Lithostratigraphy determined from downhole logs in the AND-2A borehole
During the 2007-2008 austral spring season, the ANDRILL (Antarctic Drilling project) Southern McMurdo Sound Project recovered an 1138-m-long core, representing the last 20 m.y. of glacial history. An extensive downhole logging program was successfully carried out. Due to drill hole conditions, logs...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.834632 2024-09-15T17:40:43+00:00 Lithostratigraphy determined from downhole logs in the AND-2A borehole Hunze, Sabine Schröder, Henning Kuhn, Gerhard Wonik, Thomas LATITUDE: -77.758141 * LONGITUDE: 165.276765 * DATE/TIME START: 2007-10-10T12:00:00 * DATE/TIME END: 2007-11-30T12:00:00 2014 application/zip, 4 datasets https://doi.pangaea.de/10.1594/PANGAEA.834632 https://doi.org/10.1594/PANGAEA.834632 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.834632 https://doi.org/10.1594/PANGAEA.834632 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Hunze, Sabine; Schröder, Henning; Kuhn, Gerhard; Wonik, Thomas (2013): Lithostratigraphy determined from downhole logs in the AND-2A borehole, southern Victoria Land Basin, McMurdo Sound, Antarctica. Geosphere, 9(1), 63-73, https://doi.org/10.1130/GES00774.1 AND-2A ANDRILL Antarctic Geological Drilling AWI_Paleo DRILL Drilling/drill rig McMurdo Sound McMurdo Station Paleoenvironmental Reconstructions from Marine Sediments @ AWI Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SMS Southern McMurdo Sound SPP1158 dataset publication series 2014 ftpangaea https://doi.org/10.1594/PANGAEA.83463210.1130/GES00774.1 2024-07-24T02:31:21Z During the 2007-2008 austral spring season, the ANDRILL (Antarctic Drilling project) Southern McMurdo Sound Project recovered an 1138-m-long core, representing the last 20 m.y. of glacial history. An extensive downhole logging program was successfully carried out. Due to drill hole conditions, logs were collected in several passes from the total depth at 1138.54 m below seafloor (mbsf) to 230 mbsf. After data correction, several statistical methods, such as factor analysis, cluster analysis, box-and-whisker diagrams, and cross-plots, were applied. The aim of these analyses was to use detailed interpretation of the downhole logs to obtain a description of the lithologies and their specific physical properties that is independent of the core descriptions. The sediments were grouped into the three main facies, diamictite, mudstone and/or siltstone, and sandstone, and the physical properties of each were determined. Notable findings include the high natural radioactivity values in sandstone and the high and low magnetic susceptibility values in mudstone and/or siltstone and in sandstone. A modified lithology cluster column was produced on the basis of the downhole logs and statistical analyses. It was possible to use the uranium content in the downhole logs to determine hiatuses and thus more accurately place the estimated hiatuses. Using analyses from current literature (geochemistry, clasts, and clay minerals) in combination with the downhole logs (cluster analysis), the depths 225 mbsf, 650 mbsf, 775 mbsf, and 900 mbsf were identified as boundaries of change in sediment composition, provenance, and/or environmental conditions. The main use of log interpretation is the exact definition of lithological boundaries and the modification of the paleoenvironmental interpretation. Other/Unknown Material Antarc* Antarctic Magnetic susceptibility McMurdo Sound Sea ice PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(165.276765,165.276765,-77.758141,-77.758141) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AND-2A ANDRILL Antarctic Geological Drilling AWI_Paleo DRILL Drilling/drill rig McMurdo Sound McMurdo Station Paleoenvironmental Reconstructions from Marine Sediments @ AWI Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SMS Southern McMurdo Sound SPP1158 |
spellingShingle |
