[H-CG23] 混濁流:発生源から堆積物・地形形成まで

[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)

キーワード：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.