Arctic quasi-elliptical plume-asthenospheric geomorphological structures and forecast of hydrocarbon-prospective zones formed by them

The aim of the work is to present the results of the forecast of the UV-promising quasi-elliptical pre-Paleozoic plume-asthenospheric geomorphological structures in the western sector of the Russian Arctic. The subject of the study is digital data of satellite and deep geophysical parameters, such as magnetic anomalies, heat flow, and geomorphological features of the crust and lithosphere. The data of geophysical maps of the thickness of the crust, lithosphere, sedimentary layer, and heat flow have been digitized within the location of 45 identified quasi-elliptical pre-Paleozoic plume-asthenospheric geomorphological structures of the western sector of the Russian Arctic. Stochastic methods were used to determine the most promising structures. Histograms are calculated, distribution densities are determined according to the Kolmogorov criterion, probabilities for different types of crust, lithosphere located under the continental slope, shelf, lowlands, platforms. The analysis showed that the data on the sedimentary layer thickness, the thickness of the crust, lithosphere, and heat flow correspond to the Gauss distribution. The main conclusions of the study are that, according to anomalies of thermal, magnetic fields, and seismic surveys measured in the western sector of the Russian Arctic, quasi-elliptical pre-Paleozoic plume-asthenospheric geomorphological structures with a diameter of 100-300 kilometers were identified for the first time. New patterns have been established showing that hydrocarbon deposits (Prirazlomnoye-Shtokmanovskoye, Admiralteyskoye-Andreevskoye), which are part of quasi-elliptical pre-Paleozoic plume-asthenospheric geomorphological structures, in the western sector of the Russian Arctic are also located along linear zones connected to two (SE-NW, SW-SW) tectonic fault systems.The scope of application of the results obtained lies in the fact that the studies carried out made it possible to predict oil and gas prospects, to outline the sequence of geological exploration within the quasi-elliptical pre-Paleozoic plume-asthenospheric geomorphological structures in the waters of the western sector of the Russian Arctic.