Huge deep-sea landslide in the Southern Mariana Trench: a preliminary report of 6K-1429 dive

Teruaki Ishii; Yasuhiko Ohara; Shoma Oya; Fernando Martinez

Presentation information

Oral

Symbol S (Solid Earth Sciences) » S-CG Complex & General

[S-CG59] Ocean Floor Geoscience

Thu. May 26, 2016 9:15 AM - 10:30 AM 301B (3F)

Convener:*Kyoko Okino(Ocean Research Institute, University of Tokyo), Keiichi Tadokoro(Research Center for Seismology, Volcanology and Earthquake and Volcano Research Center, Nagoya University), Osamu Ishizuka(Geological Survey of Japan, AIST), Tomohiro Toki(Faculty of Science, University of the Ryukyus), Narumi Takahashi(Research and Development Center for Earthquake and Tsunami, Japan Agency for Marine-Earth Science and Technology), Chair:Juichiro Ashi(Atmosphere and Ocean Research Institute, The University of Tokyo), Takahiro Hiramatsu(Asia Air Survey Co., Ltd.)

9:30 AM - 9:45 AM

[SCG59-14] Huge deep-sea landslide in the Southern Mariana Trench: a preliminary report of 6K-1429 dive

*Teruaki Ishii¹, Yasuhiko Ohara^2,3, Shoma Oya⁴, Fernando Martinez⁵ (1.Fukada Geological Institute, 2.Hydrographic and Oceanographic Department of Japan, 3.Japan Agencey for Marine-Earth Science and Techonology, 4.Shizuoka University, 5.University of Hawaii)

Keywords:Southern Mariana Trench, deep-sea landslide, serpentinized mantle peridotite

We have identified a huge deep-sea landslide structure in the Southern Mariana Trench. DSV Shinkai 6500 dive 1429 investigated this structure during YK15-11 cruise of R/V Yokosuka. In this contribution, we will have a preliminary report of the dive and discuss the origin of this structure.