Consolidation and strength of Pliocene-Pleistocene sediments of ODP Leg 105 holes (Table 1)
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...
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1989
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.745591 2023-05-15T17:06:11+02:00 Consolidation and strength of Pliocene-Pleistocene sediments of ODP Leg 105 holes (Table 1) Dadey, Kathleen A Silva, Armand J 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 1989-09-28 text/tab-separated-values, 89 data points https://doi.pangaea.de/10.1594/PANGAEA.745591 https://doi.org/10.1594/PANGAEA.745591 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.745591 https://doi.org/10.1594/PANGAEA.745591 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Dadey, Kathleen A; Silva, Armand J (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 105-646A 105-646B 105-647B Coefficient Compression index DEPTH sediment/rock DRILL Drilling/drill rig Event label Joides Resolution Labrador Sea Leg105 North Atlantic Ocean Ocean Drilling Program ODP Overburden pressure Preconsolidation pressure Ratio Sample comment Shear strength primary Dataset 1989 ftpangaea https://doi.org/10.1594/PANGAEA.745591 https://doi.org/10.2973/odp.proc.sr.105.145.1989 2023-01-20T08:51:29Z 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. Dataset Labrador Sea North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-48.369100,-45.262000,58.209300,53.331300) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
105-646A 105-646B 105-647B Coefficient Compression index DEPTH sediment/rock DRILL Drilling/drill rig Event label Joides Resolution Labrador Sea Leg105 North Atlantic Ocean Ocean Drilling Program ODP Overburden pressure Preconsolidation pressure Ratio Sample comment Shear strength primary |
spellingShingle |
105-646A 105-646B 105-647B Coefficient Compression index DEPTH sediment/rock DRILL Drilling/drill rig Event label Joides Resolution Labrador Sea Leg105 North Atlantic Ocean Ocean Drilling Program ODP Overburden pressure Preconsolidation pressure Ratio Sample comment Shear strength primary Dadey, Kathleen A Silva, Armand J Consolidation and strength of Pliocene-Pleistocene sediments of ODP Leg 105 holes (Table 1) |
topic_facet |
105-646A 105-646B 105-647B Coefficient Compression index DEPTH sediment/rock DRILL Drilling/drill rig Event label Joides Resolution Labrador Sea Leg105 North Atlantic Ocean Ocean Drilling Program ODP Overburden pressure Preconsolidation pressure Ratio Sample comment Shear strength primary |
description |
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. |
format |
Dataset |
author |
Dadey, Kathleen A Silva, Armand J |
author_facet |
Dadey, Kathleen A Silva, Armand J |
author_sort |
Dadey, Kathleen A |
title |
Consolidation and strength of Pliocene-Pleistocene sediments of ODP Leg 105 holes (Table 1) |
title_short |
Consolidation and strength of Pliocene-Pleistocene sediments of ODP Leg 105 holes (Table 1) |
title_full |
Consolidation and strength of Pliocene-Pleistocene sediments of ODP Leg 105 holes (Table 1) |
title_fullStr |
Consolidation and strength of Pliocene-Pleistocene sediments of ODP Leg 105 holes (Table 1) |
title_full_unstemmed |
Consolidation and strength of Pliocene-Pleistocene sediments of ODP Leg 105 holes (Table 1) |
title_sort |
consolidation and strength of pliocene-pleistocene sediments of odp leg 105 holes (table 1) |
publisher |
PANGAEA |
publishDate |
1989 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.745591 https://doi.org/10.1594/PANGAEA.745591 |
op_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 |
long_lat |
ENVELOPE(-48.369100,-45.262000,58.209300,53.331300) |
genre |
Labrador Sea North Atlantic |
genre_facet |
Labrador Sea North Atlantic |
op_source |
Supplement to: Dadey, Kathleen A; Silva, Armand J (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 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.745591 https://doi.org/10.1594/PANGAEA.745591 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.745591 https://doi.org/10.2973/odp.proc.sr.105.145.1989 |
_version_ |
1766061203885391872 |