T51E:
Exploring Subduction Initiation Processes and Subduction Zone Dynamics: New Insights from Scientific Drilling, Marine Geophysics, and Ophiolites II Posters


Submit an Abstract to this Session


Session ID#: 47413

Session Description:
Fundamental processes controlling the genesis and recycling of the earth'€™s crust are linked to the dynamics of subduction initiation, and the evolution of mature subduction zones through time. Constraining such processes requires a combination of multidisciplinary studies, including ocean-drilling expeditions, seafloor geophysical and seismic exploration, field analyses of ophiolites preserved in mountain belts, and modeling.  New data from these areas are advancing knowledge of the pre-existing structure of the plates, the initial stages of subduction initiation and arc inception and finally the development of mature subduction zones and mature arc settings. This interdisciplinary session solicits contributions from recent and past scientific drilling projects (IODP/ICDP), imaging structures and geophysical characteristics of oceanic lithosphere and nascent subduction zones, and recent advances in field, laboratory, and modeling studies constraining subduction processes from inception to arc development.

 

Primary Convener:  Joann M Stock, California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States
Conveners:  Brandon Shuck, University of Texas at Austin, Institute for Geophysics & Department of Geological Sciences, Austin, TX, United States, Anders John McCarthy, University of Bristol, School of Earth Sciences, Bristol, United Kingdom and Marco Maffione, University of Birmingham, School of Geography Earth and Environmental Sciences, Birmingham, B15, United Kingdom
Primary Liaison:  Brandon Shuck, University of Texas at Austin, Institute for Geophysics & Department of Geological Sciences, Austin, TX, United States
Chairs:  Anders John McCarthy, University of Lausanne, Lausanne, Switzerland and Brandon Shuck, University of Texas at Austin, Institute for Geophysics & Department of Geological Sciences, Austin, TX, United States
OSPA Liaison:  Joann M Stock, California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States

Cross-Listed:
  • OS - Ocean Sciences
  • S - Seismology
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

