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对与戈塘金矿共生的萤石微量元素特征研究表明:萤石中Mo,W,As,Cd,Bi等高温元素含量均高于地壳值,V,Cr,Cu,Cs,Th,Mo,Ga和Ge等元素变异系数大,活化能力强。萤石的稀土总量很低,仅为10.299×10-6～17.455×10-6,明显富集重稀土(LREE/HREE为0.48～0.69),并具有Eu和Ce的负异常(δEu为0.71～0.91,δCe为0.62～0.78),Tb/Ca-Tb/La图解显示萤石为热液成因且为热液的晚期阶段。萤石的Rb/Sr比值和初始87Sr/86Sr比值均与地幔值较为接近,反映出其成矿流体主要来源于上地幔或(岩浆)深部。萤石的形成经历了长期演化的热液活动,成矿温度较低(<200°～250°),成矿年龄为(35.83±0.37)Ma(Sm-Nd等时线年龄)。
The study on the trace element characteristics of fluorite coexisting with the Geotang gold deposit shows that the content of high temperature elements such as Mo, W, As, Cd and Bi in fluorite is higher than that of crust, V, Cr, Cu, Cs, Th, Mo, Ga and Ge elements such as large coefficient of variation, activation ability. The total amount of rare earths in fluorite is very low, ranging from 10.299 × 10-6 to 17.455 × 10-6. It is obviously enriched in heavy rare earths (LREE / HREE: 0.48-0.69) and has the negative anomalies of Eu and Ce (δEu: 0.71 ~ 0.91, δCe 0.62 ~ 0.78). The Tb / Ca-Tb / La diagram shows that fluorite is the hydrothermal origin and is the late phase of hydrothermal fluids. The fluorite Rb / Sr ratio and the initial 87Sr / 86Sr ratio are close to the mantle values, reflecting that the ore-forming fluid mainly comes from the upper mantle or the deeper part of (magma). The formation of fluorite underwent a long-term evolution of hydrothermal activity. The metallogenic temperature was lower (<200 ° -250 °) and the metallogenic age was (35.83 ± 0.37) Ma (Sm-Nd isochron age).