THE MAIN CHARACTERISTICS OF YALUJIANG FAULT ZONE AND ITS SINGNIFICANCE

The large-scale Yalujing fault zone, lying in Eastern Liaoning Province, is the secondary fault zone of the Tan-Lu fault zone on its east side, with multiple activities. The movements underwent four stages, namely, left-lateral shearing in Late Indosinian-Early Yanshanian epoch (T₃-J₁); low angle expanding-slipping and compressive reverse thrust in Middle Yanshanian epoch (J_2-3); left-lateral normal strike-slip faulting from Late Yanshanian (K,)to the end of Yanshanian (K₂); and right-lateral strike-lateral strike-slip faulting from the end of Yanshanian (K₂) to Early Himalayan epoch (N). The fault zone controls the distribution of the magmatic rocks, sedimentary basins and minerals. It also controls the intermediate-basic and acidic-intermediate volcanic rocks of Cretaceous. It is a deep fault that cut the sima. The lift-lateral transposition is up to 20 km, with the greatest vertical on both sides of the fault zone are comparable, which displacement of 4 km. The geological and structural characteristics is significantly important for the research in the region.