Dadey, Kathleen A; Silva, Armand J (1989): Consolidation and strength of Pliocene-Pleistocene sediments of ODP Leg 105 holes (Table 1) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.745591, Supplement to: Dadey, KA; Silva, AJ (1989): Consolidation and strength of Pliocene-Pleistocene sediments from Sites 646 and 647, ODP Leg 105. In: Srivastava, SP; Arthur, M; Clement, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 105, 791-796, https://doi.org/10.2973/odp.proc.sr.105.145.1989
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Abstract:
Based on laboratory geotechnical tests, the stress history of sediment drift deposits at two Ocean Drilling Program (ODP) sites of Leg 105 is analyzed. Geological analyses of Sites 646 and 647 indicate that sedimentation is primarily controlled by bottom currents having periodic turbidite sequences and no significant hiatuses. Consolidation tests on a limited number of good quality subsamples and other supporting data show that sediments deeper than approximately 5 to at least 150 meters below seafloor (mbsf) are significantly underconsolidated (i.e., these sediments are still consolidating under the existing overburden stresses) and have overconsolidation ratios of less than 0.4 below 50 mbsf. Possible explanations for this underconsolidation include relatively high rates of sedimentation (up to 80 m/m.y.), low permeability layers, an upper zone (~5 m) of apparently overconsolidated sediment, high concentrations of siliceous microfossils, and the existence of nonlinear flow behavior at low hydraulic gradients.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 56.583300 * Median Longitude: -47.333400 * South-bound Latitude: 53.331300 * West-bound Longitude: -48.369100 * North-bound Latitude: 58.209300 * East-bound Longitude: -45.262000
Date/Time Start: 1985-10-03T05:45:00 * Date/Time End: 1985-10-25T06:15:00
Minimum DEPTH, sediment/rock: 4.47 m * Maximum DEPTH, sediment/rock: 213.47 m
Event(s):
105-646A * Latitude: 58.209300 * Longitude: -48.369100 * Date/Time Start: 1985-10-03T05:45:00 * Date/Time End: 1985-10-04T05:30:00 * Elevation: -3460.0 m * Penetration: 103.5 m * Recovery: 92.14 m * Location: Labrador Sea * Campaign: Leg105 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 11 core; 103.5 m cored; 0 m drilled; 89 % recovery
105-646B * Latitude: 58.209300 * Longitude: -48.369100 * Date/Time Start: 1985-10-04T08:45:00 * Date/Time End: 1985-10-13T21:01:00 * Elevation: -3459.0 m * Penetration: 766.7 m * Recovery: 404.25 m * Location: Labrador Sea * Campaign: Leg105 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 80 cores; 766.2 m cored; 0 m drilled; 52.8 % recovery
105-647B * Latitude: 53.331300 * Longitude: -45.262000 * Date/Time Start: 1985-10-23T18:15:00 * Date/Time End: 1985-10-25T06:15:00 * Elevation: -3871.0 m * Penetration: 103.3 m * Recovery: 93.17 m * Location: South Atlantic Ocean * Campaign: Leg105 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 11 core; 103.3 m cored; 0 m drilled; 90.2 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 3 | Overburden pressure | Overb press | kPa | Dadey, Kathleen A | ||
| 4 | Preconsolidation pressure | Pc | kPa | Dadey, Kathleen A | ||
| 5 | Ratio | Ratio | Dadey, Kathleen A | overconsolidation ratio | ||
| 6 | Compression index | Cc | Dadey, Kathleen A | |||
| 7 | Coefficient | Coeff | Dadey, Kathleen A | coefficient of permeability | ||
| 8 | Shear strength, primary | Shear str | kPa | Dadey, Kathleen A | undrained | |
| 9 | Sample comment | Sample comment | Dadey, Kathleen A |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
89 data points