Possible Use of Satellite Geomagnetic Observations in Geological and Tectonic Studies of Lithosphere Structure

Abstract

Features that reflect parameters of the geological and tectonic structure in lithospheric magnetic anomalies obtained using measurements by the CHAMP Earth satellite. A database on full vector module Ta and vertical component Za of the lithosphere’s magnetic field at satellite altitudes is created using a original technology for separating an anomaly magnetic field from measurements made by the CHAMP satellite. The positions of large-scale anomalies over the territories of the eastern Carpathians, the Tarim large igneous province, the Khatanga trap plume and the Kolyma–Omolon microcontinent was determined. Data analysis on the magnetization of the lower crust structures in conjunction with other geophysical means allows us to identify conditions of the origin and evolution of the mantle and the mantle–crust ore-forming systems that result in the formation of large and unique ore deposits. It is shown that quantitative geological information can be derived from magnetic data by clarification of the boundaries position of Precambrian provinces covered by Phanerozoic sediments. As a parameter reflecting the actual positions of structures of the lower crust and their physical properties, the lithospheric magnetic field can be used to distinguish, contour and correct them in addition to other geological and geophysical means.