强硅化岩的地质、地球化学特征及其找矿评价意义

Geological-geochemical Features of Strong Silicifid Rockand Their exploratory Significance

产于盘古山钨矿床下部的强硅化岩 ,是一套以石英为主要组成矿物的岩石 ,其SiO2 含量一般超过90%。强硅化岩是与钨矿化有成因联系的花岗岩浆接触变质和硅质交代作用的产物。面状强硅化岩发育部位 ,含钨矿化石英脉的数量和脉体总厚度明显减少。面状强硅化岩对盘古山钨矿床的深部隐伏花岗岩体预测和深部找矿评价具有指示意义。

The strong silicified rocks located at the lower part of Pangushan wolframite deposit are a suit of rocks composed of quartz as main mineral composition. Their SiO2 content is generaly more than 90%. The strong silicified rock is a product of metamorphism and siliceous metasomatism of granite genetically correlated with Pangushan wolframite deposit. The extent strong silicified rocks are developped in that part, where amount and general thickness of wolframite-bearing veins obviously were reduced. The strong silicified rocks have an important significance for forecast of concealed granite and exploratory of wolframite-bearing quartz in deep part of Pengushan deposit.