Japan Geoscience Union Meeting 2018

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[EE] Oral

H (Human Geosciences) » H-CG Complex & General

[H-CG23] Turbidity current: from triggers for the generation to the depositional and morphological processes

Mon. May 21, 2018 1:45 PM - 3:15 PM 102 (1F International Conference Hall, Makuhari Messe)

convener:Miwa Yokokawa(Osaka Institute of Technology), Norihiro Izumi(Faculty of Engineering, Hokkaido University), Takeshi Nakajima(産業技術総合研究所地圏資源環境研究部門, 共同), Hajime Naruse(Department of Geology and Mineralogy, Graduate School of Science, Kyoto University), Chairperson:Yokokawa Miwa, Izumi Norihiro(Hokkaido University)

3:00 PM - 3:15 PM

[HCG23-06] An experimental approach for submarine canyon-fan system

★Invited Papers

*Steven Y. J. Lai1, David Amblas2, Thomas P Gerber3 (1.National Cheng Kung University, 2.Scott Polar Research Institute - University of Cambridge, UK, 3.Statoil - Research and Technology, Austin, Texas, USA)

Keywords:submarine canyon-fan system, sandbox experiment, sediment gravity flow

We present results from a novel sandbox experiment designed to study how sediment gravity flows shape and form a submarine canyon-fan system. In the experiment, unconfined saline gravity flows were released onto an inclined sand bed with an internal, continuously increasing relief that was used to represent a dynamic continental slope. In areas influenced by the gravity flows, we observed deeply incised submarine canyons and dynamically swinging submarine fans. Successive high-resolution digital elevation models allow us to quantify canyon piracy, fan coalescing and sediment routes. The preliminary results show encouraging canyon-fan morphology that behavior similarly in several important respects to that observed in the field.