Physical-property data of turbidites and periplatform ooze of ODP Leg 101 holes (Table 1)
Along the slopes and in adjacent basinal areas of Bahamian platforms, periplatform ooze forms the host sediment for variable proportions of carbonate turbidites. In unlithified sections, these turbidites appear as unconsolidated layers intercalated with stiffer ooze. Within an individual turbidite,...
Main Author: | |
---|---|
Format: | Dataset |
Language: | English |
Published: |
PANGAEA
1988
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.743077 https://doi.org/10.1594/PANGAEA.743077 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.743077 |
---|---|
record_format |
openpolar |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.743077 2023-05-15T17:37:02+02:00 Physical-property data of turbidites and periplatform ooze of ODP Leg 101 holes (Table 1) Eberli, Gregor P MEDIAN LATITUDE: 25.961800 * MEDIAN LONGITUDE: -77.338440 * SOUTH-BOUND LATITUDE: 23.840700 * WEST-BOUND LONGITUDE: -78.315800 * NORTH-BOUND LATITUDE: 27.635000 * EAST-BOUND LONGITUDE: -75.435500 * DATE/TIME START: 1985-02-10T14:15:00 * DATE/TIME END: 1985-03-09T15:40:00 * MINIMUM DEPTH, sediment/rock: 0.70 m * MAXIMUM DEPTH, sediment/rock: 461.10 m 1988-07-15 text/tab-separated-values, 421 data points https://doi.pangaea.de/10.1594/PANGAEA.743077 https://doi.org/10.1594/PANGAEA.743077 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.743077 https://doi.org/10.1594/PANGAEA.743077 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Eberli, Gregor P (1988): Physical properties of carbonate turbidite sequences surrounding the Bahamas - implications for slope stability and fluid movements. In: Austin, JA Jr.; Schlager, W; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 101, 305-314, https://doi.org/10.2973/odp.proc.sr.101.150.1988 101-627B 101-628A 101-632A 101-634A 101-635A Calcium carbonate Density grain wet bulk DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Event label Joides Resolution Leg101 Lithology/composition/facies North Atlantic Ocean Ocean Drilling Program ODP Porosity Sample code/label Velocity compressional wave Water content wet mass Dataset 1988 ftpangaea https://doi.org/10.1594/PANGAEA.743077 https://doi.org/10.2973/odp.proc.sr.101.150.1988 2023-01-20T08:51:19Z Along the slopes and in adjacent basinal areas of Bahamian platforms, periplatform ooze forms the host sediment for variable proportions of carbonate turbidites. In unlithified sections, these turbidites appear as unconsolidated layers intercalated with stiffer ooze. Within an individual turbidite, differences in grain size result in variations in consolidation and physical properties. With decreasing grain size, water content and porosity decrease, and two distinct surfaces develop at the lower and upper boundaries of the turbidite. These surfaces are potential instability horizons where mass-wasting can occur. Therefore, a relation between turbidites and slumping frequency is proposed. The higher proportion of turbidites in sediments deposited on low-angle, accretionary terrains, such as the toe of the northern slope of Little Bahama Bank, probably facilitates frequent, small-scale slumping and creeping, as seen in seismic profiles. In contrast, slumping is less frequent along the steeper (12°) bypass slope in Exuma Sound, where turbidites are rarely found. Where the background sediment was initially a pelagic nannofossil ooze rather than a periplatform ooze, mineralogical composition results in lithification differences. In lithified sections having chalk as the background sediment, turbidites display a higher sonic velocity, indicating that they are the more competent beds. This lithification variation is the result of differential diagenesis between the platform-derived turbidites, enriched in metastable carbonates, and the calcitic nannofossil ooze of the background sediment. The different lithification owing to dissimilar mineralogical composition could also influence fluid migration in carbonate sequences. In a periplatform sequence, the more porous turbidite might be the fluid conduit, whereas in a pelagic sequence the chalky background sediment allows for fluid migration. Dataset North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science The Toe ENVELOPE(-59.167,-59.167,-62.333,-62.333) ENVELOPE(-78.315800,-75.435500,27.635000,23.840700) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
101-627B 101-628A 101-632A 101-634A 101-635A Calcium carbonate Density grain wet bulk DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Event label Joides Resolution Leg101 Lithology/composition/facies North Atlantic Ocean Ocean Drilling Program ODP Porosity Sample code/label Velocity compressional wave Water content wet mass |