AND-2A ANDRILL Antarctic Geological Drilling AWI_Paleo DRILL Drilling/drill rig McMurdo Sound McMurdo Station Paleoenvironmental Reconstructions from Marine Sediments @ AWI Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SMS Southern McMurdo Sound SPP1158 Hunze, Sabine Schröder, Henning Kuhn, Gerhard Wonik, Thomas Lithostratigraphy determined from downhole logs in the AND-2A borehole |
topic_facet |
AND-2A ANDRILL Antarctic Geological Drilling AWI_Paleo DRILL Drilling/drill rig McMurdo Sound McMurdo Station Paleoenvironmental Reconstructions from Marine Sediments @ AWI Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SMS Southern McMurdo Sound SPP1158 |
description |
During the 2007-2008 austral spring season, the ANDRILL (Antarctic Drilling project) Southern McMurdo Sound Project recovered an 1138-m-long core, representing the last 20 m.y. of glacial history. An extensive downhole logging program was successfully carried out. Due to drill hole conditions, logs were collected in several passes from the total depth at 1138.54 m below seafloor (mbsf) to 230 mbsf. After data correction, several statistical methods, such as factor analysis, cluster analysis, box-and-whisker diagrams, and cross-plots, were applied. The aim of these analyses was to use detailed interpretation of the downhole logs to obtain a description of the lithologies and their specific physical properties that is independent of the core descriptions. The sediments were grouped into the three main facies, diamictite, mudstone and/or siltstone, and sandstone, and the physical properties of each were determined. Notable findings include the high natural radioactivity values in sandstone and the high and low magnetic susceptibility values in mudstone and/or siltstone and in sandstone. A modified lithology cluster column was produced on the basis of the downhole logs and statistical analyses. It was possible to use the uranium content in the downhole logs to determine hiatuses and thus more accurately place the estimated hiatuses. Using analyses from current literature (geochemistry, clasts, and clay minerals) in combination with the downhole logs (cluster analysis), the depths 225 mbsf, 650 mbsf, 775 mbsf, and 900 mbsf were identified as boundaries of change in sediment composition, provenance, and/or environmental conditions. The main use of log interpretation is the exact definition of lithological boundaries and the modification of the paleoenvironmental interpretation. |
format |
Other/Unknown Material |
author |
Hunze, Sabine Schröder, Henning Kuhn, Gerhard Wonik, Thomas |
author_facet |
Hunze, Sabine Schröder, Henning Kuhn, Gerhard Wonik, Thomas |
author_sort |
Hunze, Sabine |
title |
Lithostratigraphy determined from downhole logs in the AND-2A borehole |
title_short |
Lithostratigraphy determined from downhole logs in the AND-2A borehole |
title_full |
Lithostratigraphy determined from downhole logs in the AND-2A borehole |
title_fullStr |
Lithostratigraphy determined from downhole logs in the AND-2A borehole |
title_full_unstemmed |
Lithostratigraphy determined from downhole logs in the AND-2A borehole |
title_sort |
lithostratigraphy determined from downhole logs in the and-2a borehole |
publisher |
PANGAEA |
publishDate |
2014 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.834632 https://doi.org/10.1594/PANGAEA.834632 |
op_coverage |
LATITUDE: -77.758141 * LONGITUDE: 165.276765 * DATE/TIME START: 2007-10-10T12:00:00 * DATE/TIME END: 2007-11-30T12:00:00 |
long_lat |
ENVELOPE(165.276765,165.276765,-77.758141,-77.758141) |
genre |
Antarc* Antarctic Magnetic susceptibility McMurdo Sound Sea ice |
genre_facet |
Antarc* Antarctic Magnetic susceptibility McMurdo Sound Sea ice |
op_source |
Supplement to: Hunze, Sabine; Schröder, Henning; Kuhn, Gerhard; Wonik, Thomas (2013): Lithostratigraphy determined from downhole logs in the AND-2A borehole, southern Victoria Land Basin, McMurdo Sound, Antarctica. Geosphere, 9(1), 63-73, https://doi.org/10.1130/GES00774.1 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.834632 https://doi.org/10.1594/PANGAEA.834632 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.83463210.1130/GES00774.1 |
_version_ |
1810486743406739456 |