Physical Properties of the AND-2A Core, ANDRILL Southern McMurdo Sound Project, Antarctica
Whole-core measurements of Wet Bulk Density (WBD), compressional (P)-wave velocity (Vp), and Magnetic Susceptibility were measured at a sampling interval of 1 or 2 centimetres (cm) throughout the AND-2A drill core for initial core characterisation and on-site correlation with seismic modeling to pre...
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ftunivnebraskali:oai:digitalcommons.unl.edu:andrillrespub-1007 2023-11-12T04:05:29+01:00 Physical Properties of the AND-2A Core, ANDRILL Southern McMurdo Sound Project, Antarctica Dunbar, Gavin B. Atkins, C. Magens, D. Niessen, F. ANDRILL-SMS Science Team 2008-01-01T08:00:00Z application/pdf https://digitalcommons.unl.edu/andrillrespub/8 https://digitalcommons.unl.edu/context/andrillrespub/article/1007/viewcontent/Dunbar_TA_2008_Physical_properties.pdf unknown DigitalCommons@University of Nebraska - Lincoln https://digitalcommons.unl.edu/andrillrespub/8 https://digitalcommons.unl.edu/context/andrillrespub/article/1007/viewcontent/Dunbar_TA_2008_Physical_properties.pdf ANDRILL Research and Publications Environmental Indicators and Impact Assessment text 2008 ftunivnebraskali 2023-10-30T10:48:43Z Whole-core measurements of Wet Bulk Density (WBD), compressional (P)-wave velocity (Vp), and Magnetic Susceptibility were measured at a sampling interval of 1 or 2 centimetres (cm) throughout the AND-2A drill core for initial core characterisation and on-site correlation with seismic modeling to predict target-reflector depth. Measurements were made using a GEOTEK (Multi-Sensor-Core-Logger MSCL). Density and velocity standards were measured together with core runs of 3-6 metres (m) (and occasionally up to 18 m) throughout the entire depth range to monitor data quality. Drift of the magnetic susceptibility sensor was also monitored and corrected where necessary. These physical properties show a large range of values, reflecting the different nature of the various lithologies including extremely high velocity and density values in individual clasts, and the effects of cementation on porosity. A downcore increase in WBD and Vp occurs in the upper 200 m, however, no systematic trend exists at greater depths although large fluctuations on a m-decimetre- (dm) scale occur. Magnetic susceptibility is generally low (<100 x>10-5 SI), however, four intervals of high (>600 x 10-5 SI) susceptibility occur at 560, 800, 980 and 1 080 mbsf, indicating a relatively greater contribution of volcanic-derived material to the core site in the lower half of the AND-2A core. Text Antarc* Antarctica McMurdo Sound University of Nebraska-Lincoln: DigitalCommons@UNL McMurdo Sound |
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Open Polar |
collection |
University of Nebraska-Lincoln: DigitalCommons@UNL |
op_collection_id |
ftunivnebraskali |
language |
unknown |
topic |
Environmental Indicators and Impact Assessment |
spellingShingle |
Environmental Indicators and Impact Assessment Dunbar, Gavin B. Atkins, C. Magens, D. Niessen, F. ANDRILL-SMS Science Team Physical Properties of the AND-2A Core, ANDRILL Southern McMurdo Sound Project, Antarctica |
topic_facet |
Environmental Indicators and Impact Assessment |
description |
Whole-core measurements of Wet Bulk Density (WBD), compressional (P)-wave velocity (Vp), and Magnetic Susceptibility were measured at a sampling interval of 1 or 2 centimetres (cm) throughout the AND-2A drill core for initial core characterisation and on-site correlation with seismic modeling to predict target-reflector depth. Measurements were made using a GEOTEK (Multi-Sensor-Core-Logger MSCL). Density and velocity standards were measured together with core runs of 3-6 metres (m) (and occasionally up to 18 m) throughout the entire depth range to monitor data quality. Drift of the magnetic susceptibility sensor was also monitored and corrected where necessary. These physical properties show a large range of values, reflecting the different nature of the various lithologies including extremely high velocity and density values in individual clasts, and the effects of cementation on porosity. A downcore increase in WBD and Vp occurs in the upper 200 m, however, no systematic trend exists at greater depths although large fluctuations on a m-decimetre- (dm) scale occur. Magnetic susceptibility is generally low (<100 x>10-5 SI), however, four intervals of high (>600 x 10-5 SI) susceptibility occur at 560, 800, 980 and 1 080 mbsf, indicating a relatively greater contribution of volcanic-derived material to the core site in the lower half of the AND-2A core. |
format |
Text |
author |
Dunbar, Gavin B. Atkins, C. Magens, D. Niessen, F. ANDRILL-SMS Science Team |
author_facet |
Dunbar, Gavin B. Atkins, C. Magens, D. Niessen, F. ANDRILL-SMS Science Team |
author_sort |
Dunbar, Gavin B. |
title |
Physical Properties of the AND-2A Core, ANDRILL Southern McMurdo Sound Project, Antarctica |
title_short |
Physical Properties of the AND-2A Core, ANDRILL Southern McMurdo Sound Project, Antarctica |
title_full |
Physical Properties of the AND-2A Core, ANDRILL Southern McMurdo Sound Project, Antarctica |
title_fullStr |
Physical Properties of the AND-2A Core, ANDRILL Southern McMurdo Sound Project, Antarctica |
title_full_unstemmed |
Physical Properties of the AND-2A Core, ANDRILL Southern McMurdo Sound Project, Antarctica |
title_sort |
physical properties of the and-2a core, andrill southern mcmurdo sound project, antarctica |
publisher |
DigitalCommons@University of Nebraska - Lincoln |
publishDate |
2008 |
url |
https://digitalcommons.unl.edu/andrillrespub/8 https://digitalcommons.unl.edu/context/andrillrespub/article/1007/viewcontent/Dunbar_TA_2008_Physical_properties.pdf |
geographic |
McMurdo Sound |
geographic_facet |
McMurdo Sound |
genre |
Antarc* Antarctica McMurdo Sound |
genre_facet |
Antarc* Antarctica McMurdo Sound |
op_source |
ANDRILL Research and Publications |
op_relation |
https://digitalcommons.unl.edu/andrillrespub/8 https://digitalcommons.unl.edu/context/andrillrespub/article/1007/viewcontent/Dunbar_TA_2008_Physical_properties.pdf |
_version_ |
1782342006169665536 |