摘要
该矿床是在苗儿山花岗岩复式岩体首次发现的,对此,研究不多。笔者结合野外地质调查及普查岩心取样,室内对样品整理进行物理化学分析等工作得出结论：白钨矿的形成与志留纪花岗岩密切相关。青白口纪花岗岩早中期 K2 O 〉 Na2 O,中晚期相反, K2 O 〈 Na2 O, SiO268．85%-76．24%,岩石属于中-高钾钙碱性系列过铝质花岗岩。青白口纪花岗岩为志留纪白钨矿成矿提供了矿源,志留纪通过进一步结晶分异交代而形成了白钨矿。晚三叠纪花岗岩W的含量高于背景值数倍,与W成矿也存在一定的关系。根据其特征定性该矿床成因类型为与岩浆岩有关的中-高温热液交代-充填型白钨矿床。
Summary： The research is not much about this mineral deposit which is the first time been discovered in Miaoer-shan complex granite batholiths. And we can get the following conclusion by field geological investigation, core sampling and arranged the samples for physical and chemical analysis etc. The formation of scheelite and Silurian granite are strongly-related. Regarding Qingbaikouan granite in early-mid-phase the K2 O〉Na2 O, by contraries the K2 O〈Na2 O, SiO2 68. 85% -76. 24% in the advanced stage. The rock belongs to peraluminous granite of mid-high K calc-alkaline series. The Qingbaikouan granite provides rock source for the formation of Silurian scheel-ite. Then fractional crystallization - metasomatism in Silurian and formed scheelite. The W contents are multiple-above the background value in late-Triassic period and there is a correla-tion with mineralization. According to the features we may define its genetic types of this granite as magmatite-related mid-high pyrometasomatic filled-type scheelite.
出处
《四川建材》
2015年第3期206-208,共3页
Sichuan Building Materials
