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兰家金矿是吉林省大黑山条垒多金属成矿带中的一个矽卡岩型金矿,矿床受北北东向张性断裂控制,矿体产于下二叠统范家屯组大理岩与晚三叠世石英闪长岩接触带中及接触带外带大理岩与角岩分界面中。金矿体形成于矽卡岩晚期热液蚀变阶段,主要赋存于阳起石或纤闪石矽卡岩中。金与铋关系密切。
The Lanjia gold deposit is a skarn-type gold deposit in the Barrier Polymetallic Metallogenic Belt of the Daheishan Mountains, Jilin Province. The ore deposit is controlled by the North-East trending Zhangjiakou fault. The ore body is produced in the marble of the Lower Triassic Fanjiadun Formation Late Triassic quartz diorite contact zone and contact zone outcrop marble and horn rock interface. The gold ore body is formed in the late hydrothermal alteration stage of skarn, which mainly occurs in Yangding stone or amphibole skarn. Gold and bismuth are closely related.