Solid Earth Sciences (S)
Session Sub-category Complex & General(CG)
Session ID S-CG48
Title Ocean Floor Geoscience
Short Title Ocean Floor Geoscience
Main Convener Name Kyoko Okino
Affiliation Atmosphere and Ocean Research Institute, The University of Tokyo
Co-Convener 1 Name Keiichi Tadokoro
Affiliation Research Center for Seismology, Volcanology and Earthquake and Volcano Research Center, Nagoya University
Session Language 
J
Scope 
Most of Earth's volcanism and much of its tectonic activity occur on and beneath the seafloor. Various phenomena on the seafloor are closely linked to plate tectonics, Earth's structure and dynamics, and also related to Earth's environments through the hydrosphere and atmosphere. Seafloor-derived rocks and sediments record Earth's evolution and heat/material fluxes on the Earth. Ocean Floor Geoscience session covers a broad range of research on seafloor such as mid-ocean ridge process, subduction dynamics, arc and intraplate magmatism, crustal movement and structre, etc. Every field of research and every approach are welcomed. The session aims to encourage discussion among scientists from different study fields and to integrate our understanding of the ocean floor. The session is co-chaired by K. Okino (Univ. Tokyo), K. Tadokoro (Nagoya Univ.), T. Toki (Univ. Ryukyus), Y. Yamamoto (JAMSTEC) and N. Akizawa (Univ. Tokyo).
Presentation Format Oral and Poster presentation
Time Presentation No Title Presenter
Oral Presentation May 29 AM1
09:00 - 09:15 SCG48-01 No significant deformation at the axis of the Kuril Trench off Nemuro based on Acoustic Distant Meter survey Shoutarou Matsumoto
09:15 - 09:30 SCG48-02 Evaluation of UAV-based GNSS-A observation system specifications through a sea trial Yuto Yoshizumi
09:30 - 09:45 SCG48-03 Characterization of the ferromanganese nodules distribution around Minamitorishima Island based on an analysis of the acoustic backscatter intensity and seafloor images Wataru Sasaki
09:45 - 10:00 SCG48-04 Environmental impact assessment for the development of seafloor massive sulfides Tatsuo Fukuhara
10:00 - 10:15 SCG48-05 Verification of metal particles reportedly contained in hydrothermal ferromanganese oxides and igneous rocks in the Sea of Japan Keishiro Azami
Oral Presentation May 29 AM2
10:45 - 11:00 SCG48-06 Bathymetric Feature and Crustal Structure of the Lyra Trough in the western equatorial Pacific Ocean Futa Honda
11:00 - 11:15 SCG48-07 Spreading process of the Mariana Trough using geomagnetic anomaly data Seitaro Ono
11:15 - 11:30 SCG48-08 Dynamics of back-arc basin formation with slab stagnation Tomoeki Nakakuki
11:30 - 11:45 SCG48-09 Onset of small-scale convection beneath the oceanic plate: effects of melt depletion Momiji Senda
11:45 - 12:00 SCG48-10 Spatial distributions of the degree of melt depletion in a mid-ocean ridge-transform fault system Manabu Morishige
Oral Presentation May 29 PM1
13:45 - 14:00 SCG48-11 Possible evidence of the 17th century great earthquake off Hokkaido: Marine paleoseismology in the landward slope of the Kuril trench Toshiya Kanamatsu
14:00 - 14:15 SCG48-12 Tracking past huge earthquakes in the trench-fill deposits in a Japan Trench basin: IODP 1010-APL2 JTRACK-Deep-time Paleoseismology Ken Ikehara
14:15 - 14:30 SCG48-13 Submersible survey along the Shionomisaki submarine canyon in the Nankai Trough: Preliminary results of R/V Yokosuka YK23-10S cruis Asuka Yamaguchi
14:30 - 14:45 SCG48-14 Acoustc stratigraphy and crustal deformation in Osaka Bay after the last glacial period Hironori Otsuka
14:45 - 15:00 SCG48-15 Bathymetric and geological observation using AUV and other instruments on the East China Sea slope: wavy bedforms and channel-like structures near Oki-Danjo Hills Ryoichi Horinouchi
Oral Presentation May 29 PM2
15:30 - 15:45 SCG48-16 Marine and earth science surveys in the Southern part of Okinawa Trough: Hakuho-maru KH-23-11 cruise preliminary reports Makoto Otsubo
15:45 - 16:00 SCG48-17 Spatial variations in rift structure and associated seismicity in the southern Okinawa Trough Ryuta Arai
16:00 - 16:15 SCG48-18 Inception of Ridge-Ridge-Ridge Triple Junctions: Geomorphological Evidence and Tectonic Dynamics in the Early Back-Arc Extension of the Northern Okinawa Trough Hiroaki Koge
16:15 - 16:30 SCG48-19 In Situ Measurement of Liquid and Gas CO2 at Deep-sea Hydrothermal Vents in the Mariana Arc and Okinawa Trough using Raman Spectroscopy Tomoko Takahashi
Presentation No Title Presenter
Poster Presentation May 29 PM3
SCG48-P01 GNSS-Acoustic Observation Using the Wave Glider to Detect the Seafloor Crustal Deformation (5) Takeshi Iinuma
SCG48-P02 An ultralight and compact towed buoy system “Unit-01” for GNSS/A seafloor geodesy
