Soh, Wonn; Byrne, Timothy; Taira, Asahiko; Kono, Atsushi (1993): (Table 2) CT scan measurements of ODP Site 131-808 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.785120, Supplement to: Soh, W et al. (1993): Computed tomography (CT) scan image analysis of Site 808 cores: structural and physical property implications. In: Hill, IA; Taira, A; Firth, JV; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 131, 135-140, https://doi.org/10.2973/odp.proc.sr.131.113.1993
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Published: 1993 (exact date unknown) • DOI registered: 2012-07-25
Abstract:
X-ray computed tomography (CT) is a promising tool that yields data useful for understanding the fine-scale density structure of partly lithified and tectonically deformed sediments. We conducted 21 CT scans of ODP Leg 131 sediments, including whole-round cores and thin-section chips, obtained from the toe of the Nankai accretionary prism. The samples range from highly deformed pieces from the frontal thrust and décollement to homogeneous and essentially undeformed sediments above the frontal thrust and beneath the décollement. In the CT images, kink-like deformation bands and faults are recognized as obvious bright seams, bands, or stripes with relatively high linear attenuation coefficients. The differences in linear attenuation coefficients relative to the matrix range from 0.021 cm**2/g (kink-like deformation band) to 0.038 cm**2/g (fault). These data suggest a 0.10 g/cm**3 to 0.18 g/cm**3 increase in bulk density within the deformation structures, and they appear to be 13% and 33% more compacted than the nondeformed matrix, respectively. In contrast to the samples from the frontal thrust zone, CT images of the décollement sample exhibit relatively homogeneous textures. The attenuation coefficient of the sample of the décollement indicates bulk density and porosity values of 2.45 g/cm**3 and 18%, respectively. The sample, hence, is approximately 50% more compacted than the sediment outside the décollement zone.
Related to:
Taira, Asahiko; Hill, Ian Ashley; Firth, John V; Berner, Ulrich; Brückmann, Warner; Byrne, Timothy; Chabernau, T; Fisher, Andrew T; Foucher, Jean Paul; Gamo, Toshitaka; Gieskes, Joris M; Hyndman, Roy D; Karig, Daniel E; Kastner, Miriam; Kato, Yukihiro; Lallemant, Siegfried J; Lu, Ran; Maltman, Alex J; Moore, Gerald F; Moran, K; Olafsson, Gunnar; Owens, W Brechner; Pickering, Kevin T; Siena, Franca; Taylor, Elliott; Underwood, Michael B; Wilkinson, Clive; Yamano, Makoto; Zhang, J (1992): Sediment deformation and hydrogeology of the Nankai Trough accretionary prism: Synthesis of shipboard results of ODP Leg. Earth and Planetary Science Letters, 109(3-4), 431-450, https://doi.org/10.1016/0012-821X(92)90104-4
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 32.352150 * Longitude: 134.944367
Date/Time Start: 1990-04-04T00:00:00 * Date/Time End: 1990-05-31T00:00:00
Minimum DEPTH, sediment/rock: 43.20 m * Maximum DEPTH, sediment/rock: 1262.60 m
Event(s):
131-808 * Latitude: 32.352150 * Longitude: 134.944367 * Date/Time Start: 1990-04-04T00:00:00 * Date/Time End: 1990-05-31T00:00:00 * Elevation: -4685.1 m * Penetration: 4130.2 m * Recovery: 732.1 m * Location: Philippine Sea * Campaign: Leg131 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 163 cores; 1463.3 m cored; 1980 m drilled; 50% recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Soh, Wonn | DSDP/ODP/IODP sample designation | ||
| 2 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 3 | Attenuation value | Attenuation | cm2/g | Soh, Wonn | X-ray computed tomography (CT) | |
| 4 | Attenuation value, standard deviation | Attenuation std dev | ± | Soh, Wonn | X-ray computed tomography (CT) | |
| 5 | Attenuation value | Attenuation | cm2/g | Soh, Wonn | X-ray computed tomography (CT) | |
| 6 | Sample comment | Sample comment | Soh, Wonn | X-ray computed tomography (CT) | ||
| 7 | Density, wet bulk | WBD | g/cm3 | Taira, Asahiko | from Taira et al. (1992) | |
| 8 | Porosity | Poros | % vol | Taira, Asahiko | from Taira et al. (1992) |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
116 data points