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利用电子探针(EPMA)、电感耦合等离子质谱(ICP-MS)等分析了天桥铅锌矿床矿石矿物中分散元素的含量、赋存状态及规律,结果表明分散元素在该矿床中含量达到了综合利用评价指标,有的甚至达到了工业品位(如Cd等);这些分散元素可能以类质同象的形式赋存在硫化物矿物中,其规律为Ga、Cd、In等赋存在闪锌矿中,Ge、Tl等赋存在方铅矿中,黄铁矿中分散元素富集低;在不同颜色闪锌矿中,Ga、Cd富集规律表现为浅色闪锌矿>中色闪锌矿>黑色闪锌矿,而Ge、Tl、In、Se富集表现出中色闪锌矿相对高于浅色及黑色闪锌矿;同标本中,不同颜色闪锌矿的Ge、In富集规律在还显示浅色闪锌矿>中色闪锌矿>黑色闪锌矿,而Ga、Tl、Cd、Se富集规律呈现中色闪锌矿相对高于浅色及黑色闪锌矿。Ga/In、Zn/Cd等参数指示出矿床成因类型可能为热液-沉积-改造。
The contents, occurrences and regularities of dispersive elements in ore minerals of Tianqiao Pb-Zn ore deposit were analyzed by electron probe (EPMA) and inductively coupled plasma mass spectrometry (ICP-MS). The results showed that the contents of disperse elements in this deposit reached a comprehensive Some of them even reach the industrial grade (such as Cd, etc.) by using the evaluation index. These disperse elements may exist in the sulfide minerals in the form of isomorphism. The regularity is that Ga, Cd, In, etc. exist in the sphalerite , Ge and Tl exist in galena, and the enrichment of dispersed elements in pyrite is low. The enrichment rules of Ga and Cd in different colors of sphalerite are as follows: light-colored sphalerite> middle-sphalerite> Black sphalerite, while the enrichment of Ge, Tl, In, Se shows that the color of sphalerite is relatively higher than that of light-colored and black sphalerite. In the same sample, the enrichment regularity of Ge and In of different colors of sphalerite Light-colored sphalerite> medium-colored sphalerite> black sphalerite are also shown, while the enrichment of Ga, Tl, Cd, Se shows that the medium-colored sphalerite is relatively higher than the light-colored and black sphalerite. Ga / In, Zn / Cd and other parameters indicate that the genetic type of the deposit may be hydrothermal-sedimentation-alteration.