小草坝钨矿床地质特征及成因

Geological Characteristics and Genesis of Xiaocaoba Tungsten Deposit

四川阿坝地区的小金县出露万里城、葫芦海子、空卡梁子、二毛山等多处燕山期岩体,区域地质调查过程中在其外围发现了多处辉钼矿化点,成矿潜力大,但总体地质工作程度低,未有大的找矿突破。近年通过勘查工作,在葫芦海子岩体外围发现一大型斑岩-矽卡岩型白钨矿床(小草坝钨矿床)。总结了该矿床的成矿规律,探索了该矿床的碱交代特征,并采用“地球排气作用”理论分析了矿床成因,为该地区其他岩体外围的探矿工作提供了有益借鉴。

There are exposed Wanlicheng,Huluhaizi,Kongkaliangzi,Ermaoshan and other Yanshanian rock mass in Xiaojin County,Aba Prefecture,Sichuan Province.In the process of regional geological survey,a number of molybdenum mineralization points were found on the periphery of the rock mass,which has great metallogenic potential.However,the overall degree of geological work is low and there is no major prospecting breakthrough.In recent years,a large porphyry-skarn W-Mo deposit(Xiaocaoba Tungsten Deposit)has been discovered in the periphery of Huluhaizi rock mass through exploration work.The metallogenic regularity of the deposit is summarized in this paper,and the alkali metasomatism characteristics of the deposit are explored.The genesis of the deposit is analyzed by using the theory of"earth exhaust",which provides a reliable reference for the prospecting work on the periphery of other rock masses in this area.