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Reduced to pole long-wavelength magnetic anomalies of Africa and EuropeTo 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.
Document ID
19850023282
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Olivier, R.
(Lausanne Univ. West Lafayette, IN, United States)
Hinze, W. J.
(Purdue Univ. Columbus, United States)
Vonfrese, R. R. B.
(Ohio State Univ.)
Date Acquired
August 12, 2013
Publication Date
January 1, 1985
Publication Information
Publication: Improving the Geol. Interpretation of Magnetic and Gravity Satellite Anomalies
Subject Category
Earth Resources And Remote Sensing
Accession Number
85N31595
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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