摘要
乌拉山金矿主要赋存在太古宙乌拉山群变质地层中，不同类型矿脉的空间分布与华力西－印支期的大桦背花岗岩有密切的联系。Ａｕ、Ａｇ、Ｗ等组分的正异常和Ｂａ、Ｓｒ、Ｎａ＿２Ｏ等组分的负异常的套合产出是寻找金矿脉的地球化学标志。Ｔｉ含量可作为评价矿化脉含金性的地球化学标志。根据原生异常特征和矿脉中元素的分布，推测Ｍ１１３矿脉在深部有尖灭再现。乌拉山群地层中金的初始富集和大桦背花岗岩的岩浆期后热液均提供了成矿物质。
The Wulshan gold deposits exist in the metamorphic formation ofArchean Wulashan group,and the spatial distribution of various ore veins is closelyrelated to the Dahuabei granites(γ_4-γ_5).The interlinked occurrente of positiveanomalies of Au,Ag,W,ect.and negative anomalies of Ba,Sr,Na_2O,ect.is anindicator of the golden vein,and the content of Ti could be taken as a geochemical markfor evaluating the gold-bearing nature of mineralized veins. It is inferred that the orevein of M113 may reoccur in depth according to the features of primary anomaly and thedistribution of elementsin the vein. The original enrichment of gold in the formation ofWulashan group and the hydrothermal solution derived from the Dahuabei granite allprovide the metallogenic materials.
关键词
地球化学
异常模式
成因
金矿床
Wulashan gold deposit,geochemical anomalous model, genetic study
