Wetzel, Andreas (1990): Consolidation characteristics of outer Bengal Fan deposits (Table 1) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.756572, Supplement to: Wetzel, A (1990): Consolidation characteristics and permeability of Bengal Fan sediments drilled during Leg 116. In: Cochran, JR; Stow, DAV; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 116, 363-368, https://doi.org/10.2973/odp.proc.sr.116.145.1990
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Abstract:
The state of consolidation of outer Bengal Fan deposits is closely related to their depositional history. Early Pleistocene sediments are underconsolidated, i.e., fabric strength is lower than under equilibrium with the present overburden stress, at depths greater than 60-80 mbsf. This may be due to rapid accumulation (>15-20 cm/k.y.) and overlying low-permeability (<10**-7 cm/s) deposits. The underlying Pliocene sediments are overconsolidated, i.e., fabric strength is higher than in equilibrium with the present overburden stress; at Sites 717 and 719 the sediments are slightly overconsolidated, whereas at Site 718 the overconsolidation is significant. Overconsolidation is explained by erosion that occurred during the early Pleistocene for which a stratigraphic gap was recorded in the drilled cores. The eroded section is estimated to be in the range of 10-40 m at Sites 717 and 719, respectively, and 130-150 m at Site 718. Below 250-300 mbsf the most sediments are normally consolidated. The amount of erosion seems to be related to block rotation and uplift due to intraplate deformation.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -0.970500 * Median Longitude: 81.396900 * South-bound Latitude: -1.020900 * West-bound Longitude: 81.390100 * North-bound Latitude: -0.929800 * East-bound Longitude: 81.401100
Date/Time Start: 1987-07-10T00:00:00 * Date/Time End: 1987-08-02T00:00:00
Minimum DEPTH, sediment/rock: 0.78 m * Maximum DEPTH, sediment/rock: 810.65 m
Event(s):
116-717C * Latitude: -0.929800 * Longitude: 81.390100 * Date/Time: 1987-07-10T00:00:00 * Elevation: -4746.0 m * Penetration: 828.2 m * Recovery: 480.52 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg116 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 87 cores; 814.7 m cored; 0 m drilled; 59 % recovery
116-718C * Latitude: -1.020900 * Longitude: 81.401100 * Date/Time: 1987-07-20T00:00:00 * Elevation: -4741.0 m * Penetration: 935 m * Recovery: 274.05 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg116 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 98 cores; 925.7 m cored; 0 m drilled; 29.6 % recovery
116-719A * Latitude: -0.960800 * Longitude: 81.399500 * Date/Time: 1987-08-02T00:00:00 * Elevation: -4747.0 m * Penetration: 460.2 m * Recovery: 185.53 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg116 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 49 cores; 460.2 m cored; 0 m drilled; 40.3 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Sample code/label | Sample label | Wetzel, Andreas | DSDP/ODP/IODP sample designation | ||
| 3 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 4 | Overburden pressure | Overb press | kPa | Wetzel, Andreas | ||
| 5 | Void Ratio description | Void Ratio | Wetzel, Andreas | ez | ||
| 6 | Preconsolidation pressure | Pc | kPa | Wetzel, Andreas | Calculated from Casangrande (1936) | minimum |
| 7 | Preconsolidation pressure | Pc | kPa | Wetzel, Andreas | Calculated from Marine Geotechnica Consortium (1985) | maximum |
| 8 | Overconsolidation ratio | Pc/Po | Wetzel, Andreas | Calculated from Casangrande (1936) | minimum | |
| 9 | Overconsolidation ratio | Pc/Po | Wetzel, Andreas | Calculated from Marine Geotechnica Consortium (1985) | maximum | |
| 10 | Compression index | Cc | Wetzel, Andreas | |||
| 11 | Permeability | Permeab | cm/s | Wetzel, Andreas | ||
| 12 | Void Ratio description | Void Ratio | Wetzel, Andreas | Calculated from Casangrande (1936) | ec, minimum | |
| 13 | Void Ratio description | Void Ratio | Wetzel, Andreas | Calculated from Marine Geotechnica Consortium (1985) | ec, maximum |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
351 data points