Preliminary investigation of the crustal structure of the Middle Urals by geomagnetic methods, based on the global model EMAG2

Abstract

Summary The EMAG2 database of lithospheric magnetic anomalies was used to construct a magnetic model of the earth’s crust within the Middle Urals and adjacent margins of the East European platform and the West Siberian plate on an area 800×500 km. The vertical component of the magnetic anomalies has been identified by an approximation method using the class of singular sources - magnetized rods. The data obtained make it possible to apply computational methods for harmonic functions. Studies of the structural features of the magnetic field have been carried out. Computer programs were used in which parallel computations were implemented. Anomalies from the granite and basalt layers of the earth’s crust were separated, for which the surfaces of magnetized sources were constructed using the method of local corrections. Within the granite layer, the magnetic model is built for a magnetization of 3 A/m. The sources of regional anomalies in the western part of the territory within the margin of the East European platform and the western slope of the Middle Urals have a high magnetization of about 6 A/m.