Gold quartz vein is the major orebody which is controlled by E-W-extrusion fracture zone in the Damiaozi gold mineralized district.The granite-porphyry,spessartite and diabase are the major wallrock.

大庙子金矿化区内金矿体以石英脉型为主,矿体的产出受东西向挤压破碎带控制,花岗斑岩和闪斜煌斑岩、辉绿岩是矿体的主要围岩。