Distribution of iodine concentration and 129I in interstitial fluid in the Nankai Trough accretionary prism collected during IODP Expeditions 315 and 316

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doi: 10.2204/iodp.proc.314315316.220.2012
Author(s): Tomaru, Hitoshi; Fehn, Udo
Integrated Ocean Drilling Program, Expedition 314 Scientists, College Station, TX
Author Affiliation(s): Primary:
University of Tokyo, Department of Earth and Planetary Science, Tokyo, Japan
Other:
University of Wisconsin-Madison, United States
University of Tokyo, Japan
Universite de Cergy-Pontoise, France
University of Florida, United States
Ecole Nationale Supéieure de Géologie, France
Chungnam National University, South Korea
CEREGE-College de France, France
University of Texas-Austin, United States
CSIC, Institute of Earth Sciences, Spain
University of Southampton, United Kingdom
Kyoto University, Japan
University of California-Santa Cruz, United States
Rice University, United States
University of Leicester, United Kingdom
Leibniz Institute of Marine Sciences, Germany
University of Bremen, Germany
University of Connecticut, United States
University of Aberdeen, United Kingdom
Université de la Reunion, France
University of Missouri, United States
Kochi University, Japan
Shimane University, Japan
Osaka University, Japan
Hawaii Institute of Geophysics and Planetology, United States
Tampere University of Technology, Finland
Chiba University, Japan
Indiana University of Pennsylvania, United States
University of Michigan, United States
Hokkaido University, Japan
Kitami Institute of Technology, Japan
Woods Hole Oceanographic Institution, United States
Texas A&M University, United States
University of Franche-Comte, France
University of Wollongong, Australia
ETH Zürich, Switzerland
Brown University, United States
Oregon State University, United States
Tongji University, China
Stockholm University, Sweden
Max Planck Institute for Marine Microbiology, Germany
Scripps Institution of Oceanography, United States
China University of Geosciences, China
University of Rochester, United States
Volume Title: Proceedings of the Integrated Ocean Drilling Program; Nantroseize Stage 1; investigations of seismogenesis, Nankai Trough, Japan; Expeditions 314, 315, and 316 of the riser drilling platform from and to Shingu, Japan; Sites C0001-C0006, 21 September-15 November 2007; and Sites C0001 and C0002, 16 November-18 December 2007; and Sites C0004 and C0006-C0008, 19 December 2007-5 February 2008
Volume Author(s): Kinoshita, Masataka; Tobin, Harold; Ashi, J.; Kimura, G.; Lallemant, S.; Screaton, E. J.; Curewitz, D.; Masago, H.; Moe, K. T.; Thu, Moe Kyaw; Gaillot, Philippe; Bourlange, Sylvain; Chang, Chandong; Conin, Marianne; Gulick, Sean; Jurado Rodriguez, Maria José Jurado; Martin, Kylara M.; McNeill, Lisa; Miyakawa, Ayumu; Moore, J. Casey; Nakamura, Yasuyuki; Saito, Saneatsu; Sawyer, Dale S.; Tudge, Joanne; Yamada, Yasuhiro; Masago, Hideki; Behrmann, Jan H.; Boeckel, Babette; Byrne, Timothy; Calves, Gerome; Famin, Vincent; Guo Junhua; Hashimoto, Yoshitaka; Hayashi, Hiroki; Henry, Pierre; Hirono, Tetsuro; Hulme, Samuel M.; Kaksonen, Anna Henriikka; Kanagawa, Kyuichi; Kanamatsu, Toshiya; Kopf, Achim; Lewis, Jonathan C.; Likos, William John; Pares, Josep Maria; Saito, Hiroyuki; Schmidt-Schierhorn, Friederike; Tomaru, Hitoshi; Underwood, Michael; Zhu, Wen-Lu; Chester, Frederick; Fabbri, Olivier; Fergusson, Chris; Girault, France E.; Goldsby, David; Harris, Robert; Inagaki, Fumio; Jiang, Tao; Kitamura, Yujin; Knuth, Matt; Li Chunfeng; Liljedahl, Lillemor Claesson; Louis, Laurent; Milliken, Kitty; Nicholson, Uisdean; Riedinger, Natascha; Sakaguchi, Arito; Solomon, Evan; Strasser, Michael; Xin Su; Tsutsumi, Akito; Ujiie, Kochtaro; Yamaguchi, Asuka; Zhao, Xixi
