Leg 186 synthesis; drilling the forearc of the Northeast Japan Arc; causes and effects of subduction plate coupling over 20 m.y.

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doi: 10.2973/odp.proc.sr.186.119.2003
Author(s): Sacks, I. Selwyn; Suyehiro, Kiyoshi
Ocean Drilling Program, Leg 186, Shipboard Scientific Party, College Station, TX
Author Affiliation(s): Primary:
Carnegie Institution of Washington, Department of Terrestrial Magnetism, Washington, DC, United States
Other:
Carnegie Institution of Washington, United States
Ocean Drilling Program, United States
University of Tokyo, Japan
Stockholm University, Sweden
Hokkaido University, Japan
Pukyong National University, South Korea
Florida State University, United States
Indiana State University, United States
University of Edinburgh, United Kingdom
Shizuoka University, Japan
Universität Freiburg, Federal Republic of Germany
Lamont-Doherty Earth Observatory, United States
Japan Marine Science and Technology Center, Japan
Volume Title: Proceedings of the Ocean Drilling Program, scientific results, Western Pacific geophysical observatories; covering Leg 186 of the cruises of drilling vessel JOIDES Resolution; Yokohama, Japan, to Yokohama, Japan; sites 1150 and 1151, 14 June-14 August 1999
Volume Author(s): Suyehiro, Kiyoshi; Sacks, I. Selwyn; Acton, Gary D.; Acierno, Michael J.; Araki, Eiichiro; Ask, Maria V. S.; Ikeda, Akihiro; Kanamatsu, Toshiya; Kim, Gil Young; Li, Jingfen; Linde, Alan T.; McWhorter, Paul N.; Mora, Germán; Najman, Yanina M. R.; Niitsuma, Nobuaki; Pandit, Benoy K.; Roller, Sybille; Saito, Saneatsu; Sakamoto, Tatsuhiko; Shinohara, Masanao; Sun, Yue-Feng
Source: Proceedings of the Ocean Drilling Program, scientific results, Western Pacific geophysical observatories; covering Leg 186 of the cruises of drilling vessel JOIDES Resolution; Yokohama, Japan, to Yokohama, Japan; sites 1150 and 1151, 14 June-14 August 1999, Kiyoshi Suyehiro, I. Selwyn Sacks, Gary D. Acton, Michael J. Acierno, Eiichiro Araki, Maria V. S. Ask, Akihiro Ikeda, Toshiya Kanamatsu, Gil Young Kim, Jingfen Li, Alan T. Linde, Paul N. McWhorter, Germán Mora, Yanina M. R. Najman, Nobuaki Niitsuma, Benoy K. Pandit, Sybille Roller, Saneatsu Saito, Tatsuhiko Sakamoto, Masanao Shinohara and Yue-Feng Sun; Ocean Drilling Program, Leg 186, Shipboard Scientific Party, College Station, TX. Proceedings of the Ocean Drilling Program, Scientific Results (CD ROM), Vol.186, 27p. Publisher: Texas A&M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 1096-2514
Note: In English. Also available on CD-ROM in PDF format and on the Web in PDF or HTML. 54 refs.CD-ROM format, ISSN 1096-2514; WWW format, ISSN 1096-7451; illus., incl. sect., sketch maps
Summary: High-recovery core sample and downhole logging data from Sites 1150 (39°11'N, 143°20'E) and 1151 (38°45'N, 143°20'E), drilled during Ocean Drilling Program Leg 186, generally confirmed the Neogene tectonic erosion history as discovered and described by Deep Sea Drilling Project Legs 56, 57, and 87, drilled between 39°44'N and 40°38'N in the northeast Japan Trench forearc. We propose that the sedimentary characteristics of the drilled cores can be explained as consequences of the change in plate coupling between the subducting Pacific plate and the Eurasian plate, dependent on the plate dip angle and water flux resulting from plate subduction. Our model explains the interrelationship among the observed and inferred changes in the plate dip angle, location of the volcanic front, sedimentation rate, volcanic activity, and horizontal stress field caused by the change in plate coupling, which dictates the amount of tectonic force transmitted across the plate boundary. Previously studied subsidence history of the forearc, ascribed to the subduction erosion process, is also incorporated.
Year of Publication: 2003
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; 18 Geophysics, Solid-Earth; Basins; Cenozoic; Cores; Coupling; Erosion; Fore-arc basins; Island arcs; Japan Trench; Leg 186; Lithostratigraphy; Models; Neogene; North Pacific; Northwest Pacific; ODP Site 1150; ODP Site 1151; Ocean Drilling Program; Ocean floors; Pacific Ocean; Pacific Plate; Paleo-oceanography; Plate tectonics; Seismotectonics; Subduction; Tectonics; Tertiary; Volcanism; West Pacific
Coordinates: N384500 N384500 E1432000 E1432000
N391100 N391100 E1432000 E1432000
Record ID: 2004011511
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