Geology of Precambrian complexes of the North Yenisei Ridge. P.S. Kozlov, I.I. Likhanov

This monograph is devoted to the study of the evolutionary features of the Precambrian complexes of the North Yenisei Ridge. The paper analyzes the relationships between magmatism and metamorphism and tectonics, their causes, and determining factors. A wide range of modern geological mapping, petrological-geochemical, and isotope-geochronological research methods, including thermomechanical numerical modeling, were used in the study of the objects. The specifics of tectonic-thermal processes in complexes with a polycyclic history, where different types of metamorphism combine in contrasting geodynamic settings, were analyzed using the reconstruction of P-T-t trends in rock evolution. This book discusses these issues using examples of regional low-pressure/high-temperature metamorphism, granulite metamorphism, moderate-pressure/high-temperature and high-pressure/low-temperature collisional metamorphism associated with thrusting and subduction, and stress metamorphism during rock deformation. Igneous complexes of various geodynamic origins are studied, including manifestations of intraplate magmatism in lithospheric extension settings. The geodynamic history of the region is compared with the synchronous sequence and similar style of tectonic-thermal events along the periphery of the large Precambrian cratons of Laurentia and Baltica over a wide time range (1.4-0.54 Ga), which is consistent with modern paleocontinental reconstructions of the Siberian craton as part of the supercontinent Rodinia. Mapping results and lithogenesis and petrogenesis features of high-alumina metapelite metamorphic complexes in the North Yenisei Ridge allowed us to characterize deposits and ore occurrences of sillimanite-group minerals and explore the potential for developing industrial alumina, silumin, and aluminum production based on their combined use with other aluminous rocks and ores in the region.

This work is intended for survey geologists and specialists in petrology, tectonics, geodynamics, and metallogeny.