黔西北地区地球物理特征与铅锌矿控矿构造分析  

Geophysical Characteristics and Pb-Zn Ore-controlling Structures in Northwestern Guizhou

作　　者：王亮 张嘉玮 向坤鹏 陈囯勇 胡从亮 张琛 WANG Liang;ZHANG Jiawei;XIANG Kunpeng;CHEN Guoyong;HU Congliang;ZHANG Chen(Guizhou Institute of Geological Survey,Guiyang,Guizhou 550081,China;Guizhou Engineering Research Center for Geologic-Geophysical Exploration Development and Application,Guiyang,Guizhou 550081,China;Bureau of Geology and Mineral Exploration and Development of Guizhou Province,Guiyang,Guizhou 550004,China;Seventh General Team of Guizhou Nonferrous Metals and Nuclear Industry Geological Exploration Bureau,Guiyang,Guizhou 550005,China)

机构地区：[1]贵州省地质调查院,贵州贵阳550081 [2]贵州省地质物探开发应用工程技术研究中心,贵州贵阳550081 [3]贵州省地质矿产勘查开发局,贵州贵阳550004 [4]贵州省有色金属和核工业地质勘查局七总队,贵州贵阳550005

出　　处：《现代地质》2019年第2期325-336,共12页Geoscience

基　　金：贵州省地质矿产勘查开发局重大科研专项"黔西北地区铅锌找矿攻关"(黔地矿纪要(2015)14号);贵州省科学技术厅项目(黔科合平台人才[2018]5626;黔科合[2016]平台人才5401;黔科合平台人才[2017] 5739)

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F_1与北东向断裂F_2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(F_(10)、F_(11))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(F_1—F_(16))分布区有望成为铅锌成矿的重点找矿地段。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.

关 键 词：重磁场 地面磁测 深部断裂 浅表断裂 铅锌矿床 黔西北 

分 类 号：P542[天文地球—构造地质学]