This article describes a technology for creating 2D&3D models of the earth crust, which are fitted witheach other by the gravitational and magnetic fields. The main feature of the technology is the calculation of theSpearman’s rank correlation coefficient between the results of downward-continued gravitational & magnetic fields, and the following determination of the sub-horizontal gravitational-magnetic boundaries. The technology was applied to the construction of the density-magnetic models based on gravitational and magnetic fields for the oil & gas basins of Timan-Pechora and North Caucasus. The resulting models have been analyzed for the features of the areas structural and tectonic layout, as well asof the display of hydrocarbon deposits on both local and regional scales.