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独山锑矿田位于扬子地块东南缘与华南褶皱带接合部位,是我国华南锑成矿带的重要组成部分。虽然许多学者对矿田内的典型矿床进行了大量研究工作,但对成矿物质来源还存在很大争论。本次工作总结了矿田内各类地质体中Sb、Hg和As等成矿元素含量特征,结合区域基底岩石中成矿元素含量的分析资料,探讨了锑矿床的成矿物质来源。结果表明,矿田各地质体均相对富集成矿元素,其中下泥盆统丹林组(D1dn)和中泥盆统独山组宋家桥段(D2d2)石英砂岩、碳酸盐岩具有矿源层意义,但锑矿床成矿物质主要来源于区域基底岩石。
The Dushan antimony ore field is located at the junction of the southeastern margin of the Yangtze block and the South China fold belt and is an important part of the antimony metallogenic belt in South China. Although many scholars have done a lot of research on the typical deposits in the orefields, there is still much debate on the sources of ore-forming materials. This work summarizes the characteristics of ore-forming elements such as Sb, Hg and As in various types of geological bodies in the ore field. Based on the analysis data of ore-forming elements in basement rocks, the sources of ore-forming materials of antimony deposits are discussed. The results show that all the geologic bodies in the ore field are relatively enriched in ore-forming elements. The D1dn in the Lower Devonian and the D2d2 quartz sandstone and carbonate rock in the Dushan Formation in the Middle Devonian have the significance of the source rocks , But the ore-forming materials of antimony deposits mainly come from regional basement rocks.