四川石棉金矿床中的黝铜矿族矿物

TETRAHEDRITE GROUP MINERALS IN GOLD DEPOSITS OF SHIMIAN, SICHUAN

四川石棉西部碳酸盐岩系中的金矿床产于泥盆系中统 ,受层间蚀变破碎带控制。其中分布有为数较多的黝铜矿族矿物 ,与黄铁矿、黄铜矿、方铅矿、闪锌矿和 Au- Ag系列矿物共同组成矿石的矿物组合和 Au- Cu- Ag- Pb- As- Sb- Bi的元素组合。电子探针分析表明黝铜矿族矿物有锌黝铜矿、黝铜矿、砷黝铜矿和锌砷黝铜矿等 ,其中 ,Fe- Zn、As- Sb之间分别呈完全类质同象。在垂向上 ,黝铜矿的成分自上而下由富锌锑向富铁砷演变。黝铜矿族矿物的产出及分带特征对于区内同类金矿的勘查具有重要意义。

There are relatively more tetrahedrite group minerals in gold deposits occurring in the interstratified fractured belt of Middle Devonian carbonate rock series in western Shimian of Sichuan Province. The gold ore consists of pyrite, tetrahedrite group minerals, galena, sphalerite, and gold silver series minerals, with an element association of Au Cu Ag Pb As Sb Bi. From the electron microprobe analyses the tetrahedrite group minerals include zinc tetrahedrite, tetrahedrite, tennatite, and zincotennatite. The data show that Fe Zn and Sb As are of complete isomorphous replacement in the tetrahedrite group mineral series. There is a vertical change in chemical composition of minerals downward from zinc and antimony rich tetrahedrite to iron and arsenic rich tetrahedrite. Their occurrence and zonal features are very important for the exploration of the same type of gold deposits in western Shimian.