摘要
云南腾冲新岐钨锡多金属矿产于钠长变花岗岩体中,矿化类型主要为石英脉型,次为云英岩型。对矿区含矿石英脉中8个辉钼矿样品进行了Re-Os同位素测定,首次获得了新岐地区精确的成矿年龄为68.6±3.9Ma。该区与成矿密切相关的晚期古永岩体和早期新岐岩体成岩年龄为72~65Ma。在误差允许范围内,可认为该区钨锡多金属矿的成矿与成岩同期,成矿时代同时或稍晚于成岩时代。
Xinqi tungsten-tin deposit is distributed within albite metagranite, Tengchong area, Yunnan Province, China. For the first time, it was found that the mineralization of this deposit consists of mainly quartz-woframite vein-type, and secondly greisen-type mineralization. Rhenium-Osmium isotopic dating for 8 molybdenite samples selected from quartz vein-type ores from this deposit yields a precise isochron age of （68.6±3.9） Ma. The emplacement age of regional granite of later Guyong stock and early Xinqi stock, which is closely related to the mineralization, is 72-65 Ma. It is deduced that the emplacement and mineralization of granite occurred simultaneously within errors or the mineralization is slightly later than the emplacement.
出处
《矿物学报》
CSCD
北大核心
2017年第1期84-92,共9页
Acta Mineralogica Sinica
基金
中国地质调查局"西南地区典型三稀金属矿床研究与靶区优选(编号:1212011120354)
