(Table 1) Petrological description and consolidation properties of ODP Site 186-1150 and Hole 186-1151A

DOI

In order to determine the shear parameters of the forearc sedimentary strata drilled during Ocean Drilling Program Leg 186, West Pacific Seismic Network, Japan Trench, eight whole-round samples were selected from different depths in the drilled sections of Sites 1150 and 1151. Whereas Site 1150 lays above the seismically active part of the subduction zone, Site 1151 is situated in an aseismic zone. The aim of the triaxial tests was, apart from determination of the static stress strain behavior of the sediments, to test the hypothesis that the static stress strain parameter could differ for each sites. In order to simulate undrained deformation conditions according to the high clay mineral content of the strata, consolidated undrained shear tests were performed in a triaxial testing setup. Measurements of water content, grain density, organic content, and microtextural investigations under the scanning electron microscope (SEM) accompanied the compression experiments. After the saturation and consolidation stages were completed, failure occurred in the compression stage of the experiments at peak strengths of 280-7278 kPa. The stiffness moduli calculated for each sample from differential stress vs. strain curves show a linear relationship with depth and range between 181 and 5827 kPa. Under the SEM, the artificial fault planes of the tested specimen only show partial alignment of clay minerals because of the high content of microfossils.

Supplement to: Roller, Sybille; Pohl, C; Behrmann, Jan-Hinrich (2003): Data report: Triaxial shear strength of sediments and sedimentary rocks from the Japan Trench, ODP Leg 186. In: Suyehiro, K; Sacks, IS; Acton, GD; Oda, M (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 186, 1-19

Identifier
DOI https://doi.org/10.1594/PANGAEA.783903
Related Identifier https://doi.org/10.2973/odp.proc.sr.186.115.2003
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.783903
Provenance
Creator Roller, Sybille; Pohl, C; Behrmann, Jan-Hinrich
Publisher PANGAEA
Publication Year 2003
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Language English
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 185 data points
Discipline Earth System Research
Spatial Coverage (143.332W, 38.752S, 143.334E, 39.182N); North Pacific Ocean
Temporal Coverage Begin 1999-06-22T18:30:00Z
Temporal Coverage End 1999-08-02T17:45:00Z