Session outline
| Solid Earth Sciences (S) | ||
|---|---|---|
| Session Sub-category | Complex & General(CG) | |
| Session ID | S-CG70 | |
| Title | Ocean Floor Geoscience | |
| Short Title | Ocean Floor Geoscience | |
| Main Convener | Name | Masakazu Fujii |
| Affiliation | National Institute of Polar Research and SOKENDAI | |
| Co-Convener 1 | Name | Yojiro Yamamoto |
| Affiliation | Japan Agency for Marine-Earth Science and Technology | |
| Co-Convener 2 | Name | Satoko Owari |
| Affiliation | Tokyo University of Marine Science and Technology | |
| Co-Convener 3 | Name | Takeshi Iinuma |
| Affiliation | National Research and Development Agency Japan Agency for Marine-Earth Science and Technology | |
| Co-Convener 4 | Name | Norikatsu Akizawa |
| Affiliation | Earth and Planetary System Science, Hiroshima University | |
| Session Language |
J |
|
| Scope |
Most of Earth's volcanism and much of its tectonic activity occur on and beneath the seafloor. Various seafloor phenomena are closely linked to plate tectonics, Earth's internal structure and dynamics, and are also connected to the Earth's environments through interactions with the hydrosphere and atmosphere. Rocks and sediments from the seafloor preserve records of Earth's evolution as well as its heat and material fluxes. The Ocean Floor Geoscience session covers a broad range of research topics related to the seafloor, including mid-ocean ridge processes, subduction dynamics, arc and intraplate magmatism, crustal movement and structure, and more. All research fields and approaches are welcome. The session aims to encourage discussion among scientists from diverse disciplines and to integrate our understanding of the ocean floor. |
|
| Presentation Format | Oral and Poster presentation | |
| Time | Presentation No | Title | Presenter |
|---|---|---|---|
| Oral Presentation May 28 PM1 | |||
| 13:45 - 14:00 | SCG70-01 | Offshore aftershock observation of the 2024 Noto earthquake using Ocean Bottom Seismometers over one year | Tomoaki Yamada |
| 14:00 - 14:15 | SCG70-02 | Seismic characteristics in and around the source region of the 2025 MJ 7.5 earthquake offshore east of Aomori Prefecture, derived from seismic reflection data | Tetsuo No |
| 14:15 - 14:30 | SCG70-03 | Crustal and seafloor deformation associated with ridge subduction: Lateral variations off Tokai in the Nankai Trough | Kazuya Shiraishi |
| 14:30 - 14:45 | SCG70-04 | Tectonic Deformation and Basin Development offshore Kii Strait: Insights from 3D Seismic Imaging | Yuki Kawano |
| 14:45 - 15:00 | SCG70-05 | Fault activity inferred from subsurface structure and core sample in subduction boundary of Sagami bay | Juichiro Ashi |
| Oral Presentation May 28 PM2 | |||
| 15:30 - 15:45 | SCG70-06 | Relationship between unconsolidated sand layers identified at IODP EXP346 U1428 and 1429 (west of Kyushu, Danjo Basin) and wavy bedforms on the western slope of the northern Okinawa Trough | Satoru Haraguchi |
| 15:45 - 16:00 | SCG70-07 | Integrated sedimentological and geochemical analysis of event deposits in the outer rise of the Japan Trench | Yang ZHAO |
| 16:00 - 16:15 | SCG70-08 | Spatiotemporal variations of elemental mass accumulation rates: Implications for REE-rich mud formation in the Cenozoic ocean | Kazutaka Yasukawa |
| 16:15 - 16:30 | SCG70-09 | In situ geochemical analysis of lithologic boundary in REE-rich mud from the Minamitorishima EEZ using LA-ICP-MS | Kodama Rei |
| 16:30 - 16:45 | SCG70-10 | Thermoelectric Conversion in Seafloor Hydrothermal Vents: Insights from Three-Dimensional Analysis of Sulfide Chimneys | Kentaro Toda |
| Oral Presentation May 29 AM2 | |||
| 10:45 - 11:00 | SCG70-11 | Tectonics of a long oceanic transform and the temporal variability in melt supply, the Marie Celeste Transform Fault, Central Indian Ridge | Kyoko Okino |
| 11:00 - 11:15 | SCG70-12 | Project MOWALL: seafloor topography and geochemistry of basalts along the Marie Celeste Transform in the Central Indian Ridge | Shiki Machida |
| 11:15 - 11:30 | SCG70-13 | Seismic velocity structure at 37ºE in the southwest Indian Ridge: Part 2 | Toshinori Sato |
| 11:30 - 11:45 | SCG70-14 | Tectonic setting of the abyssal basins around the Ontong Java Plateau | Masao Nakanishi |
| 11:45 - 12:00 | SCG70-15 | Linking Melt Heterogeneity, Crust–Mantle Structure, and Hydrogen Generation along the Ultraslow Gakkel Ridge | Masakazu Fujii |
| Oral Presentation May 29 PM1 | |||
| 13:45 - 14:00 | SCG70-16 | Petrofabric and geochemical characteristics of Izu-Bonin forearc gabbroic rocks from KR08-07 and KH07-02 cruises | Yumiko Harigane |
| 14:00 - 14:15 | SCG70-17 | Olivine crystal-fabrics and deformation microstructures of peridotites derived from Mariana serpentinite seamounts: Results from KM23-05 Drilling Expedition | Kazuki Matsuyama |
| 14:15 - 14:30 | SCG70-18 | Petrological and geochemical characteristics of the oceanic lithosphere in the South Pacific as indicated by mantle xenoliths from Tubuai and Samoa Islands | Tetsu Kogiso |