spellingShingle |
101-627B 101-628A 101-632A 101-634A 101-635A Calcium carbonate Density grain wet bulk DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Event label Joides Resolution Leg101 Lithology/composition/facies North Atlantic Ocean Ocean Drilling Program ODP Porosity Sample code/label Velocity compressional wave Water content wet mass Eberli, Gregor P Physical-property data of turbidites and periplatform ooze of ODP Leg 101 holes (Table 1) |
topic_facet |
101-627B 101-628A 101-632A 101-634A 101-635A Calcium carbonate Density grain wet bulk DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Event label Joides Resolution Leg101 Lithology/composition/facies North Atlantic Ocean Ocean Drilling Program ODP Porosity Sample code/label Velocity compressional wave Water content wet mass |
description |
Along the slopes and in adjacent basinal areas of Bahamian platforms, periplatform ooze forms the host sediment for variable proportions of carbonate turbidites. In unlithified sections, these turbidites appear as unconsolidated layers intercalated with stiffer ooze. Within an individual turbidite, differences in grain size result in variations in consolidation and physical properties. With decreasing grain size, water content and porosity decrease, and two distinct surfaces develop at the lower and upper boundaries of the turbidite. These surfaces are potential instability horizons where mass-wasting can occur. Therefore, a relation between turbidites and slumping frequency is proposed. The higher proportion of turbidites in sediments deposited on low-angle, accretionary terrains, such as the toe of the northern slope of Little Bahama Bank, probably facilitates frequent, small-scale slumping and creeping, as seen in seismic profiles. In contrast, slumping is less frequent along the steeper (12°) bypass slope in Exuma Sound, where turbidites are rarely found. Where the background sediment was initially a pelagic nannofossil ooze rather than a periplatform ooze, mineralogical composition results in lithification differences. In lithified sections having chalk as the background sediment, turbidites display a higher sonic velocity, indicating that they are the more competent beds. This lithification variation is the result of differential diagenesis between the platform-derived turbidites, enriched in metastable carbonates, and the calcitic nannofossil ooze of the background sediment. The different lithification owing to dissimilar mineralogical composition could also influence fluid migration in carbonate sequences. In a periplatform sequence, the more porous turbidite might be the fluid conduit, whereas in a pelagic sequence the chalky background sediment allows for fluid migration. |
format |
Dataset |
author |
Eberli, Gregor P |
author_facet |
Eberli, Gregor P |
author_sort |
Eberli, Gregor P |
title |
Physical-property data of turbidites and periplatform ooze of ODP Leg 101 holes (Table 1) |
title_short |
Physical-property data of turbidites and periplatform ooze of ODP Leg 101 holes (Table 1) |
title_full |
Physical-property data of turbidites and periplatform ooze of ODP Leg 101 holes (Table 1) |
title_fullStr |
Physical-property data of turbidites and periplatform ooze of ODP Leg 101 holes (Table 1) |
title_full_unstemmed |
Physical-property data of turbidites and periplatform ooze of ODP Leg 101 holes (Table 1) |
title_sort |
physical-property data of turbidites and periplatform ooze of odp leg 101 holes (table 1) |
publisher |
PANGAEA |
publishDate |
1988 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.743077 https://doi.org/10.1594/PANGAEA.743077 |
op_coverage |
MEDIAN LATITUDE: 25.961800 * MEDIAN LONGITUDE: -77.338440 * SOUTH-BOUND LATITUDE: 23.840700 * WEST-BOUND LONGITUDE: -78.315800 * NORTH-BOUND LATITUDE: 27.635000 * EAST-BOUND LONGITUDE: -75.435500 * DATE/TIME START: 1985-02-10T14:15:00 * DATE/TIME END: 1985-03-09T15:40:00 * MINIMUM DEPTH, sediment/rock: 0.70 m * MAXIMUM DEPTH, sediment/rock: 461.10 m |
long_lat |
ENVELOPE(-59.167,-59.167,-62.333,-62.333) ENVELOPE(-78.315800,-75.435500,27.635000,23.840700) |
geographic |
The Toe |
geographic_facet |
The Toe |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Supplement to: Eberli, Gregor P (1988): Physical properties of carbonate turbidite sequences surrounding the Bahamas - implications for slope stability and fluid movements. In: Austin, JA Jr.; Schlager, W; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 101, 305-314, https://doi.org/10.2973/odp.proc.sr.101.150.1988 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.743077 https://doi.org/10.1594/PANGAEA.743077 |
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.743077 https://doi.org/10.2973/odp.proc.sr.101.150.1988 |
_version_ |
1766136741114150912 |