Geophysical characteristics of geotectonic rock complexes of the northern Urals

Petrophysical characteristics of geological bodies at the present stage of geological knowledge is considered as a «record» of the geodynamic conditions of the past and used for the development of new or refining existing models of structure and evolution of the lithosphere. The objects of this study were igneous, metamorphic and sedimentary-volcanogenic rock complexes of different age in the north of the Urals. A comparative analysis of geophysical, petrophysical, geological and geochronological data was used for detailed petrophysical systematization of structural-material complexes of the Earth's crust and upper mantle in the north of the Urals. It is proposed to differentiate the three regional petrophysical zones within the northern part of the Urals according to the petrophysical properties of rocks and characteristics of the gravitational and magnetic fields as a result of comprehensive interpretation of physical fields. Petrophysical zone of «paleocontinental» type, combines petrophysical group of formations represented by the pre-Riphean metamorphic associations. The «paleooceanic» petrophysical zone includes ultramafic rocks of ophiolite complexes and mafic rocks of Kershor and Lagorta associations. The most eastern zone of «paleo-island-arc» type consists of intrusive rocks of Sobskiy and Kongorskiy complexes, as well as volcano-sedimentary sequence.