The zimenqiao Formation silicolites of Lower Carboniferous is the country rock of Changkeng Au-Ag deposit. 下石炭统梓门桥组硅质岩是粤西长坑金银矿床的直接容矿岩石。
The Bitian ore deposit is a silver-dominant large-size copper-gold-silver deposit related to Late Yanshanian subvolcanic rocks. 碧田矿床是成因上与燕山晚期次火山岩有关的以银为主的大型铜金银矿床。