Source: Proceedings of the Integrated Ocean Drilling Program; Nantroseize Stage 1; investigations of seismogenesis, Nankai Trough, Japan; Expeditions 314, 315, and 316 of the riser drilling platform from and to Shingu, Japan; Sites C0001-C0006, 21 September-15 November 2007; and Sites C0001 and C0002, 16 November-18 December 2007; and Sites C0004 and C0006-C0008, 19 December 2007-5 February 2008, Masataka Kinoshita, Harold Tobin, J. Ashi, G. Kimura, S. Lallemant, E. J. Screaton, D. Curewitz, H. Masago, K. T. Moe, Moe Kyaw Thu, Philippe Gaillot, Sylvain Bourlange, Chandong Chang, Marianne Conin, Sean Gulick, Maria José Jurado Jurado Rodriguez, Kylara M. Martin, Lisa McNeill, Ayumu Miyakawa, J. Casey Moore, Yasuyuki Nakamura, Saneatsu Saito, Dale S. Sawyer, Joanne Tudge, Yasuhiro Yamada, Hideki Masago, Jan H. Behrmann, Babette Boeckel, Timothy Byrne, Gerome Calves, Vincent Famin, Guo Junhua, Yoshitaka Hashimoto, Hiroki Hayashi, Pierre Henry, Tetsuro Hirono, Samuel M. Hulme, Anna Henriikka Kaksonen, Kyuichi Kanagawa, Toshiya Kanamatsu, Achim Kopf, Jonathan C. Lewis, William John Likos, Josep Maria Pares, Hiroyuki Saito, Friederike Schmidt-Schierhorn, Hitoshi Tomaru, Michael Underwood, Wen-Lu Zhu, Frederick Chester, Olivier Fabbri, Chris Fergusson, France E. Girault, David Goldsby, Robert Harris, Fumio Inagaki, Tao Jiang, Yujin Kitamura, Matt Knuth, Li Chunfeng, Lillemor Claesson Liljedahl, Laurent Louis, Kitty Milliken, Uisdean Nicholson, Natascha Riedinger, Arito Sakaguchi, Evan Solomon, Michael Strasser, Xin Su, Akito Tsutsumi, Kochtaro Ujiie, Asuka Yamaguchi and Xixi Zhao; Integrated Ocean Drilling Program, Expedition 314 Scientists, College Station, TX; Integrated Ocean Drilling Program, Expedition 315 Scientists; Integrated Ocean Drilling Program, Expedition 316 Scientists. Proceedings of the Integrated Ocean Drilling Program, Vol.314/315/316, 9p. Publisher: IODP Management International, Washington, DC, United States. ISSN: 1930-1014
Note: In English. 23 refs.; illus., incl. 2 tables
Summary: Iodine concentration and 129I/I ratios were determined in interstitial fluid collected from the Nankai Trough accretionary prism during Integrated Ocean Drilling Program (IODP) Expeditions 315 and 316. Iodine concentrations increase rapidly in the uppermost 100 m below the seafloor, before concentrations reach stable values between 200 and 400 µM, reflecting the advection of iodine released during the degradation of organic matter in deep sediments. The 129I/I ratios in the interstitial fluid start just below preanthropogenic seawater values and decrease rapidly with depth to ratios ∼400×1015. These ratios result in ages for the potential iodine source formation between 30 and 40 Ma, which are clearly older than the host sediments and demonstrate that advection of fluids is responsible for the observed distribution of iodine at these sites. Significant increases in 129I/I ratios uphole are found just above the lithologic boundary between the overlying forearc basin and older accreted sediments. This observation suggests that only limited migration of ascending deep fluids occurs beyond the lithologic boundary, where sediment porosity drops abruptly from 60% to 50%, and that fluids move preferentially along the lithologic boundary.
Year of Publication: 2012
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 02 Geochemistry; 07 Marine Geology and Oceanography; Accretionary wedges; Asia; Boreholes; Concentration; Continental margin; Cores; Far East; Geochemistry; Halogens; Honshu; Hydrochemistry; I-129; IODP Site C0001; IODP Site C0002; Integrated Ocean Drilling Program; Iodine; Isotopes; Japan; Kii Peninsula; Marine sediments; NanTroSEIZE; Nankai Trough; North Pacific; Northwest Pacific; Pacific Ocean; Pore water; Porosity; Radioactive isotopes; Sediments; Spatial variations; Tracers; West Pacific
Coordinates: N331400 N331400 E1364300 E1364300
N331800 N331800 E1363800 E1363800
Record ID: 2012016472
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