-Aiming for lighter buoy with lower noise- 		Ryoya Ikuta
SCG48-P03 Time change of sound speed structure in GNSS-A observation Yusuke Yokota
SCG48-P04 Evaluation of vertical motion off Tohoku considering uncertainty in GNSS-Acoustic positioning Fumiaki Tomita
SCG48-P05 Numerical evaluation of the GNSS-A acoustic ranging error modelling using MCMC Yuto Nakamura
SCG48-P06 Slip distribution of the Boso slow slip events using ocean bottom pressure gauges Toshinori Sato
SCG48-P07 Characteristics of Deposits in the Southern Okinawa Trough: Preliminary Report of Cruise KH-23-11 Seiya Fujishima
SCG48-P08 Spatiotemporal pattern of fin whale signals along the Japan trench based on continuous seafloor seismic observation Masashi Mochizuki
SCG48-P09 The Challenger Deep bathymetry sounded during R/V Hakuho-maru KH-23-9 cruise Masakazu Fujii
SCG48-P10 The effects of coordinate systems on mantle convection and the cooling of oceanic lithosphere Hang Zhang
SCG48-P11 Magnetic anomalies in the Japan Sea: Seafloor spreading in the Japan Sea Masao Nakanishi
SCG48-P12 Tectonics of the initial stage of the Shikoku Basin spreading Takaaki Moriguchi
SCG48-P13 Active deformation structures of the Nankai forearc basin off Muroto-Ashizuri using seismic reflection data Konosuke TERUI
SCG48-P14 Seismic structure of subducted Kyushu Palau Ridge inferred from Po/So waves Azusa Shito
SCG48-P15 Preliminary report of KH-23-9 cruise: new datasets to understand the Southern Mariana region Yasuhiko Ohara
SCG48-P16 Estimates of the temperature and melting conditions of the Conrad Rise upper mantle Hiroshi Sato
SCG48-P17 Late Cretaceous triple junction trace and an extinct spreading ridge around Del Cano Rise, Conrad Rise, and Crozet Plateau in the southern Indian Ocean Taichi Sato
SCG48-P18 The Fluctuation of Mid-Ocean Ridge Processes along the Vulcan Transform in the Southern Ocean – MOWALL-Vulcan Kyoko Okino
SCG48-P19 Paleoseismology from turbidites of piston cores in the Kuril Trench slope, eastern Hokkaido, Japan KanHsi Hsiung
SCG48-P20 Large Holocene submarine landslide deposits at the Kuril trench: insights into the size and transportation processes Yu-Chun Chang
SCG48-P21 Spatial distribution of mineralization developed around the plate boundary fault in the Nankai Trough from X-ray CT data Natsuki Nomura
SCG48-P22 Structural and compositional analyses of pelagic sediments beneath the Nicobar fan, Indian Ocean: insights on compaction, diagenesis, and past intraplate deformation Mari Hamahashi
SCG48-P23 Experimental study of analytical methods for marine osmium isotopes in deep-sea sediments by chemical leaching Mori Shunsuke
SCG48-P24 An attempt to collect long sediment samples by modifying a multiple corer Katsura Kameo
SCG48-P25 Cross-line laser orientation method: Advancing seafloor sampling with Shinkai 6500 Kuniyuki Furukawa
SCG48-P26 Paleomagnetic analysis of deep-sea pillow basalt oriented by a cross-line laser installed on the Shinkai 6500. Jun Shibuya
SCG48-P27 Submarine geological structures in the southern part of the Okinawa Trough: Preliminary results of the KH-23-11 cruise Ayanori Misawa
SCG48-P28 Heat flow distribution in the southwestern Okinawa Trough Masataka Kinoshita
SCG48-P29 Geophysical observations in the Southern Okinawa Trough: Preliminary reports from the Hakuho-maru KH-23-11 cruise Michelle M. Nishimoto
SCG48-P30 Chemical and isotopic characteristics of interstitial water in surface sediments in the southern Okinawa Trough back-arc basin Tomohiro Toki
SCG48-P31 Recent deep-sea benthic foraminifera in southern part of Okinawa Trough, East China Sea Chika Onai
SCG48-P32 Seismic stratigraphy and subsurface structures east of Tokara Islands, the northern Ryukyu arc Saki Ishino
SCG48-P33 Widespread distribution and formation process of authigenic carbonates on the western slope of the northern Okinawa Trough Tomo Aoki
SCG48-P34 Distribution of the sedimentary facies in the northern East China Sea during the late Holocene Keita Saito
SCG48-P35 The submarine sedimentary environment around the Tokara Islands suggested by surface sediment distribution Yoshiaki Suzuki
SCG48-P36 Geochemical characterization of pelagic clay in the North Atlantic Ocean and its potential as a resource for rare-earth elements Naoto Takada
SCG48-P37 Environmental factors controlling REE-rich mud formation based on an ocean-sediment Nd mass balance box modeling Ryosuke Matsunami
SCG48-P38 ESR and radioisotope disequilibrium dating of barite occurring in Higashi-Aogashima sea-floor hydrothermal area Shin Toyoda
SCG48-P39 Occurrence of hydrothermal alteration zones beneath the seafloor off Muroto in Kochi Prefecture, Japan Hiroki Yumii