Modeling of Salt Tectogenesis in Connection With the Choice of the Main Directions for the Search For Hydrocarbon Deposits and Hydromineral Raw Materials Within the Kempendyai Depression (South-East оf the Siberian Platform)

Abstract

A brief description of the geological structure of the sedimentary cover within the Kempendyai depression is given, in which two intervals of formation of unstable layers in the Cambrian and Devonian are distinguished, and their salt saturation is estimated. A generalized geo-density model of the sedimentary cover has been compiled, and approximate scales and duration of interruptions in the Phanerozoic sedimentation history are given. Numerical modeling of salt tectogenesis is performed by solving the problem of calculating the creeping flow of a Newtonian fluid with variable density and constant viscosity. The leading role of the surfacing of Devonian salts, the most active phase of which occurred in the Jurassic period, in the formation of local sedimentary cover structures with the subordinate nature of the dynamics of Cambrian salts is shown. It is proposed to identify subcortical zones composed of Devonian diapir salts as the most promising areas in terms of oil and gas content, and possibly in terms of lithium-bearing brines.

Keywords

• kempendyai depression
• salt tectogenesis
• numerical modeling
• cambrian
• devonian
• oil and gas prospects
• lithiumbearing brines