青海大黑山钨矿床地质特征及矿床成因分析

通过分析青海大黑山钨矿床的地质特征和矿床成因,结果表明:大黑山钨矿床受岩性—构造控制明显,白钨矿(化)体主要赋存在加里东期黑云母二长花岗岩与古元古界托赖岩群的接触带中的矽卡岩和靠近岩体一侧的云英岩化带中,在与接触带构造相连的次级裂隙中可见石英脉型白钨矿体和萤石脉型白钨矿体;矿体形成多变,以似层状、分支状、透镜体状等为主;矿石品位稳定、厚度变化稳定,属于稳定性矿体。认为大黑山钨矿床主体为矽卡岩型白钨矿体,但具有寻找云英岩化型白钨矿的巨大潜力。

Geological Characteristics and Genesis Analysis of Daheishan Tungsten Deposit in Qinghai

This paper analyzes the geological characteristics and genesis of tungsten deposits in Qinghai great Montenegro.The results show that the tungsten deposits in great Montenegro are obviously controlled by lithology and structure and the wolframite(mineralization).The body mainly has the silicon Xichang in the contact zone between the black Mica two long granite and the ancient Proterozoic Rai group in the Caledonian period.In the greisenization lithology zone near the side of the rock mass,we know that the quartz vein wolframite body and the fluorite vein type wolframite body can be seen in the secondary fissures connected with the contact zone structure.The ore grade is stable,and the thickness changes stably.It belongs to the stable ore body.The comprehensive study of this paper holds that the main body of tungsten deposit in greater Montenegro is skarn type wolframite,but it has great potential to find Yunying lithologic type wolframite.