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分散元素广泛应用于高新技术领域,具有重要的经济价值,但因其在地壳中的低含量和其本身地球化学性质的分散性而不易富集成矿,但是富乐铅锌矿床中却有4种分散元素Cd,Se,G e,G a具有工业价值。该矿床位于我国重要的川滇黔多金属成矿带南东部,分散元素主要赋存在闪锌矿中,平均w(B)/10-6分别为Cd 16 183,Se 163,G e 135,G a 86,其中w(Cd)是迄今国内最高。闪锌矿分棕黑色、红棕色和黄棕色3种颜色。Cd在深色闪锌矿中而G e和G a在浅色闪锌矿中相对富集,Se在不同颜色闪锌矿中含量几乎不变。Cd,G e,Se主要呈类质同象形式存在,Cd,G e占据Zn的位置,而Se占据S的位置。G a主要以显微吸附形式存在,少量以类质同象形式存在。Zn与Cd负相关,而与G e正相关,与Se不相关。分散元素地球化学特征指示矿床为沉积-改造成因。
Dispersing elements are widely used in high-tech fields and have important economic value. However, due to their low content in the crust and their own geochemical dispersion, they are not easily enriched in mineralization. However, there are four Dispersing elements Cd, Se, G e, G a have industrial value. The deposit is located in the south east of the important polymetallic metallogenic belt of Sichuan, Yunnan and Guizhou provinces. The disperse elements mainly exist in the sphalerite. The average w (B) / 10-6 are Cd 16 183, Se 163, G e 135, G a 86, where w (Cd) is by far the highest in the country. Sphalerite sub-brown black, red-brown and yellow-brown 3 colors. Cd is in dark sphalerite and G e and G a are relatively enriched in light-colored sphalerite and Se content in sphalerites of almost the same color is almost unchanged. Cd, Ge, Se exist in the form of isomorphism, while Cd and G e occupy Zn sites while Se occupies S sites. G a mainly exists in the form of microscopic adsorption and a small amount exists in the form of isomorphism. Zn is negatively related to Cd, positively related to G e, and not related to Se. The dispersive element geochemical characteristics indicate that the deposit is the cause of sedimentation-reformation.