20. COMPARISON OF NATURAL GAMMA RAY ACTIVITY PROFILES FROM DOWNHOLE LOGGING AND THE MST CORE LOGGER AT SITE 911 (YERMAK PLATEAU)1
The newly installed multisensor track (MST) natural gamma ray activity spectrometer should provide a powerful way to correlate between recovered cores and logging data. We evaluate its use for this purpose at Ocean Drilling Project Site 911 on the Yermak Plateau, in which 500 m of silty clays and cl...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.551.7135 2023-05-15T18:45:46+02:00 20. COMPARISON OF NATURAL GAMMA RAY ACTIVITY PROFILES FROM DOWNHOLE LOGGING AND THE MST CORE LOGGER AT SITE 911 (YERMAK PLATEAU)1 Mitchell Lyle James Bristow Jan Bloemendal Frank R. Rack The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.551.7135 http://www-odp.tamu.edu/publications/151_SR/VOLUME/CHAPTERS/sr151_20.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.551.7135 http://www-odp.tamu.edu/publications/151_SR/VOLUME/CHAPTERS/sr151_20.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www-odp.tamu.edu/publications/151_SR/VOLUME/CHAPTERS/sr151_20.pdf text ftciteseerx 2016-01-08T11:35:28Z The newly installed multisensor track (MST) natural gamma ray activity spectrometer should provide a powerful way to correlate between recovered cores and logging data. We evaluate its use for this purpose at Ocean Drilling Project Site 911 on the Yermak Plateau, in which 500 m of silty clays and clayey silts were recovered. We found that significant corrections need to be made to the MST natural gamma ray activity data before profiles can be constructed. The important corrections are for back-ground, porosity, voids, and cracks, and for an inefficient detector geometry. With these corrections, however, a good match between the MST profile and the logging data can be made. The logging profile can then be used to assign depths and identify gaps in the section of the hole cored by the extended core barrel (XCB). We also tried to use the MST natural gamma ray activ-ity data to calculate potassium (K) contents of Site 911 sediments, but failed to establish any correlation between K contents of the clays measured by X-ray fluorescence spectrometer (XRF) and the K-specific gamma ray activity. We believe that this is primarily a problem of detector sensitivity and the relatively small range of variation of K contents in Site 911 sediments. Text Yermak plateau Unknown Yermak Plateau ENVELOPE(5.000,5.000,81.250,81.250) |
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Open Polar |
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ftciteseerx |
language |
English |
description |
The newly installed multisensor track (MST) natural gamma ray activity spectrometer should provide a powerful way to correlate between recovered cores and logging data. We evaluate its use for this purpose at Ocean Drilling Project Site 911 on the Yermak Plateau, in which 500 m of silty clays and clayey silts were recovered. We found that significant corrections need to be made to the MST natural gamma ray activity data before profiles can be constructed. The important corrections are for back-ground, porosity, voids, and cracks, and for an inefficient detector geometry. With these corrections, however, a good match between the MST profile and the logging data can be made. The logging profile can then be used to assign depths and identify gaps in the section of the hole cored by the extended core barrel (XCB). We also tried to use the MST natural gamma ray activ-ity data to calculate potassium (K) contents of Site 911 sediments, but failed to establish any correlation between K contents of the clays measured by X-ray fluorescence spectrometer (XRF) and the K-specific gamma ray activity. We believe that this is primarily a problem of detector sensitivity and the relatively small range of variation of K contents in Site 911 sediments. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Mitchell Lyle James Bristow Jan Bloemendal Frank R. Rack |
spellingShingle |
Mitchell Lyle James Bristow Jan Bloemendal Frank R. Rack 20. COMPARISON OF NATURAL GAMMA RAY ACTIVITY PROFILES FROM DOWNHOLE LOGGING AND THE MST CORE LOGGER AT SITE 911 (YERMAK PLATEAU)1 |
author_facet |
Mitchell Lyle James Bristow Jan Bloemendal Frank R. Rack |
author_sort |
Mitchell Lyle |
title |
20. COMPARISON OF NATURAL GAMMA RAY ACTIVITY PROFILES FROM DOWNHOLE LOGGING AND THE MST CORE LOGGER AT SITE 911 (YERMAK PLATEAU)1 |
title_short |
20. COMPARISON OF NATURAL GAMMA RAY ACTIVITY PROFILES FROM DOWNHOLE LOGGING AND THE MST CORE LOGGER AT SITE 911 (YERMAK PLATEAU)1 |
title_full |
20. COMPARISON OF NATURAL GAMMA RAY ACTIVITY PROFILES FROM DOWNHOLE LOGGING AND THE MST CORE LOGGER AT SITE 911 (YERMAK PLATEAU)1 |
title_fullStr |
20. COMPARISON OF NATURAL GAMMA RAY ACTIVITY PROFILES FROM DOWNHOLE LOGGING AND THE MST CORE LOGGER AT SITE 911 (YERMAK PLATEAU)1 |
title_full_unstemmed |
20. COMPARISON OF NATURAL GAMMA RAY ACTIVITY PROFILES FROM DOWNHOLE LOGGING AND THE MST CORE LOGGER AT SITE 911 (YERMAK PLATEAU)1 |
title_sort |
20. comparison of natural gamma ray activity profiles from downhole logging and the mst core logger at site 911 (yermak plateau)1 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.551.7135 http://www-odp.tamu.edu/publications/151_SR/VOLUME/CHAPTERS/sr151_20.pdf |
long_lat |
ENVELOPE(5.000,5.000,81.250,81.250) |
geographic |
Yermak Plateau |
geographic_facet |
Yermak Plateau |
genre |
Yermak plateau |
genre_facet |
Yermak plateau |
op_source |
http://www-odp.tamu.edu/publications/151_SR/VOLUME/CHAPTERS/sr151_20.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.551.7135 http://www-odp.tamu.edu/publications/151_SR/VOLUME/CHAPTERS/sr151_20.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766236934441533440 |