OS54A:
Geological, Oceanographic, and Biological Processes of the Western Pacific Convergent Margins and Trenches I

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Session ID#: 35107

Session Description:
The western Pacific Ocean is dominated by major convergent plate margins and deep trenches, providing a unique natural laboratory to investigate Earth’s lithosphere-ocean-biosphere interaction, from subduction plate mantle dynamics, to deep ocean circulation and mixing, to microorganisms in the hadal extreme environment. The last few years have witnessed major progress by the international community in multi-disciplinary investigations of the Mariana, Izu-Bonin, Japan, and other western Pacific trench systems. This session will highlight these recent advances, promote inter-disciplinary exchanges, and enhance further international collaborations. We welcome contributions from a wide spectrum of research: (1) Geology, geophysics, and geodynamics of the subduction process and convergent plate margins; (2) Petrology and geochemistry of margin volcanism; (3) Physical and chemical oceanography of the deep ocean circulation, mixing, and interaction with mid- and upper ocean layers; (4) Microbiology of the water column and sediments; and (5) Interaction between geological, oceanographic, and biological processes.
Primary Convener:  Jian Lin, Woods Hole Oceanographic Institution, Department of Geology and Geophysics, Woods Hole, MA, United States; Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
Conveners:  Robert J Stern, University of Texas at Dallas, Geosciences, Richardson, TX, United States, Yasuhiko Ohara, Nagoya University, Nagoya, Japan and Chuanlun Zhang, Southern University of Science & Technology, Department of Ocean Science and Engineering, Shenzhen, China
Chairs:  Jian Lin, Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Woods Hole Oceanographic Institution, Department of Geology and Geophysics, Woods Hole, MA, United States, Chuanlun Zhang, Southern University of Science & Technology, Department of Ocean Science and Engineering, Shenzhen, China, Robert J Stern, University of Texas at Dallas, Dept. of Sustainable Earth Systems Sciences, Richardson, TX, United States and Yasuhiko Ohara, Hydrographic and Oceanographic Department of Japan, Tokyo, Japan
OSPA Liaison:  Chuanlun Zhang, Southern University of Science & Technology, Department of Ocean Science and Engineering, Shenzhen, China

Cross-Listed:
  • B - Biogeosciences
  • PP - Paleoceanography and Paleoclimatology
  • T - Tectonophysics
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

8104 Continental margins: convergent [TECTONOPHYSICS]
8170 Subduction zone processes [TECTONOPHYSICS]
8413 Subduction zone processes [VOLCANOLOGY]

Abstracts Submitted to this Session:

A Subducted Seamount Revealed: 2016, NOAA OER Deepwater Exploration of the Marianas (Invited) (246209)
Patricia B Fryer, University of Hawaii at Manoa, Honolulu, HI, United States, Christopher Kelley, University of Hawaii, Hawaii Undersea Research Laboratory, Honolulu, HI, United States, Shirley A. Pomponi, Florida Atlantic University, Harbor Branch Oceanographic Institute, Fort Pierce, FL, United States, Deborah Glickson, Florida Atlantic University, Marine Biomedical & Biotechnology Research, Boca Raton, FL, United States and Diva Amon, Benioff Ocean Sciences Laboratory - UC Santa Barbara, Santa Barbara, United States
Enhanced and asymmetric melting beneath the southern Mariana back-arc spreading ridge under the influence of the Pacific plate subduction (250947)
Tetsuo Matsuno, Kobe University, Kobe, Japan, Nobukazu Seama, Kobe Univ, Kobe, Japan, Haruka Shindo, Kobe University, Kobe, Hyogo, Japan, Yoshifumi Nogi, National Institute of Polar Research (NIPR), Tachikawa, Japan and Kyoko Okino, AORI, Univ. Tokyo, Kashiwa, Japan
Subduction Initiation Existed Along the Ancient Continent Margins? Evidence of U-Pb ages of zircons from the Bonin Trench, Japan (235736)
Yi-Bing Li, CAGS Chinese Academy of Geological Sciences, Institute of Geology, Beijing, China, Julian A. Pearce, Cardiff University, School of Earth & Ocean Sciences, Cardiff, United Kingdom, Jeffrey G. Ryan, University of South Florida, Department of Geology, Tampa FL, United States, Xian-Hua Li, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China, Satoru Haraguchi, Japan Agency for Marine-Earth Science and Technology, Department of Solid Earth Geochemistry, Yokosuka, Japan, Tsuyoshi Iizuka, The University of Tokyo, Department of Earth and Planetary Science, Tokyo, Japan, Yoshiaki Kon, National Institute of Advanced Industrial Science and Technology, Institute for Geo-Resources and Environment, Tokyo, Japan, Shinji Yamamoto, Yokohama National University, Graduate School of Environment and Information Sciences, Yokohama, Japan, Yusuke Sawaki, The University of Tokyo, Graduate School of Arts and Sciences, Tokyo, Japan, Teruaki Ishii, Fukada Geological Institute, Tokyo, Japan and Shigenori Maruyama, Tokyo Institute of Technology, Department of Earth and Planetary Science, Tokyo, Japan
Chemical Characteristics of Seawater and Sediment in the Yap Trench (234735)
Haibing Ding, Ocean University of China, Key Laoboratory of Marine Chemistry and Technology, Ministry of Education, Qingdao, China, ChengJun Sun, First Institute of Oceanography, State Oceanic Administration, Qingdao, China and Guipeng Yang, Ocean University of China, Qingdao, China
The Oceanic Temperature Variance near the Bottom of the Southern Mariana Trench (235418)
Yuan-Zheng Lu1, Xian-Rong Cen2, Shuang-Xi Guo1, Sheng-Qi Zhou2, Guang-Hui Han3 and Jian Lin4,5, (1)State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China, (2)State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Acaademy of Sciences, Guangzhou, China, (3)Ocean Net Technology Co.,Ltd, Guangzhou, China, (4)Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (5)Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
Rapid subsidence along the Kerama Gap on the Ryukyu Arc, northwestern Pacific (223013)
Kohsaku Arai, Geological Survey of Japan, AIST, Tsukuba, Ibaraki, Japan, Takahiko Inoue, Geology and Geoinformation, Tsukuba, Ibaraki, Japan and Tomoyuki Sato, Geological Survey of Japan, AIST, Central 7, 1-1-1, Higashi, Tsukuba, Japan

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