【摘要】 云南腾冲地区正在活动的热泉中普遍含有Li、Be、Rb、Cs等稀有金属和W、Sb、Tl、Mo等微量元素,以Li、Rb、Cs、W的富集最为显著。热泉中Li、Rb、Cs、W的平均值分别为2895.1μg/L、839.8μg/L、417.9μg/L、61.74μg/L,普遍高于Cu、Pb、Zn的含量(分别为13.6μg/L、0.24μg/L、6.83μg/L)。Au、Ag等贵金属和稀土元素的含量很低,基本上低于检出限。此外,温度越高的泉水稀有金属的含量也相应增高;而氦同位素资料表明,热泉中不但有幔源物质的供给,而且,随着幔源组分贡献的增大,稀有金属的含量明显升高。因此,热泉活动是可以导致稀有金属富集成矿的。鉴于腾冲地区水热活动广泛而强烈,近20年来不同年份热泉中Li的含量又是相对稳定的,可以认为热泉不但可以形成稀有金属矿床,而且速度是比较快的。每年随着水热活动带出的锂金属量可达500多吨,其成矿效果明显优于贵金属、稀土和铜铅锌等有色金属。研究热泉型稀有金属的成矿机制,对于我国西南三江地区寻找热液蚀变或热泉沉积型稀有金属矿床,具有重要的理论意义和现实意义。更多还原

【Abstract】 There are rare metals such as Li, Be, Rb, Cs, Sb, Tl, Mo and other trace elements in active hot springs in Tengchong area of Yunnan Province. The enrichment of Li, Rb, Cs, W is the most significant, with the values of Li, Rb, Cs and W in hot springs averaged at 2895.1 μg/L, 839.8 μg/L, 417.9 μg/L and 61.74 μg/L, respectively, which are generally higher than those of Cu, Pb, Zn(13.6 μg/L, 0.24 μg/L and 6.83 μg/L respectively). The contents of precious metals and rare earth elements such as Au, Ag are very low, which are basically below the detection limit. In addition, the content of rare metals in spring water with higher temperature also increases, and helium isotope data show that there is not only the supply of mantle-derived materials in hot springs, but also the content of rare metals increases with the contribution of mantle-derived components. Therefore, hot spring activity can lead to the enrichment and mineralization of rare metals. In view of the extensive and intense hydrothermal activity in Tengchong area and the relatively stable content of Li in hot springs in recent 20 years, it can be concluded that hot springs can not only form rare metal deposits, but also have a relatively fast speed. The amount of lithium that comes out of hydrothermal activity can reach more than 500 tons a year. The ore-forming effect of rare metals by hot spring is better than that of precious metals, rare earth, copper, lead and zinc. It is of great theoretical and practical significance to study the metallogenic mechanism of hot spring rare metals in the search for hydrothermal alteration or hot spring sedimentary rare metal deposits in Sanjiang area of southwest China.更多还原