小秦岭在中生代期间经历了强烈的构造活动变迁,区域构造体制由挤压向伸展过渡,并最终在伸展体制下于晚燕山期形成小秦岭变质核杂岩,其深部过程为中国东部大陆岩石圈拆沉作用而引起软流圈物质上涌。小秦岭是中国重要的金矿集中区,主要产出3种类型的金矿床,其空间分布规律和成矿时代特征表明,本区金的成矿作用奏始于碰撞造山作用的后期,主成矿期发生在造山作用期后以伸展体制为主导的晚燕山期。碰撞造山带在造山作用期后常常发育伸展构造,伸展体制下的变形变质演化和多源流体活动使大规模成矿作用成为可能。 During the Mesozoic period, the Xiaoqinling experienced a strong tectonic activity transition. The regional tectonic system was transitioned from extrusion to extension. Finally, a small Qinling metamorphic core complex was formed during the Late Yanshanian period. The deep process was the continental lithosphere in eastern China The role of demolition sink caused by asthenospheric material surge. Small Qinling is an important gold mining area in China and mainly produces 3 types of gold deposits. The spatial distribution and the characteristics of the metallogenic epoch indicate that the gold mineralization in this area began at the later stage of collision orogeny. The ore period occurred in the late Yanshan period after the orogenic period was dominated by the extension system. The orogenic orogenic belt often develops extensional structures after orogeny periods, and the metamorphism and metamorphism evolution under extensional regimes and multi-source fluid activities make it possible for large-scale mineralization.