Reduced to pole long-wavelength magnetic anomalies of Africa and Europe
To facilitate analysis of the tectonic framework for Africa, Europe and adjacent marine areas, MAGSAT scalar anomaly data are differentially reduced to the pole and compared to regional geologic information and geophysical data including surface free-air gravity anomaly data upward continued to sate...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19850023282 2023-05-15T16:50:06+02:00 Reduced to pole long-wavelength magnetic anomalies of Africa and Europe Olivier, R. Hinze, W. J. Vonfrese, R. R. B. Unclassified, Unlimited, Publicly available JAN 1, 1985 http://ntrs.nasa.gov/search.jsp?R=19850023282 unknown http://ntrs.nasa.gov/search.jsp?R=19850023282 Accession ID: 85N31595 No Copyright CASI 43 Improving the Geol. Interpretation of Magnetic and Gravity Satellite Anomalies; 1 p 1985 ftnasantrs 2012-02-15T16:09:55Z To facilitate analysis of the tectonic framework for Africa, Europe and adjacent marine areas, MAGSAT scalar anomaly data are differentially reduced to the pole and compared to regional geologic information and geophysical data including surface free-air gravity anomaly data upward continued to satellite elevation (350 km) on a spherical Earth. Comparative analysis shows magnetic anomalies correspond with both ancient as well as more recent Cenozoic structural features. Anomalies associated with ancient structures are primarily caused by intra-crustal lithologic variations such as the crustal disturbance associated with the Bangui anomaly in west-central Africa. Anomalies correlative with Cenozoic tectonic elements appear to be related to Curie isotherm perturbations. A possible example of the latter is the well-defined trend of magnetic minima that characterize the Alphine orogenic belt from the Atlas mountains to Eurasia. In contrast, a well-defined magnetic satellite minimum extends across the stable craton from Finland to the Ural mountains. Prominent magnetic maxima characterize the Arabian plate, Iceland, the Kursk region of the central Russian uplift, and generally the Precambrian shields of Africa. Other/Unknown Material Iceland NASA Technical Reports Server (NTRS) |
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43 |
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43 Olivier, R. Hinze, W. J. Vonfrese, R. R. B. Reduced to pole long-wavelength magnetic anomalies of Africa and Europe |
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43 |
description |
To facilitate analysis of the tectonic framework for Africa, Europe and adjacent marine areas, MAGSAT scalar anomaly data are differentially reduced to the pole and compared to regional geologic information and geophysical data including surface free-air gravity anomaly data upward continued to satellite elevation (350 km) on a spherical Earth. Comparative analysis shows magnetic anomalies correspond with both ancient as well as more recent Cenozoic structural features. Anomalies associated with ancient structures are primarily caused by intra-crustal lithologic variations such as the crustal disturbance associated with the Bangui anomaly in west-central Africa. Anomalies correlative with Cenozoic tectonic elements appear to be related to Curie isotherm perturbations. A possible example of the latter is the well-defined trend of magnetic minima that characterize the Alphine orogenic belt from the Atlas mountains to Eurasia. In contrast, a well-defined magnetic satellite minimum extends across the stable craton from Finland to the Ural mountains. Prominent magnetic maxima characterize the Arabian plate, Iceland, the Kursk region of the central Russian uplift, and generally the Precambrian shields of Africa. |
format |
Other/Unknown Material |
author |
Olivier, R. Hinze, W. J. Vonfrese, R. R. B. |
author_facet |
Olivier, R. Hinze, W. J. Vonfrese, R. R. B. |
author_sort |
Olivier, R. |
title |
Reduced to pole long-wavelength magnetic anomalies of Africa and Europe |
title_short |
Reduced to pole long-wavelength magnetic anomalies of Africa and Europe |
title_full |
Reduced to pole long-wavelength magnetic anomalies of Africa and Europe |
title_fullStr |
Reduced to pole long-wavelength magnetic anomalies of Africa and Europe |
title_full_unstemmed |
Reduced to pole long-wavelength magnetic anomalies of Africa and Europe |
title_sort |
reduced to pole long-wavelength magnetic anomalies of africa and europe |
publishDate |
1985 |
url |
http://ntrs.nasa.gov/search.jsp?R=19850023282 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
CASI |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19850023282 Accession ID: 85N31595 |
op_rights |
No Copyright |
_version_ |
1766040283916533760 |