Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2018, Vol. 15, No. 3, pp. 80-87
Depths of anomalous magnetic field sources based on ground and balloon magnetic data
Yu.P. Tsvetkov
1 , K.V. Novikov
2 , A.A. Ivanov
3 , S.V. Filippov
1 , O.M. Brekhov
4 , T.N. Bondar
1 1 Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation RAS, Troitsk, Moscow, Russia
2 Hydrospetsgeology, Moscow, Russia
3 Sergo Ordzhonikidzе Russian State Geological Prospecting University (MGRI-RSGPU), Moscow, Russia
4 Moscow Aviation Institute, Moscow, Russia
Accepted: 04.05.2018
DOI: 10.21046/2070-7401-2018-15-3-80-87
We consider the method of determination of the Curie isotherm depth from the geomagnetic field data. The Curie isotherm depth is assumed to coincide with the bottom of the layer containing the anomalous (lithospheric) geomagnetic field sources. The method is based on the Fourier analysis of different types of experimental data on a geomagnetic profile. We used aeromagnetic observations of the geomagnetic field module at near-surface altitudes and balloon measurements of gradient of the geomagnetic field module at the altitudes of 20–40 km. The top and weight center depths of the magnetoactive layer were calculated from the aeromagnetic and balloon data respectively. From the obtained depths we estimated the bottom of the magnetoactive layer corresponding to the Curie isotherm depth. The novelty and advantages of the suggested approach are in usage of balloon data containing the fields of deep magnetic sources that allow us to determine their depths more precisely comparing with analysis of only aeromagnetic data.
Keywords: anomalous magnetic field of the Earth, balloon magnetic surveys, depths of anomalous magnetic field sources
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