【摘要】 黔西北位于川滇黔铅锌成矿域乌蒙山重力梯级带上,地质构造异常复杂,找矿前景巨大,但研究程度低。近年来,在织金五指山、赫章猪拱塘等地取得了大型、超大型铅锌找矿历史性突破,指示区内具有形成超大型铅锌矿床的潜力。根据区域重力、航磁、地质以及1∶5万地面磁测等资料,划定了区内的深、浅部断裂构造。结果显示,铅锌矿床的分布与推测的深部及浅表断裂带具有良好的耦合关系。在威宁李子沟一带,北西向断裂F₁与北东向断裂F₂呈"十"字形分布,为两条典型的控矿构造;在以那架—小猫场地区,两条大致平行的北东向断裂(F₁₀、F₁₁)联合控矿。结合区域资料综合分析认为,深部断裂主要为导矿-容矿构造,是形成大型-超大型铅锌矿床的有利地段;浅表断裂则主要为容矿构造,推测的主要断裂(F₁—F₁₆)分布区有望成为铅锌成矿的重点找矿地段。更多还原

【Abstract】 Northwestern Guizhou is located in the Wumengshan gravity gradient belt of Sichuan-Guizhou-Yunnan Pb-Zn metallogenic domain. The domain is characterized by complex geological structure and geophysical anomalies,with low degree of research and substantial exploration potential. In recent years,the discovery of the large and super-large Pb-Zn deposits at Wuzhishan and Zhugongtang indicates huge potential of super-large Pb-Zn discovery in this region. Based on surficial geological survey,and regional gravity,aeromagnetic and 1∶50 k ground magnetic survey,major shallow and deep faults were delineated in this study. The results show the coupling relationship between the Pb-Zn deposits and the inferred deep and shallow faults. The typical orecontrolling fault F₁ cut fault F₂（in Lizigou,Weining,NW Guizhou） are NW-and NE-trending,respectively. In Yinajia-Xiaomaochang area,the two roughly parallel NE-trending faults(F₁₀,F₁₁) are both ore-controlling.Comprehensive analysis of regional geological data shows out that the deep and shallow faults are the main oreforming/-hosting and ore-hosting structures,respectively,and the former are permissive to the formation of large to super large Pb-Zn deposits. It is speculated that the area around the major faults(F₁-F₁₆) can be a high potential area for Pb-Zn prospecting.更多还原