany
 
Seismological Evidence for Girdled Olivine Fabric in Oceanic Lithosphere and Implications for Mantle Deformation Processes During Seafloor Spreading (Invited) (1045063)
Joshua B Russell1, James B Gaherty2, Hannah Mark3, Greg Hirth4, Lars N Hansen5, Daniel Lizarralde6, John A Collins7 and Rob L Evans3, (1)Brown University, Providence, RI, United States, (2)School of Earth and Sustainability, Northern Arizona University, Flagstaff, United States, (3)Woods Hole Oceanographic Institution, Woods Hole, United States, (4)Brown Univeristy, Department of Earth, Environmental, and Planetary Sciences, Providence, RI, United States, (5)University of Minnesota - Twin Cities, Department of Earth and Environmental Sciences, Minneapolis, United States, (6)Woods Hole Oceanographic Institution, Geology and Geophysics, Woods Hole, MA, United States, (7)WHOI, Woods Hole, MA, United States
 
Exploring the Cascadia slab structure coupling 3D thermomechanical and CPO modeling. (Invited) (1045357)
Menno Fraters, University of California Davis, Davis, CA, United States, Magali I Billen, UC Davis, Davis, CA, United States, John B Naliboff, University of California Davis, Davis, United States, Lydia Staisch, University of Michigan, Ann Arbor, United States and Janet Tilden Watt, U.S. Geological Survey, Santa Cruz, United States
 
High-resolution constraints on radial anisotropy in the North American lithosphere (1046502)
Anant Hariharan, Brown University, Department of Earth, Environmental, and Planetary Sciences, Providence, RI, United States and Colleen A Dalton, Brown University, Department of Earth, Environmental and Planetary Sciences, Providence, RI, United States
 
Exploring Depth-Dependency of Seismic Anisotropy Beneath Canada: What are the Relative Roles of Lithospheric Fabric and Active Mantle Flow from Craton to Cordillera? (1055896)
Fiona Ann Darbyshire, University of Quebec at Montreal UQAM, Centre de recherche GEOTOP, Montreal, QC, Canada, Aarti Sharma, University of Manitoba, Winnipeg, MB, Canada and Andrew W Frederiksen, University of Manitoba, Earth Sciences, Winnipeg, MB, Canada
 
Influence of Melt-Peridotite Interaction on Deformation and Seismic Properties of the Upper Mantle beneath the North China Craton (1057585)
Dapeng Wen, Yongfeng Wang and Junfeng Zhang, China University of Geosciences Wuhan, Wuhan, China
 
Seismic Anisotropy and Mantle Flow beneath South China Sea using Ocean Bottom Seismometer Data (1057885)
Fansheng Kong and Jiabiao Li, Second Institute of Oceanography, Ministry of Natural Resources, Key Laboratory of Submarine Geosciences, Hangzhou, China
 
Frequency-dependent Shear Wave Splitting and Layered Anisotropy Beneath the Eastern Margin of North America (1058788)
Rajani Shrestha and Colton Lynner, University of Delaware, Earth Sciences, Newark, United States
 
Slab-driven flow at the base of the mantle beneath the northeastern Pacific Ocean (1059615)
Jonathan Wolf, Yale University, Department of Earth and Planetary Sciences, New Haven, CT, United States and Maureen D Long, Yale University, Department of Earth and Planetary Sciences, New Haven, United States
 
Two-station Rayleigh wave Tomography of Canada. (1063638)
Aarti Sharma, University of Manitoba, Winnipeg, MB, Canada, Andrew W Frederiksen, University of Manitoba, Earth Sciences, Winnipeg, MB, Canada, Fiona Ann Darbyshire, University of Quebec at Montreal UQAM, Centre de recherche GEOTOP, Montreal, QC, Canada, Omid Bagherpur Mojaver, University of Quebec at Montreal UQAM, Montreal, QC, Canada and Andrew Schaeffer, Sidney Subdivision Natural Resources Canada, Geological Survey of Canada Pacific Division, Sidney, BC, Canada
 
Is the lowermost mantle (D′′ layer) anisotropy ubiquitous? (1071453)
Padma Rao B, National Centre for Earth Science Studies, Thiruvananthapuram, India and Ravi Kumar, N.G.R.I., Hyderabad, India
 
Testing Observables for Teleseismic Shear-Wave Splitting Inversions: Ambiguities of Intensities, Parameters, and Waveforms (1073818)
Georg Rumpker, Ayoub Kaviani, Frederik Link, Miriam Christina Reiss and Abolfazl Komeazi, Goethe University Frankfurt, Frankfurt, Germany
 
