徐州新山构造特征及成因分析

摘要

The Xinshan area is located in the northern suburbs, Xuzhou City, middle frontal zone of Xuzhou-Suzhou thin-skinned thrusting system and the turning position of NNE and NE structures. According to study area field actual observations combined with re⁃gional geological data structural features and genetic analysis have considered that during the late Indo-Chinese epoch and early Yan⁃shanian epoch, the Pacific plate subducted under the North China plate and formed NE Xinshan thrust, overturned fold and interlayer fold assemblage, while the interlayer fold was formed under strong compressions, and the thrust caused dextral shear between overlying and underlying strata.%新山位于徐州市北郊，地处徐-宿薄皮型逆冲系统的中部锋带，NNE与NE向构造转折部。基于研究区野外实际观测，结合区域地质资料分析其构造特征及成因，认为印支末期至燕山早期太平洋板块向华北板块俯冲形成新山NE向逆冲断层、倒转褶皱与层间褶皱的组合，而层间褶皱则形成于强烈挤压背景下逆冲断裂导致地层间的右旋剪切。