华北地台南缘豫西和陕东地区自西至东分布着彼此不相连接的小秦岭、崤山、熊耳山和鲁山等结晶基底——太华群,空间上呈弧形分布,大多以断块或穹隆的形式出露于中元古代熊耳群(Pt_2~1)之中。长期以来太华群被划归为晚太古代,它普遍受到多期构造作用、变质作用和混合岩化花岗岩化作用,并分布着许多大、中、小型金矿床。1982年以来我们对这一地 In the western margin of the North China Platform, the crystalline basement-Taihua Group, such as Xiaoqinling, Jieshan, Xiongershan and Lushan, which are not connected with each other, are distributed from west to east in the western part of the southern margin of North China Platform. Fault blocks or domes are exposed in the Proterozoic bear ear group (Pt_2 ~ 1). For a long time, Taihua Group has been classified as Late Archean, and it is generally subjected to multi-stage tectonism, metamorphism and migmatization granitization, and many large, medium and small gold deposits are distributed. We have been here since 1982