江西茅坪钨锡矿床地质特征及成矿模式

茅坪钨锡矿床是一个石英脉型和云英岩化花岗岩浸染型共存的矿床。石英脉型钨锡矿床产于燕山早期(γ52-2b)隐伏花岗岩外接触带,赋存于寒武系中下统浅变质岩中,多组成矿裂隙发育,产状复杂,在走向上相互交叉,在倾向上交叉呈"X"型,呈共轭形式出现;云英岩化花岗岩浸染型钨锡矿床位于石英脉型钨锡矿床下部,赋存于燕山早期(γ52-2b)隐伏花岗岩内接触带小突起部位,呈似层状,透镜状沿花岗岩顶部呈面型分布,构成"上脉下体"成矿模式。

The Geological Characteristics and Mineralization Model of A Tungsten-tin Deposit

Maoping W-Sn quartz vein deposit is a tungsten-tin deposits associated with the granite,greisen deposits.The quartz vein type tungsten-tin deposits occur in the early Yanshan Geological Period（γ52-2b） buried outside the contact zone of granite.It occurs in the lower Cambrian rocks in the shallow system of multi-mineral composition of fracture and complex occurrence.It was demonstrated in the in the cross ＂X＂ tendency with conjugated form.The disseminated greisen-type tungsten-tin is located under the quartz vein typed tungsten deposit.It occurs in the early Yanshan Geological Period（γ52-2b） within the contact zone of granite buried parts of the small protrusions.It constitutes a metallogenic model of ＂ upper vein and lower ore body＂ with the small protrusions distributing along lenticular stratiform.