V045
Subduction Initiation: Modern Processes, Ancient Products, and Numerical Models eLightning

Wednesday, 16 December 2020: 19:00-20:00
Virtual
Primary Convener:  Julia Ribeiro, Guangzhou Institute of geochemistry, Guangzhou, China; University of Texas at Dallas, Dallas, TX, United States
Conveners:  Robert J Stern, University of Texas at Dallas, Geosciences, Richardson, TX, United States, Julian A Pearce, Cardiff Univ, Cardiff, United Kingdom and Osamu Ishizuka, Tsukuba, Ibaraki, Japan
Primary Liaison:  Julia Ribeiro, University of Texas at Dallas, Dallas, TX, United States; Guangzhou Institute of geochemistry, Guangzhou, China
Chairs:  Julia Ribeiro, University of Texas at Dallas, Dallas, TX, United States; Guangzhou Institute of geochemistry, Guangzhou, China and Robert J Stern, University of Texas at Dallas, Geosciences, Richardson, TX, United States
OSPA Liaison:  Julia Ribeiro, University of Texas at Dallas, Dallas, TX, United States; Guangzhou Institute of geochemistry, Guangzhou, China
19:00
V045-01
Subduction initiation: attempted vs. sustained (Invited) (681246)
Taras Gerya, ETH Swiss Federal Institute of Technology Zurich, Zurich, Switzerland
19:03
V045-02
Passive margins and aggressive grains: Mixing, damage and incipient subduction (752645)
David Bercovici and Elvira Mulyukova, Yale University, Earth & Planetary Sciences, New Haven, CT, United States
19:06
V045-03
Conditions and Consequences of Western Pacific Subduction Initiation at ca. 50 Ma. (750115)
Michael Gurnis1, Jiashun Hu2 and Yida Li1, (1)California Institute of Technology, Seismological Laboratory, Pasadena, CA, United States, (2)California Institute of Technology, Pasadena, United States
19:09
V045-04
Dynamics of delamination as a driver of Tonga-Kermedec subduction initiation (721287)
Yida Li, California Institute of Technology, Seismological Laboratory, Pasadena, CA, United States, Michael Gurnis, California Institute of Technology, Seismological Laboratory and Division of Geological and Planetary Sciences, Pasadena, CA, United States and Rupert Sutherland, Victoria University of Wellington, Wellington, New Zealand
19:12
V045-05
Geodynamic modeling of subduction initiation and back-arc basin spreading at the IBM subduction zone (771174)
Zihua Cheng1, Fan Zhang1, Jian Lin2 and Weiwei Ding3, (1)South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China, (2)Woods Hole Oceanographic Institution, Department of Geology and Geophysics, Woods Hole, MA, United States, (3)2nd Institute of Oceanography, State Oceanic Administration, Hangzhou, China
19:15
V045-06
IODP Borehole Constraints on Timing of Eocene Compressional Plate Failure During Subduction Initiation, Northern Zealandia, Southwestern Pacific. (707224)
Wanda Stratford, GNS Science, Lower Hutt, New Zealand, Rupert Sutherland, Victoria University of Wellington, Wellington, New Zealand, Gerald R Dickens, Rice Univ, Houston, TX, United States, Peter Blum, Organization Not Listed, Washington, DC, United States and Scientific Team of IODP Drilling Leg 371
19:18
V045-07
Transition in Force Balance during Puysegur Subduction Initiation: Three-dimensional Gravity and Dynamic Models (716316)
Erin Hightower1, Michael Gurnis2, Harm J Van Avendonk3, Rupert Sutherland4, Brandon Shuck5, Yida Li1, Sean P S Gulick6 and Joann M Stock7, (1)California Institute of Technology, Seismological Laboratory, Pasadena, CA, United States, (2)California Institute of Technology, Seismological Laboratory and Division of Geological and Planetary Sciences, Pasadena, CA, United States, (3)University of Texas at Austin, Institute for Geophysics, Austin, TX, United States, (4)Victoria University of Wellington, Wellington, New Zealand, (5)University of Texas at Austin, Institute for Geophysics & Department of Geological Sciences, Austin, TX, United States, (6)University of Texas at Austin, Jackson School of Geociences, Austin, TX, United States, (7)California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States
19:21
V045-08
The First Two Million Years of Subduction Beneath the Izu-Bonin-Mariana System as Recorded in IODP Expedition 352 Cores (726313)
Mark K Reagan, University of Iowa, Department of Geoscience, Iowa City, IA, United States
19:24
V045-09
Large fluxes of water-rich, slab fluids released during subduction inception (717710)
Julia Ribeiro1, Christopher J MacLeod2, C. Johan Lissenberg3 and Americus de Chavez Perez1, (1)Guangzhou Institute of geochemistry, Guangzhou, China, (2)Cardiff University, Cardiff, United Kingdom, (3)Cardiff University, Cardiff, CF24, United Kingdom
19:27
V045-10
Enrichment of water and fluid-soluble trace elements in the Troodos Ophiolite: evidence for a near-trench origin (675319)
Dominic Woelki, National High Magnetic Field Laboratory, Tallahassee, FL, United States, Peter J Michael, University of Tulsa, Geosciences, Tulsa, OK, United States, Marcel Regelous, University of Erlangen, Erlangen, Germany and Karsten M Haase, Universitat Erlangen-Nuernberg, Erlangen, Germany
19:30
V045-12
Stable Titanium Isotopic Fractionation During Subduction Initiation of the Izu-Bonin-Mariana Arc (667190)
Sophie Page1, Julie Prytulak1, Marc-Alban Millet2 and Geoffrey M Nowell1, (1)University of Durham, Durham, United Kingdom, (2)Cardiff University, Cardiff, United Kingdom
19:33
V045-13
Titanium isotope and trace element insights into the redox evolution of the Oman ophiolite mantle sources and melts (752485)
Liam Hoare1, Johan C J Lissenberg2, Martijn Klaver2, Ian John Parkinson3, Christopher J MacLeod2 and Marc-Alban Millet2, (1)Cardiff University, Cardiff, CF24, United Kingdom, (2)Cardiff University, Cardiff, United Kingdom, (3)University of Bristol, Bristol, United Kingdom
19:36
V045-14
Highly refractory ultramafic complex from Hong’an, western Dabie orogen, central China: An ancient document for subduction initiation? (772191)
Yuchen LIU and Ma Changqian, China University of Geosciences Wuhan, Wuhan, China
19:39
Discussion
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