3105铀钨矿区中钨的成矿实验及其成因意义

Metallogenetic Experiment of Tungsten in 3105 U W Ore District and Its Genetic Significance

３１０５铀钨矿区中钨的成矿实验及其成因意义庞玉惠黄广荣（成都理工学院，成都６１００５９）关键词钨的成矿试验改造热液矿床华南越城岭复式龙岗岩体东侧接触带是一个铀钨锡多金属矿化带。复式花岗岩主要由加里东期花岗岩（γ３）组成，也有少量海西、印支期小岩体和较...

In order to ascertain the source of the ore forming materials of tungsten and the genesis of the mineral deposit in 3105 ore district,the leaching experiments of the main rocks(γ 3,γ 2 5 granite and D 2siltstone)in the ore district with the solution of Na 2CO 3 and NaHCO 3 were made under the low temperature,normal pressure and different pH conditions.The leaching rate of tungsten was 3.3%～23.68%(the leaching rate of tungsten was the highest in granite),and increased with the rising of concentration,temperature and pH of the leaching solution.A dissolving experiment of scheelite under the same conditions showed that its leaching rate reached 23%～26.5% at pH=6～8.The experimental results showed that the post granite hydrothermal activity could leach out a quantity of tungsten from granite and the early tungsten mineralized body.Therefore,theauthors suggested that the ore forming materials of the hydrothermal tungsten deposits were derived from consolidated granite,and that taking into consideration of the time gap between ores and granite(>40 Ma),these hydrothermal tungsten deposit should be transformed hydrothermal deposits rather than magmatic hydrothermal deposits