北金山金矿区出露地层主要有下古生界碧口群和古生界中泥盆统三河口组，其中，中泥盆统三河口组是主要的赋矿地层，与金矿关系密切。矿区断裂发育，主要有NEE、NWW和NE向3组，其中NEE向断裂控制了金矿体的产出，为主要的控矿构造。矿区岩浆活动较弱，仅见岩脉零星出露。矿区内1∶5万金、银、铜、铅、锌、砷和锑异常发育。矿区围岩蚀变主要有硅化、绢云母化和黄铁矿化，与金矿化关系密切。通过对北金山金矿地质特征和控矿因素进行系统分析，认为北金山金矿区成矿地质条件有利，具有一定的找矿前景。

The outcropping strata of Beijinshan gold mine are mainly the Lower Paleozoic Bikou Group and the Middle Devonian Sanhekou Group.Among them，the Sanhekou Group is the main ore formation and closely retated to the gold mineralization.In mining，faults are developed which mainly have three groups of NEE，NWW and NE.NEE trending faults control the output of gold mine bodys，and also is the main ore-controlling structure.The magmatic activity in mining is weak，that only see the veins outcrop sporadically.It is abnormal development for gold，silver，copper，lead，zinc，arsenic and antimony in the gold mine.The rock alteration which have a closely related with gold mineralization mainly are silicification，sericite and pyrite，silicification，sericite and pyrite.Based on the systems analysis of geological characteristics and ore-controlling factors of the Beijinshan gold mine，it is considered to have a favorable geological condition and have a certain ore prospects，which provide a scientific basis for further exploration.