GEOLOGICAL CHARACTERISTICS AND PROSPECTING ANALYSIS OF THE NAYONGZHI LEAD-ZINC DEPOSIT IN WUZHISHAN ANTICLINE, NORTHWESTERN GUIZHOU
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摘要: 纳雍枝铅锌矿床位于五指山背斜北东部，是五指山矿集区的组成部分.区内铅锌矿体产于清虚洞组的白云岩中，自下而上共划分为9个矿体层，属沉积型铅锌矿床.矿石类型为碳酸盐岩型铅锌矿石.五指山地区位于紫云-垭都深大断裂的北东侧，南东侧有安顺-凯里深断裂，这些深断裂是纳雍枝矿床深部物质来源的前提，次一级的构造为矿床的形成提供了矿质流动的通道.五指山背斜Pb、Zn综合异常明显的部位，异常与区内构造较吻合，与矿床（点）展布方向一致.该矿床与典型密西西比河谷铅锌矿床具有较高的可比性.通过对纳雍枝铅锌矿床地质特征的总结及分析，认为五指山地区的找矿前景十分广阔.Abstract: The Nayongzhi Pb-Zn deposit, situated in the northeast of Wuzhishan anticline, is a component of the Wuzhishan ore-concentrating zone. The orebodies occur in the dolostone of Cambrian Qingxudong formation, consisting of nine ore layers. The ores belong to carbonate rock type. The Ziyun-Yadu deep fault in the southwest and Anshun-Kaili deep fault in the southeast of the region are the prerequisites for the material source of the deposit. The secondary structures provide flow channels for ore fluid. The comprehensive Pb-Zn anomalies coincide to the regional structures, as well as the distribution of ore deposits (occurrences). The Nayongzhi Pb-Zn deposit is much comparable to the Mississippi Valley PbZn deposit. The geological characteristics of Nayongzhi Pb-Zn deposit show a great prospect of exploration in Wuzhishan region.
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