Lithospheric Magnetic Anomalies of the Eastern Part of the Arctic Ocean as Images of Tectonic Structures

Geomagnetic data measured by the CHAMP satellite have been used to construct the spatial distribution of the lithospheric magnetic anomaly field in the region where the most significant tectonic structures of the eastern Arctic Ocean are located. A database of the anomaly lithospheric magnetic field...

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Bibliographic Details
Published in:Izvestiya. Atmospheric and oceanic physics 2021-12, Vol.57 (9), p.1021-1028
Main Authors: Abramova, D. Yu, Philippov, S. V., Abramova, L. M.
Format: Article
Language:English
Subjects:
Climatology
Continental crust
Crustal structure
Distribution
Earth and Environmental Science
Earth crust
Earth Sciences
Electrojets
Geology
Geomagnetic data
Geophysical exploration
Geophysical methods
Geophysical studies
Geophysics/Geodesy
Lithosphere
Magnetic anomalies
Magnetic field
Magnetic fields
Oceans
Parameters
Physical properties
Polar environments
Ridges
Satellite observation
Satellites
Spatial distribution
Structures
Tectonics
Territory
Use of Space Information about the Earth Studying Catastrophic Natural Processes from Space
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Summary:Geomagnetic data measured by the CHAMP satellite have been used to construct the spatial distribution of the lithospheric magnetic anomaly field in the region where the most significant tectonic structures of the eastern Arctic Ocean are located. A database of the anomaly lithospheric magnetic field parameters at ~280 km altitude of observation by the CHAMP satellite was compiled for the last six months of its operation, taking into account the distortions of the magnetic fields due to the influence of the polar electrojet. The maps of the modulus of the total anomaly magnetic field vector T a of various scales and degrees of averaging are constructed and presented for the studied territory. The spatial distribution and the possible geological and physical nature of the anomalies, being images of the most significant geological–tectonic structures of the eastern Arctic Ocean, are analyzed. The estimates of the parameters of the magnetic anomalies that are topographically confined to the Mendeleev and Alpha Ridges, as well as to the Chukchi Plateau (Cap), indicate the unity and correlation of these structures and confirm the evidence of continental crust under the Mendeleev Ridge from the results of the previous geological and geophysical studies. The anomalies of the lithospheric magnetic field observed over the eastern part of the Arctic Ocean reflect the current position and physical properties of the tectonic structures and are quite consistent with the current ideas on the Earth’s crust structure in this region; thus, they can be successfully analyzed together with data from other geophysical methods for further research. The prospects of use of satellite observations of the magnetic field for studying the regional tectonics and mapping of deep lithosphere heterogeneities of the hard-to-reach territories is shown.
ISSN:0001-4338
1555-628X
DOI:10.1134/S0001433821090371