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本区位于秦岭东西向构造带的北部边缘。区内出露的主要地层为太古界太华群的一套深变质的沉积—火山岩系(包括混合岩),在区域南部尚有部分震旦系地层出露。太华群地层主要由黑云斜长(角闪)片麻岩组成,其中夹有斜长角闪岩及磁铁石英岩的小透镜体,底部偶见大理岩及石英岩夹层。区内伟晶岩、辉绿岩普遍发育。
The area is located on the northern margin of the Qinling east-west tectonic belt. The main strata exposed in the area are a set of deep metamorphic sediments of the Taihuakai Taihua Group - volcanic rocks (including mixed rocks), and some Sinian strata are still exposed in the southern part of the area. The Taihuazhan Formation consists mainly of biotite diagonal gneiss (glitter) gneiss, in which lenslets of amphibolite and magnetite quartzite are sandwiched and intercalation of marble and quartzite occurs occasionally. Pegmatite, diabase generally develop.