| 14:30 - 14:45 | SCG70-19 | Volcanic Clasts Far from Home: Iceberg-rafted mantle xenolith–bearing volcanic clasts along the Antarctic margin | Hiroshi Sato |
| 14:45 - 15:00 | SCG70-20 | “Weak” paleomagnetic field intensity in the Cretaceous Normal Superchron measured from the drilling core basalts of the Central Kerguelen plateau Elan Bank and implications of thermal condition at the core-mantle boundary | Yutaka Yoshimura |
| 15:00 - 15:15 | SCG70-21 | Seafloor Survey of Off-Miyagi Japan Trench with Urashima 8000 | Toshiya Fujiwara |
| Oral Presentation May 29 PM2 | |||
| 15:30 - 15:45 | SCG70-22 | Observation of Shallow Slow Slip Events in the Nankai Trough by seafloor and deep seafloor borehole fiber optic strainmeter arrays. | Eiichiro Araki |
| 15:45 - 16:00 | SCG70-23 | Acoustic Distance Meter survey revealed kinematic coupling at the shallowest plate interface in the southwestern Kuril Trench | Shoutarou Matsumoto |
| 16:00 - 16:15 | SCG70-24 | Understanding short-period changes in sound velocity field of sea water observed in GNSS-A surveys | Reiki Ichinohe |
| 16:15 - 16:30 | SCG70-25 | Effects of underwater sound speed variability on GNSS-A seafloor geodesy: A ROMS-based numerical study | Tadashi Ishikawa |
| 16:30 - 16:45 | SCG70-26 | Oceanographic interpretation of the error correlation term in the GNSS-A observation model of GARPOS | Shun-ichi Watanabe |
| Presentation No | Title | Presenter |
|---|---|---|
| Poster Presentation May 29 PM3 | ||
| SCG70-P01 | Formation age of the channel-like structure around the western slope of the northern Okinawa Trough | Keita Saito |
| SCG70-P02 | Lateral variation of multi-elements isotopes in sea sediments from East China Sea | Yuka Tatera |
| SCG70-P03 | Correction of External Magnetic Fields in Marine Magnetic Anomaly Mapping: A Case Study from the Mid-Okinawa Trough | Kazuya Kitada |
| SCG70-P04 | Revisiting Integrated Marine and Land Gravity Data Related to the 2024 Noto Peninsula Earthquake | Hiroaki Koge |
| SCG70-P05 | Estimation of the 3D density structure of the Kikai caldera using gravity anomalies | Ryosuke Suzuki |
| SCG70-P06 | Characteristics of Diatom Assemblages in Marine Sediments off the Fuji River, Suruga Bay | Yusei Miyata |
| SCG70-P07 | Occurrence Trends and Characteristics of Diatom Remains in Sediments Off the Abe River to Kunō Coast in Suruga Bay | Narumi Ichihara |
| SCG70-P08 | Petrographic characteristics of the basement rocks collected from the eastern Izu-side slope of Suruga Bay | Oh Furuhashi |
| SCG70-P09 | Seabed Topography and Geological Features in the Shallow Waters of the Inner Suruga Bay | Nina Arai |
| SCG70-P10 | Characteristics and Preservation of Event Sediments in the Toni Bay, Iwate Prefecture | Yui Watanabe |
| SCG70-P11 | Characteristics of Tsunami Deposits in Hirota Bay, Iwate Prefecture: Changes Over 10 Years Since the 2011 Tohoku Offshore Earthquake Tsunami | Yuzuki Tominaga |
| SCG70-P12 | Improvement of GNSS Positioning Accuracy in GNSS-A Observations Using RTKLIB | Keisuke Tammori |
| SCG70-P13 | Validity of sound speed structure in the Kuroshio region estimated by the analysis tool for GNSS-Acoustic positioning, GARPOS | Yuma Shimano |
| SCG70-P14 | Detection of low frequency whale calls off southern coast of Japan with cabled ocean bottom seismometers | Ryoichi Iwase |
| SCG70-P15 | Seasonal detection pattern of fin whale vocalizations along the Japan trench based on the S-net seafloor seismological observation | Masashi Mochizuki |
| SCG70-P16 | Geochemistry of biogenic apatite in REE-rich mud around Minamitorishima Island based on in situ analysis by LA-ICP-MS | Kazutaka Yasukawa |
| SCG70-P17 | Relationship Between Shallow Subsurface Structure and Rare-Earth Mud Concentration Around Minamitorishima Island | Kazuo Nakahigashi |
| SCG70-P18 | Beryllium isotope dating of deep-sea sediments at ODP Site 1179 in the western North Pacific Ocean | Fumihito Koseto |
| SCG70-P19 | Results and Implications of Be Isotope Dating of Seafloor Sediments Recording Glacial–Interglacial Cycles from Shatsky Rise | Yuki Yoshizumi |
| SCG70-P20 | Tectonics and seep activity in the Southern Mariana forearc area as interpreted from carbonates | Kosuke Adachi |
| SCG70-P21 | Geochemical characteristics of REE-rich mud in the southern Wharton Basin, eastern Indian Ocean | Yuma Kodama |
| SCG70-P22 | Detailed Morphology of Rodrigues Segment, Central Indian Ridge | Chetan Rahul Puntambekar |
| SCG70-P23 | The effect of alteration observed on the geochemistry of basalts along the Marie Celeste Transform in the Central Indian Ridge | Shiki Machida |
| SCG70-P24 | Petrology of abyssal epidosite from the Marie Celeste Fracture Zone at the Indian Ocean | Yuka Watari |
| SCG70-P25 | Ultramafic Rocks of Kosrae Island, Federated States of Micronesia | Momoka Nagashima |
| SCG70-P26 | Mapping of Submarine Calderas Resulting from Oceanic Intraplate Volcanism | Tomoki Joichi |