3036 Ocean drilling [MARINE GEOLOGY AND GEOPHYSICS]
3613 Subduction zone processes [MINERALOGY AND PETROLOGY]
7240 Subduction zones [SEISMOLOGY]
8140 Ophiolites [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Initiation of the Cascade Arc Following Accretion of the Siletzia Terrane (395091)
Jeffrey H Tepper, University of Puget Sound, Geology, Tacoma, WA, United States
Geochronology, geochemistry and significance of the Jiangyema ophiolite in the western YarlungZangbo Suture Zone (401106)
Ye Lu, Yajuan Yuan, Chi Xu, Xiao Zhang and Bin Xia, Sun Yat-sen University, Guangzhou, China
A new deep seismic structure across the southernmost Mariana Trench: Implications for arc magmatism, initial arc rifting and plate hydration (427328)
Kuiyuan Wan1, Jian Lin2,3, Shaohong Xia4, Jinlong Sun1, Min Xu5, Zhiyuan Zhou6, Xin Zeng7 and Huilong Xu1, (1)SCSIO South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China, (2)Woods Hole Oceanographic Institution, Department of Geology and Geophysics, Woods Hole, United States, (3)Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China, (4)South China Sea Institute of Oceanology, Guangzhou, China, (5)CAS Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Guangzhou, China, (6)SCSIO South China Sea Institute of Oceanology, Chinese Academy of Sciences, Key Laboratory of Ocean and Marginal Sea Geology, Guangzhou, China, (7)South China Sea Institute of Oceanology, Key Laboratory of Marginal Sea Geology, Guangzhou, China
Deformation processes in a transtentional mantle shear zone within fore-arc oceanic lithosphere: Mavrovouni shear zone, Pindos Mts, Greece (443960)
Basil Tikoff, Univ Wisconsin, Madison, United States, Vasileios Chatzaras, University of Sydney, School of Geosciences, Sydney, Australia and Martyn R. Drury, Utrecht University, Utrecht, Netherlands
Arc foundations: a lower crustal record of subduction initiation in the Izu-Bonin forearc (444415)
Matthew Phillip Loocke, University of Texas at Arlington, Shimadzu Center for Environmental, Forensics and Material Science, Arlington, United States and Jonathan E Snow, Louisiana State University, Department of Geology & Geophysics, Baton Rouge, LA, United States
Subduction Initiation at Passive Margins and Amagmatic Basin Closure: The Revival of Ampferer-Type Subduction and the Formation of Alpine-type Orogens (353787)
Anders John McCarthy1, Geoffroy Mohn2, Lorenzo G. Candioti3, Julie Tugend4, Cyril Chelle-Michou1, Othmar Müntener3, Stefan M Schmalholz3, Richard J Arculus5 and Jon D Blundy1, (1)University of Bristol, School of Earth Sciences, Bristol, United Kingdom, (2)University of Cergy-Pontoise, Cergy-Pontoise, France, (3)University of Lausanne, Institute of Earth Sciences, Lausanne, Switzerland, (4)Université de Strasbourg, Strasbourg, France, (5)Australian National University, Research School of Earth Sciences, Canberra, Australia
Conditions of spontaneous subduction at transform faults (355481)
Diane Arcay1,2, Serge Lallemand3, Sarah Abecassis1 and Fanny Garel4,5, (1)CNRS, Paris Cedex 16, France, (2)Géosciences Montpellier, Montpellier, France, (3)UMR5243 Geosciences Montpellier, CNRS, Montpellier, France, (4)CNRS & Univ. Montpellier, Géosciences Montpellier, Montpellier Cedex 05, France, (5)University of Montpellier, Montpellier, France
The TROODOS Experiment: Tomography and Receiver function Observations of an Ophiolite using Data Obtained from Seismology (367295)
Ian D Bastow1, Christopher Steven Steven Ogden2, Rita Kounoudis1, Sylvana Pilidou3, Iordanis Dimitriadis3, Clothilde Venereau4, Amy Gilligan5,6, Bughda Wumuti6 and Costas Constantinou3, (1)Imperial College London, Department of Earth Science and Engineering, London, SW7, United Kingdom, (2)Imperial College London, Department of Earth Science and Engineering, London, United Kingdom, (3)Geological Survey Department of Cyprus, Nicosia, Cyprus, (4)Imperial College London, London, SW7, United Kingdom, (5)University of Aberdeen, Geophysics, Aberdeen, United Kingdom, (6)Imperial College London, London, United Kingdom
Gravity Modeling of Crustal Thickness and Lithospheric Structure of the Puysegur Trench, South Island, New Zealand: Insights into Subduction Initiation (395239)
Erin Hightower, Jet Propulsion Laboratory, Pasadena, United States, Michael Gurnis, California Institute of Technology, Seismological Laboratory, Pasadena, CA, United States, Harm J Van Avendonk, University of Texas at Austin, Institute for Geophysics, Austin, TX, United States, Joann M Stock, California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States, Sean P S Gulick, University of Texas, Institute for Geophysics, Austin, United States, Rupert Sutherland, Victoria University of Wellington, Wellington, New Zealand and Brandon Shuck, University of Texas at Austin, Institute for Geophysics & Department of Geological Sciences, Austin, TX, United States
Crustal structure of the Puysegur Trench from SISIE ocean-bottom seismic refraction data (375342)
Harm J Van Avendonk, University of Texas at Austin, Institute for Geophysics, Austin, TX, United States, Michael Gurnis, California Institute of Technology, Seismological Laboratory, Pasadena, CA, United States, Sean P S Gulick, University of Texas, Institute for Geophysics, Austin, United States, Joann M Stock, California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States, Rupert Sutherland, Victoria University of Wellington, Wellington, New Zealand, Brandon Shuck, University of Texas at Austin, Institute for Geophysics & Department of Geological Sciences, Austin, TX, United States, Erin Hightower, Jet Propulsion Laboratory, Pasadena, United States, Jiten Patel, Victoria University Wellington, School of Geography, Environment and Earth Sciences, Wellington, New Zealand and SISIE Team
From Rifting to Subduction: Evidence for the Role of Past Tectonics Influencing Subduction Initiation at the Puysegur Trench, New Zealand (381677)
Brandon Shuck, University of Texas at Austin, Institute for Geophysics & Department of Geological Sciences, Austin, TX, United States, Sean P S Gulick, University of Texas, Institute for Geophysics, Austin, United States, Harm J Van Avendonk, University of Texas at Austin, Institute for Geophysics, Austin, TX, United States, Michael Gurnis, California Institute of Technology, Seismological Laboratory, Pasadena, CA, United States, Joann M Stock, California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States, Rupert Sutherland, Victoria University of Wellington, Wellington, New Zealand, Erin Hightower, Jet Propulsion Laboratory, Pasadena, United States, Jiten Patel, Victoria University Wellington, School of Geography, Environment and Earth Sciences, Wellington, New Zealand, Steffen Saustrup, Univ of Texas Inst for Geophys, Austin, TX, United States and SISIE Shipboard Science Party
Morphology of Fault Scarps Associated With Subduction Initiation at the Puysegur Trench (467487)
Joann M Stock, California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States, Michael Gurnis, California Institute of Technology, Seismological Laboratory, Pasadena, CA, United States, Sean P S Gulick, University of Texas, Institute for Geophysics, Austin, United States, Harm J Van Avendonk, University of Texas at Austin, Institute for Geophysics, Austin, TX, United States, Rupert Sutherland, Victoria University of Wellington, Wellington, New Zealand, Brandon Shuck, University of Texas at Austin, Institute for Geophysics & Department of Geological Sciences, Austin, TX, United States, Erin Hightower, Jet Propulsion Laboratory, Pasadena, United States, Jiten Patel, Victoria University Wellington, School of Geography, Environment and Earth Sciences, Wellington, New Zealand and SISIE Shipboard Science Party
Various metamorphism and serpentinization of mafic and ultramafic clasts from the Mariana serpentinite seamounts (377084)
Yuji Ichiyama, Chiba University, Chiba, Japan, Katsuyoshi Michibayashi, Nagoya University, Nagoya, Japan and Patricia B Fryer, Univ Hawaii, Honolulu, HI, United States
Record of asynchronous onset of plate tectonics in different cratons (380208)
Maojiang Wang1, Shuwen LIU1 and Esteban Gazel2, (1)Peking University, School of Earth and Space Sciences, Beijing, China, (2)Cornell University, Department of Earth and Atmospheric Sciences, Ithaca, NY, United States
Subduction Initiation at the Scotia Sea: Effects of the Thickened Arc Crust (374286)
Wei Leng, University of Science and Technology of China, Hefei, China and Hong Peng, Seattle, WA, United States

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