Proc. IODP, 314/315/316, Data report: distribution of iodine concentration and 129 I in interstitial fluid in the Nankai Trough accretionary prism collected during IODP Expeditions 315 and 316

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Chapter contents Abstract Introduction Geological settings Iodine geochronology in marine environments Analytical methods Results Acknowledgments References Figures F1. Iodine concentrations. F2. ¹²⁹I/I ratios and sediment porosity. Tables T1. Iodine concentrations. T2. ¹²⁹I/I ratios. PDF file			Previous \| Next doi:10.2204/iodp.proc.314315316.220.2012 Introduction Integrated Ocean Drilling Program (IODP) Expeditions 315 and 316 were carried out in 2007 and 2008 by the D/V Chikyu as part of the multistage Nankai Trough Seismogenic Zone Experiment (NanTroSEIZE) complex drilling project. During these expeditions, Kumano forearc basin sediment was cored to the upper accretionary prism as well as into the accretionary prism itself, including a fractured/brecciated zone associated with subduction processes in the Nankai Trough, Japan. Interstitial fluid collected from these sediments preserve a complex history of fluid-rock interaction and migration through the aquifer and the entire sediment body. Application of the iodine radioisotope (¹²⁹I) system has been useful to extract geochronological signatures from interstitial fluid geochemistry (Fehn et al., 2000). In this research, we focus on iodine concentrations and ¹²⁹I/I ratios in the interstitial fluid regime, covering the lithologic boundary between different sedimentary systems. Top of page \| Previous \| Next

Introduction