Consolidation characteristics of outer Bengal Fan deposits (Table 1)
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
1990
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| _version_ | 1867169034661789696 |
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| author | Wetzel, Andreas |
| author_facet | Wetzel, Andreas |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_756572 |
| institution | PANGAEA |
| language | en |
| publishDate | 1990 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Consolidation characteristics of outer Bengal Fan deposits (Table 1) Wetzel, Andreas 116-717C; 116-718C; 116-719A; Calculated from Casangrande (1936); Calculated from Marine Geotechnica Consortium (1985); Compression index; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Joides Resolution; Leg116; Ocean Drilling Program; ODP; Overburden pressure; Overconsolidation ratio; Permeability; Preconsolidation pressure; Sample code/label; South Indian Ridge, South Indian Ocean; Void Ratio description 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. |
| title | Consolidation characteristics of outer Bengal Fan deposits (Table 1) |
| topic | 116-717C; 116-718C; 116-719A; Calculated from Casangrande (1936); Calculated from Marine Geotechnica Consortium (1985); Compression index; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Joides Resolution; Leg116; Ocean Drilling Program; ODP; Overburden pressure; Overconsolidation ratio; Permeability; Preconsolidation pressure; Sample code/label; South Indian Ridge, South Indian Ocean; Void Ratio description |
| url | https://doi.org/10.1594/PANGAEA.756572 |