IODP Expedition 338: NanTroSEIZE stage 3: NanTroSEIZE plate boundary deep riser 2

G. F. Moore, K. Kanagawa, M. Strasser, B. Dugan, L. Maeda, S. Toczko, Lionel Esteban, Olivier Fabbri, Jacob Geersen, Sebastian Hammerschmidt, Hiroki Hayashi, Katrien Heirman, Andre Huepers, Maria José Jurado Rodriguez, Koji Kameo, Toshi Kanamatsu, Yukari Kido, Hiroko Kitajima, Harue Masuda, Kitty MillikenRavi Mishra, Kyaw Thu Moe, Isao Motoyama, Katelyn Olcott, Kiyokazu Oohashi, Kevin T. Pickering, Sebastian Ramirez, Harunur Rashid, Yoshinori Sanada, Derek Sawyer, Anja Schleicher, Yehua Shan, Robert Skarbek, Insun Song, Toru Takeshita, Tomohiro Toki, Joanne Tudge, Susanna Webb, Dean Wilson, Hung Yu Wu, Asuka Yamaguchi

研究成果: Article同行評審

24 引文 斯高帕斯(Scopus)

摘要

The Nankai Trough Seismogenic Zone Experiment (NanTroSEIZE) is designed to investigate fault mechanics and seismogenesis along a subduction megathrust, with objectives that include characterizing fault slip, strain accumulation, fault and wall rock composition, fault architecture, and state variables throughout an active plate boundary system. Integrated Ocean Drilling Program (IODP) Expedition 338 was planned to extend and case riser Hole C0002F from 856 to 3600 meters below the seafloor (m b.s.f.). Riser operations extended the hole to 2005.5mb.s.f., collecting logging-while-drilling (LWD) and measurement-while-drilling, mud gas, and cuttings data. Results reveal two lithologic units within the inner wedge of the accretionary prism that are separated by a prominent fault zone at ̃ 1640mb.s.f. Due to damage to the riser during unfavorable winds and strong currents, riser operations were suspended, and Hole C0002F left for re-entry during future riser drilling operations. Contingency riserless operations included coring at the forearc basin site (C0002) and at two slope basin sites (C0021 and C0022), and LWD at one input site (C0012) and at three slope basin sites (C0018, C0021 and C0022). Cores and logs from these sites comprehensively characterize the alteration stage of the oceanic basement input to the subduction zone, the early stage of Kumano Basin evolution, gas hydrates in the forearc basin, and recent activity of the shallow megasplay fault zone system and associated submarine landslides.

原文English
頁(從 - 到)1-12
頁數12
期刊Scientific Drilling
發行號17
DOIs
出版狀態Published - 2014 一月 1

All Science Journal Classification (ASJC) codes

  • 能源工程與電力技術
  • 機械工業

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