石英脉型钨矿成矿模式研究现状

Research status of quartz vein type tungsten mineralization model

本文主要对石英脉型钨矿的成矿条件做了总结。石英脉型矿区内普遍发育的变质岩具有细致、塑性和不透水的特点。当处于隆起区或花岗岩侵位较高的地段,在适宜的构造作用下,矿化裂隙的发育部位,往往被限制在下部的成矿岩体中。因浅变质岩层比较软韧,通常只表现轻微的挠曲等塑性变形。因而对矿化溶剂起到屏蔽作用,如九龙脑网脉浸染黑钨矿,其网脉或矿体的最发育地段,也是紧靠浅变质岩底面以下的内接触带,其泥质岩石的屏蔽作用十分明显。

In this paper,the metallogenic conditions of quartz vein type tungsten ore are summarized.Metamorphic rocks commonly developed in quartz vein mining areas are characterized by fineness,plasticity and impermeability.When located in uplift area or granite emplacement higher section,under the appropriate tectonic action,the mineralized fracture development site is often limited in the lower mineralized rock mass.Because the shallow-metamorphic rocks are soft and ductile,they usually show only slight flexure and other plastic deformation.Therefore,it has a shielding effect on the mineralization solvent.For example,the reticulum vein of Kowloon brain disseminated wolfram deposit,the most developed area of the reticulum vein or orebody is also the inner contact zone immediately below the bottom of the shallow metamorphic rock,and the shielding effect of the argillaceous rock is very obvious.