Yanshanian acid is a mountain of granite, mostly granite and coarse-grained porphyritic granite. 山地属燕山期酸性花岗岩,多为粗粒花岗岩和斑状花岗岩。
The Anjiayingzi gold deposit is a middle size deposit occurring in North China plateform,hosted by porphyritic granite with Yenshenian age. 安家营子金矿床是华北地台内的一个中型矿床,产在燕山期的斑状花岗岩之中。