一、前言我系承担了由国家计委地质局下达的“东秦岭(主要是陕西境内)区域成矿条件及找矿方向”的研究项目(项目编号:基3—4)中“东秦岭构造体系与成矿关系”的研究任务。该任务从一九七三年开始,一九七五年结束,共三年完成。预期提交东秦岭构造体系图及构造体系与成矿关系的总结。根据设计任务,我系东秦岭构造体系研究组教师和工农兵学员共三十余人次,三年 I. Preface I was responsible for the research project (project number: 3-4) in the “East Qinling (mainly in Shaanxi Province) regional metallogenic conditions and prospecting direction” issued by the State Planning Commission Geological Bureau. System and mineralization "research mission. The task started in 1973 and ended in 1975 and completed in three years. It is expected that a summary of the East Qinling tectonic system map and its relationship with the metallogenic system will be submitted. According to the design task, I was the East Qinling Tectonic System Research Group teachers and workers and peasants and soldiers a total of more than 30 people, three years