Data report; Permeability and consolidation behavior of sediments from the northern Japan Trench subduction zone, IODP Site C0019

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doi: 10.2204/iodp.proc.343343T.201.2015
Author(s): Valdez, Robert D., II; Lauer, Rachel M.; Ikari, Matt J.; Kitajima, Hiroko; Saffer, Demian M.
Integrated Ocean Drilling Program, Expedition 343/343T Scientists, College Station, TX
Author Affiliation(s): Primary:
Pennsylvania State University, Department of Geosciences, University Park, PA, United States
Other:
Texas A&M University, United States
Japan Agency for Marine-Earth Science and Technology, Japan
University of Leicester, United Kingdom
GEOMAR-Helmholtz Centre for Ocean Research Kiel, Germany
University of Calcutta, India
CEREGE, France
University of Southampton, United Kingdom
University of Texas-Austin, United States
University of Bremen, Germany
University of Wisconsin-Madison, United States
University of Tokyo, Japan
University of California-Santa Cruz, United States
Osaka City University, Japan
Pennsylvania State University, United States
Universita di Modena e Reggio Emilia, Italy
McGill University, Canada
Northern Arizona University, United States
University of Victoria, Canada
University of Otago, New Zealand
University of Tsukuba, Japan
University of New Hampshire, United States
China Earthquake Administration, China
Volume Title: Proceedings of the Integrated Ocean Drilling Program; Japan Trench Fast Drilling Project (JFAST); Expedition 343/343T of the riser drilling platform; Shimizu, Japan, to Sendai, Japan; Site C0019, 1 April-24 May 2012; and Minami-Ise, Japan, to Hachinohe, Japan; Site C0019, 5-19 July 2012
Volume Author(s): Mori, James J.; Chester, Frederick M.; Eguchi, Nobuhisa; Toczko, Sean; Kido, Yukari; Saito, Saneatsu; Sanada, Yoshinori; Anderson, Louise; Behrmann, Jan H.; Bose, Santanu; Conin, Marianne; Cook, Becky; Fulton, Patrick; Hirose, Takehiro; Ikari, Matt; Ishikmawa, Tsuyoshi; Jeppson, Tamara; Kameda, Jun; Kirkpatrick, James; Lin, Weiren; Mishima, Toshiaki; Moore, J. Casey; Nakamura, Yasuyuki; Regalla, Christine; Remitti, Francesca; Rowe, Christie; Sample, James; Sun, Tianhaozhe; Takai, Ken; Toy, Virginia G.; Ujiie, Kohtaro; Wolfson, Monica; Yang Tao
Source: Proceedings of the Integrated Ocean Drilling Program; Japan Trench Fast Drilling Project (JFAST); Expedition 343/343T of the riser drilling platform; Shimizu, Japan, to Sendai, Japan; Site C0019, 1 April-24 May 2012; and Minami-Ise, Japan, to Hachinohe, Japan; Site C0019, 5-19 July 2012, James J. Mori, Frederick M. Chester, Nobuhisa Eguchi, Sean Toczko, Yukari Kido, Saneatsu Saito, Yoshinori Sanada, Louise Anderson, Jan H. Behrmann, Santanu Bose, Marianne Conin, Becky Cook, Patrick Fulton, Takehiro Hirose, Matt Ikari, Tsuyoshi Ishikmawa, Tamara Jeppson, Jun Kameda, James Kirkpatrick, Weiren Lin, Toshiaki Mishima, J. Casey Moore, Yasuyuki Nakamura, Christine Regalla, Francesca Remitti, Christie Rowe, James Sample, Tianhaozhe Sun, Ken Takai, Virginia G. Toy, Kohtaro Ujiie, Monica Wolfson and Yang Tao; Integrated Ocean Drilling Program, Expedition 343/343T Scientists, College Station, TX. Proceedings of the Integrated Ocean Drilling Program (Online), Vol.343/343T, 23p. Publisher: Integrated Ocean Drilling Program Management International for the Integrated Drilling Program (IODP), Washington, DC, United States. ISSN: 1930-1014 CODEN: IDSDA6
Note: In English. 13 refs.; illus., incl. 4 tables, sketch map
Summary: Sediment hydraulic properties and consolidation behavior are key parameters that affect pore pressure generation, fluid migration, deformation, and slip behavior and mechanical strength of subduction zone megathrusts. We report on a set of constant rate of strain consolidation experiments and isostatic deformation and permeability experiments on whole-round core samples obtained during Integrated Ocean Drilling Program (IODP) Expedition 343 as part of the Japan Trench Fast Drilling Project (JFAST). The samples were collected from the frontal prism at 697.18 meters below seafloor (mbsf) and the underthrust sediment section at 831.45 mbsf at IODP Site C0019, 6.0 km landward of the Japan Trench. The permeability of sediment from the frontal prism decreases from 7.3×10-18 to 3.5×10-19 m2 as effective mean stress increases from 14.6 to 62.3 MPa under a uniaxial loading path and from 5.4×10-18 to 2.9×10-19 m2 over effective stresses from 3.6 to 54.6 MPa under an isostatic loading path. Porosity decreases from 46% to 27% as effective mean stress increases from 0.73 to 62.3 MPa and 46% to 29% as stress increases from 3.6 to 64.6 MPa for uniaxial and isostatic loading of the prism sediment, respectively. Permeability of the underthrust sediment sample decreases from 4.0×10-18 to 3.2×10-19 m2 as stress increases from 3.6 to 86.6 MPa under isostatic conditions. Porosity decreases from 49% to 37% over the stress range from 0.73 to 69.6 MPa and 48% to 36% from 3.6 to 86.6 MPa for uniaxial and isostatic loading paths, respectively. For both samples, permeability exhibits a log-linear decrease with decreasing porosity. In situ permeability for the prism and underthrust sediment samples are estimated from our laboratory-defined permeability-porosity relationships. The in situ porosity values for the prism sediment samples are 44% and 45% for uniaxial and isostatic conditions, respectively. The corresponding in situ permeability values are 4.3×10-18 and 4.9×10-18 m2. In situ porosity for the underthrust sample is 47% under both uniaxial and isostatic conditions. The permeability value for the underthrust sediment sample is 4.0×10-18 m2 under isostatic loading conditions. The coefficient of consolidation (Cv) decreases with increasing effective axial stress to near-constant values of 4.2×10-7 and 9.0×10-6 m2/s, and the compression index (Cc) is 0.70 and 0.57 for the prism and underthrust sediment samples, respectively. Preconsolidation stresses (Pc') for the prism and underthrust samples, defined using the Casagrande method, are 17.0 and 20.5 MPa, respectively, and correspond to overconsolidation ratios of 3.1 and 2.8.
Year of Publication: 2015
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 07 Marine Geology and Oceanography; 30 Engineering Geology; Boreholes; Consolidation; Consolidometer tests; Cores; Expeditions 343/343T; Experimental studies; IODP Site C0019; Integrated Ocean Drilling Program; Japan Trench; Japan Trench Fast Drilling Project; Laboratory studies; Loading; Marine sediments; Mechanical properties; North Pacific; Northwest Pacific; Pacific Ocean; Permeability; Physical properties; Pore pressure; Porosity; Rates; Sediments; Soil mechanics; Strain; Stress; Uniaxial tests; West Pacific
Coordinates: N375619 N375620 E1435449 E1435447
Record ID: 2015017330
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