Program

International Symposium on Deep Sea Research in Subduction Zones,

Spreading Centers and Backarc Basins

Program of

International Symposium on Deep Sea Research in Subduction Zones, Spreading

Centers and Backarc Basins

Gakushi-kaikan Hall, Tokyo, Japan (10-11 December 1996)

December 10 (Tue)

Opening09:30-09:35 Openinng Remarks

Hiroshi Hotta (JAMSTEC)09:35-09:45 Welcome Address

Mitsugu Ishizuka (JAMSTEC)

09:45-09:50 Purpose and LogisticsKantaro Fujioka and Takeshi Matsumoto (JAMSTEC)

Deep-Sea Resarch at JAMSTEC09:50-10:10 JAMSTEC Deep-Sea Research, Past and Future

Hajimu Kinoshita (JAMSTEC)10:10-10:20 Shinkai-2000 System

Jun Hashimoto (JAMSTEC)10:20-10:30 Shinkai-6500 System

Kantaro Fujioka (JAMSTEC)Coffee Break

Session-1: Understanding of Collision and Subduction Tectonics

10:50-11:10 Tectonics of Japan TYebch-Role of Normal and Reverse Faults for TectonicErosion and Calyptogena Colonies at Subduction Zone

Yujiro Ogawa (University of Tsukuba), Kantaro Fujioka, Kazuo Kobayashi,

Katsunori Fujikura (JAMSTEC) and Yo Iwabuchi (HydrographicDepartment)

11:10-11:30 The Izu-Bonin-Mariana (IBM) Arc System: Outstanding Natural Laboratory forthe Studies of Convergent Plate Margin

Makoto Arima (Yokohama National University) and Robert J.Stern

(University of Texas at Dallas)11:30~11:50 The Southern Mariana Arc and Mariana Trough: Diving Surveys and Underway

GeophysicsHiromi Fujimoto (University of Tokyo), P. Fryer (University of Hawaii),M. Mottl (University of Hawaii), T. Ishii (University of Tokyo), K. Tamaki(University ofTokyo), M. Sekine (University of Tokyo), C. Honsho(University ofTokyo)

11:50-12:10 Serpentine Dominated Tectonics around the Southern Philippine Sea Boundary-Tectonics of Yap, Palau, Mariana Trenches-

Kantaro Fujioka (JAMSTEC)Lunch

13:00-13:20 ASubmersible-Based Comparison of Cold-Seep Regions in Sagami and

Monterey BaysGary Greene (Moss Landing Marine Laboratories), Jim Barry (MonteryBay Aquarium Research Institute), Jun Hashimoto (JAMSTEC), YoshihiroFijiwara (JAMSTEC), Randy Kochcvar (Monterey Bay Aquarium), andBruce H. Robisojn (Montery Bay Aquarium Research Institute)

13:20-13:40 Understanding Subduction Tectonics: Hie NankaiTrough CaseJean-Paul Cadet (Universite Pierre et Marie Curie)

13:40~14:00 Neotectonic Development of the Okinawa TroughMasaakiKimura (Ryukyu. University)

14:00-14:20 TAICRUST and Deep Seismic Imaging of Western End of Ryukyu Arc-

Trench System . ≫ ･Char-Shine Liu (National Taiwan University)

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14:20-14:40 Influence of Subduction and Collision of Lithospheres Plates on theTerritory of Vietnam

Nguyen Trong Yem (Institute of Geology, National Center for NaturalScience and Technology of Vietnam)and Technology of Vietnam)

Coffee Break―Session-2: Architectures and Fluxes in Spreading Ridges Structure

15:00-15:30 The TAG Hydrothermal Site: Some Recent Investigations and

Implications

Richrad P. von Herzen (Woods Hole Oceanographic Institution)15:30-15:50 High Resolution Magnetic Studies of the Magnetization of Oceanic Crust

Maurice Tivcy (Woods Hole Occanographic Institution)15:50-16:10 Submersible Dive Survey to the Superfast-Spreading East Pacific Rise