Variations in Lithospheric Fabric Across the Cordillera/Shield Boundary, Western Canada (1075394)
Andrew W Frederiksen and Christian Phillips, University of Manitoba, Earth Sciences, Winnipeg, MB, Canada
 
Microstructures and anisotropy in pyrolite at lower mantle pressures and temperatures (1076288)
Sebastien Merkel1, Jeffrey Gay1, John Keith Magali1, Estelle Ledoux1, Matthias Krug2, Julien Chantel1 and Carmen Sanchez-Valle2, (1)Univ. Lille, UMET - CNRS, Lille, France, (2)University of Münster, Institute for Mineralogy, Münster, Germany
 
Local Variations in Seismic Azimuthal Anisotropy Beneath the Lesser Caucasus and Armenian Plateau (1079938)
Jing-Hui Tong1, Tai-Lin Tseng1, PeiYing Patty Lin2, Khachatur Meliksetian3 and Bor-Shouh Huang4, (1)National Taiwan University, Department of Geosciences, Taipei, Taiwan, (2)Department of Earth Sciences, National Taiwan Normal University, Taipei, Taiwan, (3)Institute of Geological Sciences, Armenian National Academy of Sciences, Yerevan, Armenia, (4)Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan
 
Microstructures and seismic anisotropy of the Yuka eclogite in the North Qaidam ultrahigh-pressure metamorphic belt, NW China (1084458)
Munjae Park, Chungbuk National University, Cheongju, Korea, Republic of (South) and Haemyeong Jung, Seoul National University, School of Earth and Environmental Sciences, Seoul, South Korea
 
Slab Geometry and Upper Mantle Flow Patterns Beneath the Mediterranean Revealed by 3-D Anisotropic P-Wave Tomography (1085773)
Francesco Rappisi, University of Padua, Padua, Italy, Brandon VanderBeek, University of Padova, Padova, Italy and Manuele Faccenda, Università di Padova, Dipartimento di Geoscienze, Padova, Italy
 
Imaging Upper Mantle Anisotropic Structure Using Teleseismic Shear Wave Delays: an Application to the Cascadia Subduction Zone (1086251)
Rosalia Lo Bue, Brandon VanderBeek, Francesco Rappisi and Manuele Faccenda, Università di Padova, Dipartimento di Geoscienze, Padova, Italy
 
Reversible-Jump, Markov-Chain Monte Carlo tomographic inversion with Voronoi projections for anisotropic structure in a subduction environment (1088839)
Gianmarco Del Piccolo1, Brandon VanderBeek1, Manuele Faccenda1 and Andrea Morelli2, (1)University of Padova, Padova, Italy, (2)Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Bologna, Bologna, Italy
 
Investigation of flow field beneath the Kuril-Kamchatka subduction zone from seismic anisotropy (1103826)
Ayoub Kaviani1, Georg Rumpker1, Christoph Sens-Schönfelder2, Abolfazl Komeazi1 and Nikolai M Shapiro3, (1)Goethe University Frankfurt, Frankfurt, Germany, (2)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany, (3)Institut de Physique du Globe de Paris, Paris, France
 
New Methods for Imaging Arbitrarily Oriented Hexagonal Seismic Anisotropy in the Upper Mantle with Teleseismic P- and S-wave Observables (1106631)
Brandon VanderBeek1, Rosalia Lo Bue2, Francesco Rappisi2 and Manuele Faccenda3, (1)University of Padua, Dipartimento di Geoscienze, Padua, Italy, (2)Università di Padova, Dipartimento di Geoscienze, Padova, Italy, (3)University of Padua, Dipartimento di Geoscienze, Padova, Italy
 
Local-S Shear Wave Splitting and Mantle Wedge Dynamics in the Alaska Aleutian Subduction Zone (1107923)
Cherilyn Toro, University of Puerto Rico Mayaguez, Geology, Mayaguez, United States, Eve Paulson, Harvey Mudd College, Geology, Claremont, United States and Colton Lynner, University of Delaware, Earth Sciences, Newark, United States
 
Seismic Anisotropy and Mantle Dynamics Associated with Slab Windows (1113055)
Hannah Mark, Woods Hole Oceanographic Institution, Woods Hole, United States, Douglas Wiens, Washington University in St. Louis, St. Louis, MO, United States and Walid Ben Mansour, Washington University in St Louis, St. Louis, MO, United States
 
