Types of post-trappean hypabyssal granitoids of the Circum-Siberian belt

Early-Middle Triassic granitoid massifs form the Circum-Siberian belt, which is considered to be an outer zone of a large Siberian igneous province that is represented by Late Permian-Early Triassic basaltoids. Two major types of granitoids are distinguished: (1) granite and leucogranite; (2) mid-alkaline and alkaline granitoids. These massifs are unevenly located in individual segments of the belt. Emplacement of granitoids of the Circum-Siberian belt occurred at the final stages of the evolution of the Siberian plume. The main geochemical and isotope characteristics of granitoids are discussed.