The eastern and western parts consist of two oldest Archean-Early Proterozoic stable land masses of China, whereas the central part is the Proterozoic land mass, which is rather active due to the compressive action of Qinghai-Tibet plateau.
The eastern and western parts consist of two oldest Archean-Early Proterozoic stable land masses of China, whereas the central part is the Proterozoic land mass, which is rather active due to the compressive action of Qinghai-Tibet plateau.
东、西部由中国最古老的2个太古代－早元古代稳定地块组成，而中部是元古代地块区，因受青藏高原的推挤，活动性较大。