广西都庞岭李贵福钨锡多金属矿Re-Os同位素定年研究

Re-Os isotope dating of the Liguifu tungsten-tin polymetallic deposit in Dupangling area,Guangxi

李贵福钨锡多金属矿赋存于都庞岭复式花岗岩体东部。矿床类型主要为云英岩-石英脉型。通过对矿石中辉钼矿Re-Os同位素测年,获得等时线年龄为(211.9±6.4)Ma(n=7,MSWD=4.1),模式年龄的加权平均值为(213.3±2.9)Ma(MSWD=4.0)。结果显示成矿作用发生在印支期,表明都庞岭地区存在早中生代钨锡多金属成矿事件。

The Liguifu tungsten-tin polymetallic deposit occurs in the east of Dupangling granite, being mainly of the greisen-quartz vein type. The precise Re-Os isotope dating of molybdenite from the ore shows that the isochron age is （211.9±6.4）Ma （n=7,MSWD=4.1）, and the weighted average of model ages is （213.3±2.9） Ma （MSWD=4.0）. The isochron age suggests that mineralization took place in the Indo-Chinese epoch, and the result demonstrates that Early-Mesozoic tungsten-tin polymetallic mineralization did happen in Dupangling area.