Sedimentogenic Aspect of Evolution and Hydrocarbon Potential of the Aldan-Maya Sedimentary Basin (Southeast of the North-Asian Craton)

Resumo

The main features of the lithofacial conditions of formation of the sedimentary complex of the Aldan–Maya Sedimentation Basin (AMSB) are discussed. It is shown that different facies (continental, coastal–marine, and marine) were formed under the conditions of one sedimentation basin of the type of one-side syneclise, which was formed on the eastern slope of the Aldan anteclise of the North Asian Craton, at its contact with the Okhotsk Massif. We distinguish and characterize the main sedimentation stages separated by inversions, magmatic layers, and weathering crusts (from the bottom upward): Pre-Riphean (Late Karelian, Ulkanian); Early Riphean (Uyan–Uchur); Middle–Late Riphean (Kerpyl–Lakhanda–Uisk); and Vendian–Cambrian. Areas of bituminous lithocomplexes are revealed in the sedimentary cover of the AMSB. Structural and sedimentary events in the AMSB are related to the geodynamics of the southeastern zone of the North Asian Craton and to the hydrodynamic regime of the Okhotsk–Pacific sector of the World Ocean. The article is devoted to the problems of comprehensive study of the geology, deep structure, and geodynamics and evaluation of hydrocarbon potential of the AMSB.