山东铜岭金矿的矿体定位构造

铜岭金矿位于山东省乳山市东南部，产在三佛山斑状二长花岗岩中，为含金石英脉型金矿。在三佛山岩体边部发育弧形脉岩群，铜岭金矿就位于该弧形脉岩群的弧顶外端，走向ＮＷ，与区内脉岩群垂直，据此提出铜岭金矿受三佛山岩体构造控矿的看法。铜岭金矿矿体的定位还受蚀变带宽度变化的影响，往往产于蚀变带狭缩处与膨大处的转换部位。铜岭金矿矿石金品位及矿体厚度在走向和倾向上均呈串珠状或波状变化。

POSITIONING STRUCTURE OF THE TONGLING QUARTZ-VEIN TYPE GOLD DEPOSIT,SHANDONG PROVINCE

Tongling quartz-vein type gold deposit lies in sourth-east Rushan,Shandong Province,within the Sanfushan porphyritic adamellite body.There is arcuate dyke swarm along the border of Sanfushan rock body and Tongling gold deposit, The gold-bearing veins strike NW and occurred in the outer point of the arcuate dyke swarm and are prependicular with those dyke swarm.Thus we propose that Tongling gold deposit is controlled by the Sanfushan rock body structures and position of the gold orebodies are also affected by variations of the alteration zone.The gold orebodies usually occur in the transitional position between the narrower and wider parts of the alteration zone.The gold grade and thickness of orebody show the feature of paternoster or wavy variation.