Lithology and chronology of ice-sheet fluctuations (magnetic susceptibility of cores from the western Ross Sea)
The goals of the marine geology part of WAIS include reconstructing the chronology and areal extent of ice-sheet fluctuations and understanding the climatic and oceanographic influences on ice-sheet history. As an initial step toward attaining these goals, down-core volume magnetic susceptibility (M...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19930022691 2023-05-15T16:40:03+02:00 Lithology and chronology of ice-sheet fluctuations (magnetic susceptibility of cores from the western Ross Sea) Jennings, Anne E. Unclassified, Unlimited, Publicly available Jul 1, 1993 http://ntrs.nasa.gov/search.jsp?R=19930022691 unknown http://ntrs.nasa.gov/search.jsp?R=19930022691 Accession ID: 93N31880 No Copyright Other Sources 46 NASA. Goddard Space Flight Center, The First Annual West Antarctic Ice Sheet (WAIS) Science Workshop; p 4 1993 ftnasantrs 2012-02-15T19:56:21Z The goals of the marine geology part of WAIS include reconstructing the chronology and areal extent of ice-sheet fluctuations and understanding the climatic and oceanographic influences on ice-sheet history. As an initial step toward attaining these goals, down-core volume magnetic susceptibility (MS) logs of piston cores from three N-S transects in the western Ross Sea are compared. The core transects are within separate petrographic provinces based on analyses of till composition. The provinces are thought to reflect the previous locations of ice streams on the shelf during the last glaciation. Magnetic susceptibility is a function of magnetic mineral composition, sediment texture, and sediment density. It is applied in the western Ross Sea for two purposes: (1) to determine whether MS data differentiates the three transects (i.e., flow lines), and thus can be used to make paleodrainage reconstructions of the late Wisconsinan ice sheet; and (2) to determine whether the MS data can aid in distinguishing basal till diamictons from diamictons of glacial-marine origin and thus, aid paleoenvironmental interpretations. A comparison of the combined data of cores in each transect is presented. Other/Unknown Material Ice Sheet Ross Sea NASA Technical Reports Server (NTRS) Ross Sea |
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NASA Technical Reports Server (NTRS) |
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unknown |
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46 |
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46 Jennings, Anne E. Lithology and chronology of ice-sheet fluctuations (magnetic susceptibility of cores from the western Ross Sea) |
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46 |
description |
The goals of the marine geology part of WAIS include reconstructing the chronology and areal extent of ice-sheet fluctuations and understanding the climatic and oceanographic influences on ice-sheet history. As an initial step toward attaining these goals, down-core volume magnetic susceptibility (MS) logs of piston cores from three N-S transects in the western Ross Sea are compared. The core transects are within separate petrographic provinces based on analyses of till composition. The provinces are thought to reflect the previous locations of ice streams on the shelf during the last glaciation. Magnetic susceptibility is a function of magnetic mineral composition, sediment texture, and sediment density. It is applied in the western Ross Sea for two purposes: (1) to determine whether MS data differentiates the three transects (i.e., flow lines), and thus can be used to make paleodrainage reconstructions of the late Wisconsinan ice sheet; and (2) to determine whether the MS data can aid in distinguishing basal till diamictons from diamictons of glacial-marine origin and thus, aid paleoenvironmental interpretations. A comparison of the combined data of cores in each transect is presented. |
format |
Other/Unknown Material |
author |
Jennings, Anne E. |
author_facet |
Jennings, Anne E. |
author_sort |
Jennings, Anne E. |
title |
Lithology and chronology of ice-sheet fluctuations (magnetic susceptibility of cores from the western Ross Sea) |
title_short |
Lithology and chronology of ice-sheet fluctuations (magnetic susceptibility of cores from the western Ross Sea) |
title_full |
Lithology and chronology of ice-sheet fluctuations (magnetic susceptibility of cores from the western Ross Sea) |
title_fullStr |
Lithology and chronology of ice-sheet fluctuations (magnetic susceptibility of cores from the western Ross Sea) |
title_full_unstemmed |
Lithology and chronology of ice-sheet fluctuations (magnetic susceptibility of cores from the western Ross Sea) |
title_sort |
lithology and chronology of ice-sheet fluctuations (magnetic susceptibility of cores from the western ross sea) |
publishDate |
1993 |
url |
http://ntrs.nasa.gov/search.jsp?R=19930022691 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Ross Sea |
geographic_facet |
Ross Sea |
genre |
Ice Sheet Ross Sea |
genre_facet |
Ice Sheet Ross Sea |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19930022691 Accession ID: 93N31880 |
op_rights |
No Copyright |
_version_ |
1766030401152745472 |