中文摘要：

东秦岭-大别造山带是由中国华北、扬子两大板块俯冲碰撞而形成，其北缘的逆冲推覆构造带一直是国内外学者研究热点之一。豫西宜阳南部地区地处华北板块南缘，特殊的区域大地构造位置造成该地区经历了多期次构造运动，地质演化特征的双重性和构造的多期次性决定了豫西宜阳南部地区基础地质研究的必要性。通过野外地表地质调查和构造解析等方法，详细描述和分析了研究区构造的几何学特征，在此基础上恢复了其运动演化过程。研究结果表明：①豫西宜阳南部地区以褶皱、逆冲推覆构造为主。主要发育了李沟向斜、祖师庙-水河沟断层、陈宅-吕沟逆冲断层和兰家门逆冲断层。②中生代陆内构造演化分为以下4个阶段：印支期-早燕山期，华北板块和扬子板块的NS向碰撞挤压，发育了李沟向斜；中-晚燕山期，李沟向斜核部逐步发生伸展变形，发育了NW向正断层；燕山末期，随着北秦岭反向逆冲推覆带北向扩展，NW向陈宅-吕沟逆冲断层和兰家门逆冲断层依次发育，呈前展式叠瓦扇式逆冲；喜马拉雅期，以伸展走滑为主，发育了NNE向正断层。该研究能为秦岭-大别造山带对华北南缘的构造发育及演化过程的影响提供依据。

英文摘要：

The Eastern Qinling-Dabie orogenic belt was formed by the collision between the North China Block and the Yangtze Block in China. The overthrust structures on the northern part of the Eastern Qin-ling-Dabie orogenic belt has always been one of the research interests of domestic and foreign scholars. The southern Yiyang in western Henan is located on the southern margin of the North China Block, where multi-stage tectonic movements were caused by the special tectonic location. The duality of geological evolution structures and the multiphase tectonic activities determines the necessity of the fundamental geological research in Yiyang area. This paper describes and analyses the structure geometry of the study area based on the literature geological data and geological investigations and structural analysis in the field. In the meantime, its tectonic evolution is reconstructed. The study shows that： （1） The southern Yiyang in Western Henan is dominated by fold and thrust-nappe tectonics, including Ligou syncline, Zhushimiao- Shuihegou fault, Chenzhai-lvgou thrust fault and Lanjiamen thrust fault; （2） The Mesozoic intracontinental orogenic stage can be divided into the following four stages. In Indosinian-the early Yanshan orogenic event, controlled by NS compression of the North China Block and the Yangtze Block , Ligou syncline was developed; During the Mid-Late Yanshan period, extensional deformation was gradually occurred in the core of the syncline, and NW normal fault was developed. At the end of Yanshan stage, the reverse thrust belt of North Qinling extended northward, and the NW trending Chenzhai-Lvgou thrust fault and the Lanjiamen thrust fault were developed in order. In the Himalaya stage, the extension slip was dominated in this region and NNE trending faults were developed. The study for the Qinling-Dabie orogenic belt on the southern margin of North China provides the evidence for tectonic characteristics and evolution process.