Heat flux density, mantle structure and oil and gas potential of the Yamal Peninsula (Arctic)

Research subject. The Yamal Peninsula is of interest due to the fact that the concentration of hydrocarbon deposits per unit area is more than 100 times higher than the “world average”, which is confirmed by the reserves of the largest oil and gas fields already discovered. At the same time, the knowledge of the deep horizons of the earth’s crust and mantle within the Yamal and adjacent areas is clearly insufficient in comparison with more southern regions. Methods . In this work, the method of seismic tomography was used, which makes it possible to identify anomalies in the velocities of seismic waves directly related to the heat flow density and geodynamic activity of the subsurface. Conclusons . Apparently, the Western Yamal positive thermal anomaly indicates a region of a high geodynamic activity permeable for deep fluid-gas streams. The location of Yamal on a slightly raised shoulder of this anomalous region has determined the high oil and gas potential of this peninsula. Other regions situated in the vicinity of the discovered thermal anomaly may present significant research interest.