Structural Style And Tectonic Evolution In Mountain Setten From Late Paleozoic To Mesozoic

Mountain Setten is located in the west segment of the Yinshan-Yanshan belt in the northern North China Craton.There are abundant geological records from late Archean to Mesozoic.There are still obvious divergences about the structural style of the region since the Paleozoic,and the study of the regional structural evolution process during this period is relatively weak,so the influence of the paleo Asian Ocean structural evolution and the orogeny of the Central Asia orogenic belt on the region in the northern adjacent area is also unclear.In this paper,a relatively complete stratigraphic record area in the south of mountain Setten is selected to study the late Paleozoic and Mesozoic structural deformation and its structural evolution process,and then to explore the impact of the closing process of the paleo Asian Ocean on the structural deformation in North China.we selected southern Mountain Setten as research area and figure its Structural style and tectonic evolution from late Paleozoic to Mesozoic.This study collected geo-data in area covered by three SN trending sections-west,mid and east section,combined with previous studies and analysis of geo-data,explored structural style,tectonic evolution and tectonic kinematic character in Mountain Setten from late Paleozoic to Mesozoic.Based on previous geoscience data and our observation in the field,we find there mainly are NWW trending thrust fault structure.And we identified three deformation?D1-D3?:phase??P₃-T?,represented by NWW trending contraction deformation;phase??J₃-K₁?,represented by NWW trending folds;phase??K₂?,represented by NWW trending strike-slip faults.Based on Structural style and tectonic evolution of the study area,we find that in late Paleozoic to Mesozoic,the contraction of paleo-Asian Ocean formed NE-SW tectonic stress.