Geotechnical properties of Antarctic deep sea sediments
Sedimentological and geotechnical analyses were carried out on two undisturbed large diameter deep sea cores from the Antarctic sector of the Atlantic ocean. One core, from a silled basin within the Bransfield Strait is characterized by fine grained hemipelagic material and turbidite layers. The oth...
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ftoceanrep:oai:oceanrep.geomar.de:56726 2023-05-15T14:10:07+02:00 Geotechnical properties of Antarctic deep sea sediments Holler, Peter 1985-12 text https://oceanrep.geomar.de/id/eprint/56726/ https://oceanrep.geomar.de/id/eprint/56726/1/Holler_P_1985_C.pdf en eng Bornträger https://oceanrep.geomar.de/id/eprint/56726/1/Holler_P_1985_C.pdf Holler, P. (1985) Geotechnical properties of Antarctic deep sea sediments. Meteor Forschungsergebnisse: Reihe C, Geologie und Geophysik, 39 . pp. 23-36. info:eu-repo/semantics/restrictedAccess Article PeerReviewed 1985 ftoceanrep 2023-04-07T16:03:51Z Sedimentological and geotechnical analyses were carried out on two undisturbed large diameter deep sea cores from the Antarctic sector of the Atlantic ocean. One core, from a silled basin within the Bransfield Strait is characterized by fine grained hemipelagic material and turbidite layers. The other core, from the continental slope of the Weddell Sea represents a typical glacial marine environment. The variations of physical properties as related to both an increasing overburden pressure (or depth below top of core) and/or to lithological changes are discussed. With increasing overburden pressure only small variations of physical properties were observed. In core 14882-2 the porosity decreases 0.7% per meter, the natural water content 6% per meter. The wet bulk density and the shear strength increase with rates of 0.015 g/cm3 and 0.5 KPa per meter. Compared to small variations in consolidation, the changes of the lithology cause more extreme variations of physical properties: e.g. decreases the natural water content by 100%, the porosity by 14%, and the wet bulk density increases by 0.23 g/cm3 due to a turbidite layer in the core from the Bransfield Strait (core 14882-2). In the core from the continental slope of the Weddell Sea (core 14875-1) two major unconformities have been detected. The ice-rafted debris of this core causes a generally lower porosity (64%), a lower natural water content (75%), a higher wet bulk density (1.55 g/cm3) and specific grain density (2.62 g/cm3), compared to the core from the Bransfield Strait (porosity 77% , natural water content 151% , wet bulk density 1.34 g/cm3, specific grain density 2.47 g/cm3). Article in Journal/Newspaper Antarc* Antarctic Bransfield Strait Weddell Sea OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Bransfield Strait The Antarctic Weddell Weddell Sea |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Sedimentological and geotechnical analyses were carried out on two undisturbed large diameter deep sea cores from the Antarctic sector of the Atlantic ocean. One core, from a silled basin within the Bransfield Strait is characterized by fine grained hemipelagic material and turbidite layers. The other core, from the continental slope of the Weddell Sea represents a typical glacial marine environment. The variations of physical properties as related to both an increasing overburden pressure (or depth below top of core) and/or to lithological changes are discussed. With increasing overburden pressure only small variations of physical properties were observed. In core 14882-2 the porosity decreases 0.7% per meter, the natural water content 6% per meter. The wet bulk density and the shear strength increase with rates of 0.015 g/cm3 and 0.5 KPa per meter. Compared to small variations in consolidation, the changes of the lithology cause more extreme variations of physical properties: e.g. decreases the natural water content by 100%, the porosity by 14%, and the wet bulk density increases by 0.23 g/cm3 due to a turbidite layer in the core from the Bransfield Strait (core 14882-2). In the core from the continental slope of the Weddell Sea (core 14875-1) two major unconformities have been detected. The ice-rafted debris of this core causes a generally lower porosity (64%), a lower natural water content (75%), a higher wet bulk density (1.55 g/cm3) and specific grain density (2.62 g/cm3), compared to the core from the Bransfield Strait (porosity 77% , natural water content 151% , wet bulk density 1.34 g/cm3, specific grain density 2.47 g/cm3). |
format |
Article in Journal/Newspaper |
author |
Holler, Peter |
spellingShingle |
Holler, Peter Geotechnical properties of Antarctic deep sea sediments |
author_facet |
Holler, Peter |
author_sort |
Holler, Peter |
title |
Geotechnical properties of Antarctic deep sea sediments |
title_short |
Geotechnical properties of Antarctic deep sea sediments |
title_full |
Geotechnical properties of Antarctic deep sea sediments |
title_fullStr |
Geotechnical properties of Antarctic deep sea sediments |
title_full_unstemmed |
Geotechnical properties of Antarctic deep sea sediments |
title_sort |
geotechnical properties of antarctic deep sea sediments |
publisher |
Bornträger |
publishDate |
1985 |
url |
https://oceanrep.geomar.de/id/eprint/56726/ https://oceanrep.geomar.de/id/eprint/56726/1/Holler_P_1985_C.pdf |
geographic |
Antarctic Bransfield Strait The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Bransfield Strait The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Bransfield Strait Weddell Sea |
genre_facet |
Antarc* Antarctic Bransfield Strait Weddell Sea |
op_relation |
https://oceanrep.geomar.de/id/eprint/56726/1/Holler_P_1985_C.pdf Holler, P. (1985) Geotechnical properties of Antarctic deep sea sediments. Meteor Forschungsergebnisse: Reihe C, Geologie und Geophysik, 39 . pp. 23-36. |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1766282160927408128 |