Shear wave splitting and Upper Mantle Anisotropy in the Caucasus (1122248)
Luis Bernardo Martinetti, Michigan State University, Department of Earth and Environmental Sciences, East Lansing, MI, United States, Kevin G Mackey, Michigan State University, Department of Earth and Atmospheric Sciences, Lansing, MI, United States, Gurban Yetirmishli, Azerbaijan National Academy of Sciences, Department of Earth Sciences, Baku, Azerbaijan, Tea Godoladze, Institute of Earth Sciences, Ilia State University, Tbilisi, Georgia, Hektor Babayan, Institute of Geological Sciences, National Academy of Sciences of the Republic of Armenia, Yerevan, Armenia, Alexey Malovichko, Federal Research Center United Geophysical Survey of the Russian Academy of Sciences, Obninsk, Russia, Ruslan Dyagilev, Geophysical Survey Russian Academy of Sciences, Obninsk, Russia, John Nabelek, Oregon State University, CEOAS, Corvallis, OR, United States and Eric A Sandvol, University of Missouri, Department of Geological Sciences, Columbia, MO, United States
 
Variable Anisotropy in the Upper Plate of the Alaska-Aleutian Subduction Zone Examined Using Local-S Shear Wave Splitting (1122793)
Eve Paulson, Harvey Mudd College, Claremont, CA, United States, Cherilyn Toro, University of Puerto Rico Mayaguez, Geology, Mayaguez, United States and Colton Lynner, University of Delaware, Earth Science, Newark, DE, United States
 
Detecting Anisotropy from Back-Azimuth Amplitude Dependence of Sp Converted Waves (1126582)
Jeffrey J Park, Yale University, Earth & Planetary Sciences, New Haven, CT, United States, Xiaoran Chen, Rutgers University, Earth and Planetary Sciences, New Brunswick, NJ, United States and Vadim L Levin, Rutgers University, Earth and Planetary Sciences, Piscataway, NJ, United States
 
Evolution of Crystal Preferred Orientation in the Forearc Mantle Wedge Corner in Subduction Zones (1126836)
Lindsey M Kenyon, University of Minnesota Twin Cities, Earth & Environmental Sciences, Minneapolis, MN, United States, Ikuko Wada, Department of Earth Sciences, Minneapolis, United States and Jiangheng He, Geological Survey of Canada, Pacific Geoscience Centre, Sidney, BC, Canada
 
Anisotropic Seismic Velocity in the Crust and Upper Mantle of Northeastern America from Surface Wave Tomography (1127855)
Zhongmin Tao and Aibing Li, University of Houston, EAS, Houston, TX, United States
 
S-wave isotropic and radially anisotropic velocity structure around the Mariana Trench inferred from ambient noise tomography (1136959)
Tae-shin Kim1, Sung-Joon Chang1, Michael Witek2, Sang-Mook Lee3, Younghee Kim4, Hisashi Utada5, Hitoshi Kawakatsu6, Takehi Isse7 and Nozomu Takeuchi8, (1)Kangwon National University, Chuncheon, Korea, Republic of (South), (2)Kangwon National University, Chuncheon, South Korea, (3)Seoul National Univ, School of Earth and Environmental Sciences, Seoul, South Korea, (4)Seoul National University, School of Earth and Environmental Sciences, Seoul, Korea, Republic of (South), (5)Univ Tokyo, Tokyo, Japan, (6)Earthquake Research Institute, The University of Tokyo, Tokyo, Japan, (7)The Univ. of Tokyo, Tokyo, Japan, (8)Univ of Tokyo, Ocean Hemisphere Research Center, Tokyo, Japan
 
S-wave isotropic and radially anisotropic velocity structure in the Western Pacific inferred from partitioned waveform inversion (1137390)
Jihoon Park1, Sung-Joon Chang1, Michael Witek2, Sang-Mook Lee3, Younghee Kim4, Hisashi Utada5, Hitoshi Kawakatsu6, Hajime Shiobara7, Takehi Isse8 and Nozomu Takeuchi9, (1)Kangwon National University, Chuncheon, Korea, Republic of (South), (2)Kangwon National University, Chuncheon, South Korea, (3)Seoul National Univ, School of Earth and Environmental Sciences, Seoul, South Korea, (4)Seoul National University, School of Earth and Environmental Sciences, Seoul, Korea, Republic of (South), (5)Univ Tokyo, Tokyo, Japan, (6)Earthquake Research Institute, The University of Tokyo, Tokyo, Japan, (7)The University of Tokyo, Tokyo, Japan, (8)The Univ. of Tokyo, Tokyo, Japan, (9)Univ of Tokyo, Ocean Hemisphere Research Center, Tokyo, Japan
 