14° S and 19° STetsurou Urabe (Geological Survey of Japan) and Ridge FluxGroup

SessIom-3: Evolution of Backarc Basins16:10-16:30 Geochemical Study of the Active Hydrothermal Systems in the Okinawa

Trough Backarc Basin

Hitoshi Chiba (Kyushu University)

16:30-16:50 Chemical Characteristics of Hydrotheimal Fluids from the Mariana Trough

Toshitaka Gamo, Urumu Tsunogai, and Jun-ichiro Ishibashi (University ofTokyo)

16:50-17:10 Magnetic Anormalies near the Axial Part of the North Fiji BasinMasato Joshima (Geological Survey of Japan) and Manabu Tanahashi(Japan National Oil Corporation)

HAPPY HOUR & POSTER SESSION(17:30~18:30)1. Earth's Last Frontier of Pyroclastic Volcanism

Richerd Fiske (Smithonian Institute)

2. Collocated Imagery and Bathymetry Mapping by [TAMU]2 Sidescan Sonar System :A New View of the Seafloor of the Southern EPR

Kiyoyuki Kisimoto (Geological Survey of Japan), ThomasW. C. Hilde and

Chih-wen Kue (Texas A&M University)3. The Relation between Earthquakes, Faulting Submarine Hydrothermal Mineralization

Geoffrey P. Glasby (Geological Survey of Japan)4. Seismic Velocity Anisotropy of Sheeted Dike at the Oman Ophiolite Complex

Yuka Kaiho (JAMSTEC), Kiyoyuki Kisimoto (JAMSTEC), Akiko Tanaka(Geological Survey of Japan) and E. K. Warsi (Sultanate QuaboosUniversity)

5. Trace Elements at the Manus Basin, Papua New Guinea

Kiminori Shitashima (Cenrtrai Research Institute of Electric Power Industry)6. The Flux of Total Carbonate at the Southen East Pacific Rise

Kiminori Shitashima (Central Research Institute of Electric Power Indutry)

7. Significance of Mantle/Melt Interaction Beneath the Mid-Ocean Ridge.

Kyoko Matsukage and Syouji Arai (Kanazawa University)8. Subduction Tectonics of the Barbados Accretionsry Prism - Role of the Decollement-

A reviewYujiro Ogawa (University of Tsukuba)

9. K-Ar and 40Ar/3,ArAges of the Volcanic Rocks from the Back-arc Sea Mounts of the Izu-Ogasawara Arc

Osamu Ishizuka, Makoto Yuasa, Kozo Uto (Geological Survey of Japan)

and A. G. Hochstaedter (University of California)10. Record of Hydrothermal Activity in the Across-Arc Seamount Chains of the Izu-Ogasawara

Arc

Osamu Ishizuka, Makoto Yuasa, Kozo Uto (Geological Survey of Japan)

and A.G. Hochstaedter (University of California)

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11. Tectonic Evolution of Eastern Margin of Japan Sea

Shin'ichi Kuramoto (Geological Survey of Japan)12. "Paleogene" Forearc Seamount close to the Volcanic front of Izu-Ogasawara Arc:

flk 4* I ■ ^ A I <1 I I ≪ VW ■ VPreliminary Results of a Submersible Study by SHINKAI 6500Makoto Yuasa, Osamu Ishizuka, Akira Nishimura and Masato Nohara

J A A A ^ A A(Geological Survey of Japan)13. Hie Upwelling Fluid on the Biological Community at the Subduction Zone SagamiTrough

Norio Yoshida (National Research Institute for Earth Science and Disaster

Orevention) and Hiroaki Tsukahara (Shinshu University)14. Large Slope Failure off Miyako and Yaeyama Islands, Southwest Ryukyu in relation to the

Yaeyama Earthquake TsunamiTakeshi Matsumoto (JAMSTEQ

15. Removing the Veil from the Deep SeaDeep Sea Research Department, JAMSTEC

Cash Bar (18:30-20:40)

December 11 (Wed.)

