Physical properties of sediment core CRP-1
The relationship between whole-core compressional wave velocities and gamma-ray attenuation porosities of sediments cored at CRP-1 is examined and compared with results from core-plug samples and global models. Both core-plug and whole-core velocities show a strong dependence on porosity: this relat...
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1998
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.54619 2023-05-15T14:04:42+02:00 Physical properties of sediment core CRP-1 Niessen, Frank Jarrard, Richard D Bücker, Christian J LATITUDE: -77.007580 * LONGITUDE: 163.755080 * DATE/TIME START: 1997-10-17T01:30:00 * DATE/TIME END: 1997-10-24T02:00:00 * MINIMUM DEPTH, sediment/rock: 15.65 m * MAXIMUM DEPTH, sediment/rock: 147.66 m 1998-10-07 text/tab-separated-values, 22777 data points https://doi.pangaea.de/10.1594/PANGAEA.54619 https://doi.org/10.1594/PANGAEA.54619 en eng PANGAEA Niessen, Frank; Jarrard, Richard D; Bücker, Christian J (1998): Log-based physical properties of the CRP-1 Core, Ross Sea, Antarctica. Terra Antartica, 5(3), 299-310, hdl:10013/epic.28317.d001 https://doi.pangaea.de/10.1594/PANGAEA.54619 https://doi.org/10.1594/PANGAEA.54619 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Niessen, Frank; Jarrard, Richard D (1998): Velocity and porosity of sediments from CRP-1 drillhole, Ross Sea, Antarctica. Terra Antartica, 5(3), 311-318, hdl:10013/epic.28316.d001 16 km ENE Cape Roberts Calculated Cape Roberts Project Core wireline system CRP CRP-1 CWS Density wet bulk DEPTH sediment/rock Magnetic susceptibility volume Multi-Sensor Core Logger 17 GEOTEK off Cape Roberts Ross Sea Antarctica Porosity Sampling/drilling ice Susceptibility Velocity compressional wave Dataset 1998 ftpangaea https://doi.org/10.1594/PANGAEA.54619 2023-01-20T07:35:42Z The relationship between whole-core compressional wave velocities and gamma-ray attenuation porosities of sediments cored at CRP-1 is examined and compared with results from core-plug samples and global models. Both core-plug and whole-core velocities show a strong dependence on porosity: this relationship appears to be independent of lithology. In the range from 0.1 to 0.4 of fractional porosity (Miocene strata), plug velocities are generally 0.2 - 0.5 km s-1 higher than whole-core velocities. Possible reasons include decreased rigidity in the whole core and diagenetic changes in the plugs. Possibly both velocity measurements are correct but neither is fully representative for in situ conditions. It appears that the core-plug results are more compatible with data from other regions than the whole-core data. After removing first-order compaction control from the whole-core porosity record, a second-order control by clay content can be quantified as a simple positive linear regression (R=0.6). In contrast, after correction for first-order control, porosity and velocity are not significantly influenced by lonestone abundance except for rare, very large lonestones. Dataset Antarc* Antarctica Ross Sea PANGAEA - Data Publisher for Earth & Environmental Science Cape Roberts ENVELOPE(-70.467,-70.467,-68.950,-68.950) Ross Sea ENVELOPE(163.755080,163.755080,-77.007580,-77.007580) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
16 km ENE Cape Roberts Calculated Cape Roberts Project Core wireline system CRP CRP-1 CWS Density wet bulk DEPTH sediment/rock Magnetic susceptibility volume Multi-Sensor Core Logger 17 GEOTEK off Cape Roberts Ross Sea Antarctica Porosity Sampling/drilling ice Susceptibility Velocity compressional wave |
spellingShingle |
16 km ENE Cape Roberts Calculated Cape Roberts Project Core wireline system CRP CRP-1 CWS Density wet bulk DEPTH sediment/rock Magnetic susceptibility volume Multi-Sensor Core Logger 17 GEOTEK off Cape Roberts Ross Sea Antarctica Porosity Sampling/drilling ice Susceptibility Velocity compressional wave Niessen, Frank Jarrard, Richard D Bücker, Christian J Physical properties of sediment core CRP-1 |
topic_facet |
16 km ENE Cape Roberts Calculated Cape Roberts Project Core wireline system CRP CRP-1 CWS Density wet bulk DEPTH sediment/rock Magnetic susceptibility volume Multi-Sensor Core Logger 17 GEOTEK off Cape Roberts Ross Sea Antarctica Porosity Sampling/drilling ice Susceptibility Velocity compressional wave |
description |
The relationship between whole-core compressional wave velocities and gamma-ray attenuation porosities of sediments cored at CRP-1 is examined and compared with results from core-plug samples and global models. Both core-plug and whole-core velocities show a strong dependence on porosity: this relationship appears to be independent of lithology. In the range from 0.1 to 0.4 of fractional porosity (Miocene strata), plug velocities are generally 0.2 - 0.5 km s-1 higher than whole-core velocities. Possible reasons include decreased rigidity in the whole core and diagenetic changes in the plugs. Possibly both velocity measurements are correct but neither is fully representative for in situ conditions. It appears that the core-plug results are more compatible with data from other regions than the whole-core data. After removing first-order compaction control from the whole-core porosity record, a second-order control by clay content can be quantified as a simple positive linear regression (R=0.6). In contrast, after correction for first-order control, porosity and velocity are not significantly influenced by lonestone abundance except for rare, very large lonestones. |
format |
Dataset |
author |
Niessen, Frank Jarrard, Richard D Bücker, Christian J |
author_facet |
Niessen, Frank Jarrard, Richard D Bücker, Christian J |
author_sort |
Niessen, Frank |
title |
Physical properties of sediment core CRP-1 |
title_short |
Physical properties of sediment core CRP-1 |
title_full |
Physical properties of sediment core CRP-1 |
title_fullStr |
Physical properties of sediment core CRP-1 |
title_full_unstemmed |
Physical properties of sediment core CRP-1 |
title_sort |
physical properties of sediment core crp-1 |
publisher |
PANGAEA |
publishDate |
1998 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.54619 https://doi.org/10.1594/PANGAEA.54619 |
op_coverage |
LATITUDE: -77.007580 * LONGITUDE: 163.755080 * DATE/TIME START: 1997-10-17T01:30:00 * DATE/TIME END: 1997-10-24T02:00:00 * MINIMUM DEPTH, sediment/rock: 15.65 m * MAXIMUM DEPTH, sediment/rock: 147.66 m |
long_lat |
ENVELOPE(-70.467,-70.467,-68.950,-68.950) ENVELOPE(163.755080,163.755080,-77.007580,-77.007580) |
geographic |
Cape Roberts Ross Sea |
geographic_facet |
Cape Roberts Ross Sea |
genre |
Antarc* Antarctica Ross Sea |
genre_facet |
Antarc* Antarctica Ross Sea |
op_source |
Supplement to: Niessen, Frank; Jarrard, Richard D (1998): Velocity and porosity of sediments from CRP-1 drillhole, Ross Sea, Antarctica. Terra Antartica, 5(3), 311-318, hdl:10013/epic.28316.d001 |
op_relation |
Niessen, Frank; Jarrard, Richard D; Bücker, Christian J (1998): Log-based physical properties of the CRP-1 Core, Ross Sea, Antarctica. Terra Antartica, 5(3), 299-310, hdl:10013/epic.28317.d001 https://doi.pangaea.de/10.1594/PANGAEA.54619 https://doi.org/10.1594/PANGAEA.54619 |
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.54619 |
_version_ |
1766275937791377408 |