Morphostructural and physical characteristics of magmatic formations within Yenisei-Khatanga trough: new results of geophysical data analysis

The authors present the results of geophysical data integrated analysis for the central part of the Yenisei-Khatanga Regional Trough, which was carried out during the course of building its three-dimensional density model. The focus is on important elements of the deep-seated architecture: volcanic sequences related to the geodynamic activation at the turn of Palaeozoic and Mesozoic eras. Data of regional 2D CDP and Magnetotelluric Sounding surveys are interpreted with a support of gravity and magnetic fields based zoning, 2D/3D geophysical inversion, and igneous complexes classification. New materials were obtained to update structural and tectonic models of the Yenisei-Khatanga Regional Trough, namely: areas of buried tuff basalt occurrence and a belt of flank intrusions localized according to depth and identified according to their composition in the sections created along the survey lines are delineated. The authors discuss possibilities of using the results of this analysis in prospecting for potential hydrocarbon traps associated with magmatic structures and as additional constraints on hypotheses on the stages of the Yenisei-Khatanga Regional Trough formation