山西隆起区燕山期构造变形特征
刘康;魏荣珠;续世朝
【期刊名称】《中国地质调查》 【年(卷),期】2024(006)002
【摘要】During Yanshann movement period, the contractive structure deformation of the thrust fault and buckling folds formed as the basic structural elements is shown in Shanxi uplift area. Strata of different ages in this area have unique rock assemblage and physical properties, which may preserve and record deformation styles and characteristics at different levels of Yanshan structure. Through the study of surface geology, physiognomy and structure characteristics, we primarily concluded the \contractive deformation, and vertical stacking and thickening\was applied to quantitatively estimate the horizontal shortening and vertical thickening effect, which were caused by nearly E-W shrinkage deformation. The section restoration showed that, before and after deformation, the horizontal shortening of the uplift area was about 32.8％ in total. Cambrian bottom unconformity interface in the uplift area is about 5 km higher than that in Ordos Basin, due to vertical thickening. The intensive collision uplift and folding deformation resulted in the lateral shortening and vertical thickening in the upper part of the crust. Geological bodies are orderly vertically stacked and different levels of
山西隆起区燕山期构造变形特征