Session*3: Evolution of Backarc Basins09:30-09:50 The Geophysical Characteristics and Extension Model of Southern South China

SeaYan Pin (South China Sea Institute)

09:50-10:10 The Architectures and Fluxes on Spreading Ridges Structure and the ODPProposal in the South China Sea

Bochu Yao (Guangzhou Marine Geological Survey)

10:10-10:30 Evolution of the Shikoku Basin and the Parece Vela BasinShigeru Kasuga, Kyoko Okino and Yasuhiko Ohara (Maritime SafetyAgency of Japan)

Coffee Break Session-4: Surveys on Resources and Environments

10:50-11:10 Chemosynthetic Communities in the Western PacificJun Hashimoto (JAMSTEQ

11:10-11:30 Hydrothermal Vents: AGlobal EcosystemM ft ft ■ ft VVerena Tunicliffe (Uni

11:30-11:50 Molecular Systematica

■ ii *Robert C. Vrij<11:50-12:10 Comparative Studie

Vent Organisms

:ology of Chemosynthetic

Communities in Monterey and Sagami BaysJames P. Barry (Monterey Bay Aquarium Research Insitute),Jun Hashimoto

(JAMSTEC), Bruce H. Robison (Monterey Bay Aquuarium ResearchInstitute), Randy E. Kochevar (Monterey Bay Aquarium), Daniel L. Orange(Monterey Bay Aquarium Research Insitute), and Gary Greene (Moss

Landing Marine Laboratories)12:10-12:30 Sediment Fatty Acid Compositions Associated with Presumed Cold- Seepage in

Subduction Zones

Takeshi Naganuma (Hiroshima University)

Lunch―Session-5: Development of New Technologies

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14:00-14:20 Imaging the Hydraulic Structure of the Earth by Super Cross-Well Tomography

Tokuo Yamamoto, Tom Nyc and Murat Kuru (RSMAS, University of

Miami*)14:20-14:40 SEABASS and Seismoacoustic Noise below the Seafloor

Ralph Stephen (Woods Hole Oceanographic Institution) and C. R. Bradley(University of California)

icliffe (University of Victoria)

matics of Deep-Sea Hydrotheimal Vent C'rijenhoek (Rutgers University)dies of Fluid Dynamics and the Ecology

Monterey and Sagami Bays

14:40-15:00 CORK Experiments: Long-Term Observatories in Seafioor Boreholes toMonitor In-situ Hydrologic Conditions and Process

Keir Becker (University of Miami)15:00-15:20 Development of a Seafioor Acoustic Ranging System(SeaFAR)

Yoshihara Nagaya, Tetsuitirou Yabuki, Akira Asada (MaritimeSafety Agency), Fusakiti Ono (Sena Inc.), and Katsuyuki Tajiri (NichiyuGiken Kogyo Co., Ltd)

Coffee Break Session-6: Strategy for Realization of Future Experiments

15:40-16:10 In-situ Monitoring of anActive Submarine Volcano, Loihi Seamount, HawaiiAlexander Malahoff (University of Hawaii)

16:10-16:30 Acoustic Imaging of Black Smoker Plumes and Diffuse Flow: ANew Method toStudy and Monitor Hydrotheimal Flow Regimes

Peter A. Rona (Rutgers University)16:30-16:50 Down Hole

Earthquake <Hidekazu

16:50-17:10 Long TermSensors

Water Circulation Associated with

Tokyo)Observation by Using Multidisciplinaiy

Ryoichi Iwase, Hiroyasu Momma, Kyohiko Mitsuzawa, NoriyukiFujiwara, Katsuyoshi Kawaguchi and Shin'ichirou Suzuki (JAMSTEQ

Closure17:10-17:15 Closing Remarks

Kazuo Kobayashi (JAMSTEQ

― 240 ―

: Experiment to Monitor Watei

at Eastern Nankai Trough

izu Tokuyama (University of'and Real Time Deep Seafloor