【作者】 金中国；

【导师】 戴塔根；

【作者基本信息】 中南大学 ， 矿产普查与勘探， 2006， 博士

【摘要】 川-滇-黔铅锌成矿域位于扬子地台西南缘，小江、师宗—弥勒、垭都—紫云三条深大断裂所围限的区域内，是我国“十．五”，“十一．五”加强地质工作的16个重点成矿区带之一。黔西北铅锌成矿区处于川-滇-黔铅锌成矿域东侧，是其重要组成部分，也是贵州省重要的铅锌产地之一。区内铅锌矿床（点），物化探异常成群成带展布，成矿地质条件优越，找矿前景好，具备寻找中、大型矿床的潜力。 黔西北铅锌成矿区区域构造展布、铅锌矿化分布具明显的带状分布特征。本论文根据成矿区构造和矿化特点，划分出4个构造带，3个成矿亚带，首次较详细的阐述了区域构造演化特征，各构造带、成矿亚带的地质特征及成矿特点，物化探异常与铅锌成矿的关系。 铅锌成矿控矿因素研究表明，本区铅锌成矿受地层(S_1-2hj-P_1m)、岩性（碳酸盐岩）、构造（NW向逆冲断层为主+NE向横断层+层间破碎带、背斜倾伏端），岩浆岩（辉绿岩旁侧，玄武岩层位之下），岩相（上泥质（页）岩相，下碳酸盐岩相叠置组合），沉积环境（水下脊状隆起内侧，封闭—半封闭的还原泻湖沉积环境）多重因素控制。断裂构造是最主要的控矿因素，岩性控矿优于层位。 区域主要含矿层位从西到东，从南到北空间分布上逐渐抬升，时间演化上逐渐变新，显示黔西北地区剥蚀程度低，含矿层位保留完好，深部找矿潜力大。 构造分级控矿特点明显，即断陷盆地边缘控制矿带的展布→紧密褶皱及其核部发育的纵断层控制矿田的展布→矿田内主干断层与次级断层交汇部位、背斜倾斜端控制矿床和矿体的产出。区域性大断裂+次级断层+层间挤压破碎带是良好的构造控矿配套系统和导、聚、储矿系统，首次较全面的研究了构造控矿机制。 区内Pb、S、C、O同位素、稀土元素、区域地球化学背景场等特征显示，成矿物质具多来源，成矿作用具多阶段性。成矿元素Pb、Zn、Ag主要来源于下伏老地层，与下寒武统碎屑岩，前震旦系基底火山碎屑岩有关，也与峨眉山玄武岩的喷发有成生联系。成矿流体中S、O来自海相硫酸盐，C来源于海相碳酸盐，成矿流体水主要来源于深部地层变质水，有少量大气降水混合。 矿石包裹体特征显示，成矿流体性质属低温，中高盐度，还原条件，弱碱—弱酸性，高矿化度的Ca-Na-Cl（SO₄）型热液。 研究表明矿床成因类型与世界上密西西比河谷型（MVT）铅锌矿床更多还原

【Abstract】 The lead and zinc metallogenic zone in Chuan - Dian-Qian district lies at the southwest edge of Yangzi platform and in the zone which is surrounded by three deep fracture zones named by Xiaojiang,Shi zhong-MiLe,YaDou-ZiYun. The metallogenic zone is one of sixteen important metallogenic provinces during "10.5 Year Plan "and" 11.5 Year Plan "in our country. The metallogenic zone of lead and zinc ore in the northwest of Qian lies at the east of the metallogenic zone of lead and zinc ore in Chuan - Dian-Qian district. It is one of the important lead and zinc mines in Guizhou province. This place has the potential of seeking middle-scale or large-scale lead and zinc deposit, because physics and chemistry prospection abnormity appears the group- shaped and belt-shaped distribution and the metallogenic geological condition is superior.Regional structure spreading in the lead and zinc metallogenic zone in the northwest of Qian and lead-zinc mineralization in this place takes on obvious belt-shaped distributing character. The author divides four structure belts and three metallogenic sub- belts based on the structure and mineralization feature of the metallogenic zone. This dissertation firstly sets forth in the detail the evolvement character of regional structure, the geologic character and metallogenic character of every structure belt and metallogenic sub- belt, the relation between physics and chemistry prospection abnormity and lead and zinc metallogenyThe research on the metallogenic factor and controlling factors for lead-zinc deposits shows that the metallogenic factors of lead and zinc in this place include stratum(Sl-2hj-Plm), lithology(carbonate rock), structure (NW overthrust fault mainly + NE cross fracture + fracture belt and anticline plunging end) , eruptive (beside diabase, under basalt stratum) , lithofacies (overlap up argillaceous and under carbonate lithofacies), sediment environment (inboard submarine carinate uplift ,closed or half-closed reducing lagoon deposit entironment) etc. Fracture is the most important controlling metallogeny factor and control factors for ore deposit by lithology precede over horizon.更多还原