GEOPHYSICAL RESEARCH2018, vol. 19, no. 4, pp. 31-45.

UDC 550.34.09

Abstract  References   Full text (in Russian)


D.Y. Abramova(1), L.M. Abramova(2), Iv.M. Varentsov(2), S.V. Philippov(1)

(1) Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation of the Russian Academy of Sciences, Moscow, Troitsk, Russia

(2) Geoelectromagnetic Research Centre, Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Troitsk, Russia

Abstract. The distribution of the anomalous magnetic field is considered for the Baikal Rift Zone (BRZ) region and adjacent territories at two observation altitudes of 290 and 4 km. A database of experimental data of the absolute vector of the lithospheric magnetic field is created. Using the specially developed technology, the anomalous parts of the field are extracted from the CHAMP satellite records. To analyze the behavior of the anomalous field at an altitude of 4 km above the geoid, the EMAG2 version compiled from ground, satellite, marine, and aeromagnetic observations was used. Maps of anomalous field of various scales and averaging degrees were constructed, the position of individual anomalies and their relation to geological-tectonic and geophysical features of the structure of the Baikal rift zone and Mongolia was investigated. A good consistency of the anomalous magnetic field of the lithosphere and seismic tomography data is noted.

Keywords: regional geomagnetic anomalies, satellite measurements, EMAG2 database, Baikal rift zone, asthenospheric offset plumes.


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