Magsat magnetic anomaly contrast across Labrador Sea passive margins
Many passive margins not complicated by nearby anomalous crustal structure have satellite elevation crustal magnetic anomaly contrasts across them that are recognizable in reduced-to-pole versions of the Magsat and POGO data. In the Labrador Sea region this contrast is particularly well developed wi...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19910067154 2023-05-15T15:35:03+02:00 Magsat magnetic anomaly contrast across Labrador Sea passive margins Bradley, Lauren M. Frey, Herbert Unclassified, Unlimited, Publicly available Sep 10, 1991 http://ntrs.nasa.gov/search.jsp?R=19910067154 unknown http://ntrs.nasa.gov/search.jsp?R=19910067154 Accession ID: 91A51777 Copyright Other Sources 46 Journal of Geophysical Research; 96; 16 1991 ftnasantrs 2012-02-15T19:06:27Z Many passive margins not complicated by nearby anomalous crustal structure have satellite elevation crustal magnetic anomaly contrasts across them that are recognizable in reduced-to-pole versions of the Magsat and POGO data. In the Labrador Sea region this contrast is particularly well developed with strong positive anomalies overlying the continental crust of Greenland and eastern Canada and prominent negative anomalies situated over the Labrador Sea and Baffin Bay. In this work, forward modeling of the large-scale crustal bodies in this region (continental, oceanic, passive margin, several anomalous structures) was used to show that the Magsat anomaly contrast is due simply to the change in crustal susceptibility and thickness at the continental/oceanic crustal transition. Because the thickness varies more than the average susceptibility from continental to oceanic crust, the strong anomaly contrast is essentially an edge effect due mostly to the change in crustal structure. Other/Unknown Material Baffin Bay Baffin Bay Baffin Greenland Labrador Sea NASA Technical Reports Server (NTRS) Baffin Bay Canada Greenland |
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NASA Technical Reports Server (NTRS) |
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ftnasantrs |
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46 |
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46 Bradley, Lauren M. Frey, Herbert Magsat magnetic anomaly contrast across Labrador Sea passive margins |
topic_facet |
46 |
description |
Many passive margins not complicated by nearby anomalous crustal structure have satellite elevation crustal magnetic anomaly contrasts across them that are recognizable in reduced-to-pole versions of the Magsat and POGO data. In the Labrador Sea region this contrast is particularly well developed with strong positive anomalies overlying the continental crust of Greenland and eastern Canada and prominent negative anomalies situated over the Labrador Sea and Baffin Bay. In this work, forward modeling of the large-scale crustal bodies in this region (continental, oceanic, passive margin, several anomalous structures) was used to show that the Magsat anomaly contrast is due simply to the change in crustal susceptibility and thickness at the continental/oceanic crustal transition. Because the thickness varies more than the average susceptibility from continental to oceanic crust, the strong anomaly contrast is essentially an edge effect due mostly to the change in crustal structure. |
format |
Other/Unknown Material |
author |
Bradley, Lauren M. Frey, Herbert |
author_facet |
Bradley, Lauren M. Frey, Herbert |
author_sort |
Bradley, Lauren M. |
title |
Magsat magnetic anomaly contrast across Labrador Sea passive margins |
title_short |
Magsat magnetic anomaly contrast across Labrador Sea passive margins |
title_full |
Magsat magnetic anomaly contrast across Labrador Sea passive margins |
title_fullStr |
Magsat magnetic anomaly contrast across Labrador Sea passive margins |
title_full_unstemmed |
Magsat magnetic anomaly contrast across Labrador Sea passive margins |
title_sort |
magsat magnetic anomaly contrast across labrador sea passive margins |
publishDate |
1991 |
url |
http://ntrs.nasa.gov/search.jsp?R=19910067154 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Baffin Bay Canada Greenland |
geographic_facet |
Baffin Bay Canada Greenland |
genre |
Baffin Bay Baffin Bay Baffin Greenland Labrador Sea |
genre_facet |
Baffin Bay Baffin Bay Baffin Greenland Labrador Sea |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19910067154 Accession ID: 91A51777 |
op_rights |
Copyright |
_version_ |
1766365351479607296 |