Strike-slip, Transpression, or Subduction? Investigations of Seismic Anisotropy beneath the Evolving Australian-Pacific Plate Boundary South of New Zealand (1139364)
Haoran Du, Australian National University, Canberra, ACT, Australia and Caroline M Eakin, Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia
 
Signatures of the subduction/obduction processes in the lithosphere and asthenosphere beneath the Semail Ophiolites in Oman revealed by seismic anisotropy (1145339)
Abolfazl Komeazi1, Ayoub Kaviani2, Georg Rumpker1, Christian Weidle3 and Thomas Meier4, (1)Goethe University Frankfurt, Frankfurt, Germany, (2)University of Frankfurt, Frankfurt, Germany, (3)University of Kiel, Institute of Geo Sciences, Kiel, Germany, (4)Kiel University, Institute of Geosciences, Kiel, Germany
 
Complex Seismic Anisotropy beneath the Central Appalachians from SKS Splitting Intensity Tomography (1148750)
Frederik Link, Maureen D Long, Yantao Luo and Puskar Mondal, Yale University, Department of Earth and Planetary Sciences, New Haven, United States
 
Effects of Partial Melt in the Uppermost Mantle on SKS Splitting: Global Wavefield Simulations and potential Applications (1149866)
Eric Loeberich1, Jonathan Wolf1 and Maureen D Long2, (1)Yale University, New Haven, CT, United States, (2)Yale University, Department of Earth and Planetary Sciences, New Haven, United States
 
Complex Upper Mantle Dynamics beneath the Southern Korean Peninsula from Azimuthal Seismic Anisotropy Analysis (1151073)
Kyeongjun Jo, Korea University, Department of Earth and Environmental Sciences, Seoul, Korea, Republic of (South), Jung-Hun Song, Seoul National University, School of Earth and Environmental Sciences, Seoul, South Korea and Seongryong Kim, Korea University, Department of Earth and Environmental Sciences, Seoul, South Korea
 
Simultaneous Measurement of Attenuation and Velocity Anisotropy as a Probe for Mantle Melt (1154942)
Joseph Philip Robert Asplet1, James M Wookey1, Michael Kendall2, Kat Dapre1 and Mark Chapman3, (1)University of Bristol, School of Earth Sciences, Bristol, United Kingdom, (2)University of Oxford, Department of Earth Sciences, Oxford, United Kingdom, (3)University of Edinburgh, School of Geosciences, Edinburgh, United Kingdom
 
Seismic anisotropy in East Africa: Plumes, Cratons, and Magma (1155911)
Cynthia J Ebinger, Tulane University of Louisiana, New Orleans, LA, United States, Miriam Christina Reiss, Goethe University Frankfurt, Frankfurt, Germany, Ian D Bastow, Imperial College London, Department of Earth Science and Engineering, London, SW7, United Kingdom, Atalay Ayele, Addis Ababa University, Institute of Geophysics, Space Science and Astronomy, Addis Ababa, Ethiopia and Mary Karanja, University of Nairobi, Nairobi, Kenya
 
Improving Shear-wave Splitting Estimates with Multiple-taper Spectral Analysis (1157086)
William Frazer, Yale University, Earth and Planetary Science, New Haven, CT, United States, Frederik Link, Goethe University Frankfurt, Frankfurt, Germany and Jonathan Wolf, Yale University, New Haven, CT, United States
 
Shoreline crossing shear wave splitting across the Namibia passive margin (1166495)
Colton Lynner, University of Delaware, Earth Science, Newark, DE, United States
 
A Novel Approach to Inferring Depth-dependent Seismic Anisotropy from Shear-wave Splitting in Noisy Oceanic Environments (1171239)
Joseph S Byrnes, Northern Arizona University, School of Earth and Sustainability, Flagstaff, United States and James B Gaherty, School of Earth and Sustainability, Northern Arizona University, Flagstaff, United States
 
The Contrast of Depth-Dependent Seismic Azimuthal Anisotropy Beneath Alaska-Aleutian and Cascadia Subduction Systems (1181809)
Chuanming Liu1, Shane Zhang1, Mengyu Wu2, Anne Sheehan3 and Michael H Ritzwoller1, (1)University of Colorado Boulder, Department of Physics, Boulder, CO, United States, (2)University of Colorado Boulder, Department of Physics, Boulder, United States, (3)University of Colorado Boulder, Department of Geological Sciences and Cooperative Institute for Research in Environmental Sciences (CIRES), Boulder, United States
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