【作者】 鲁玉龙；

【导师】 陶晓风；

【作者基本信息】 成都理工大学 ， 构造地质学， 2011， 硕士

【摘要】 内蒙古金豆子山铅锌矿床是一个以铅锌为主,伴生银的铅锌多金属矿床。大地构造位置位于华北地台北缘、白云鄂博裂谷带中,是比较典型的热液型铅锌银多金属矿床。本论文运用成矿构造系列及成矿系列的理论和方法,对金豆子山铅锌矿床矿床地质特征、构造控矿作用进行了研究,分析了其成矿规律和找矿标志。并在构造地球化学、地球物理异常分析的基础上,对深部和边部进行了找矿预测研究。论文主要包括以下主要内容:探讨了矿区地质特征,分别从矿区地层、构造以及岩浆岩方面进行了讨论,认为矿区内的白云鄂博群地层可以作为矿源层;构造是成矿的重要影响因素,控制了成矿岩体的侵位和矿体的形成及定位;燕山期岩浆岩是有利的成矿母岩。对金豆子山铅锌矿床矿床地质特征进行了研究,重点剖析了Ⅰ号脉的地质特征,分别从矿体的位置、形态、产状、规模和品位变化,矿石的结构、构造,围岩蚀变,成矿阶段方面进行了研究。本论文对矿床控矿构造进行了研究,构造是金豆子山铅锌矿床成矿的重要因素。构造与成矿的关系主要表现为:一、使成矿物质活化转移;二、为成矿提供赋存空间;三、为矿液运移提供导矿通道。构造运动往往伴随有岩浆活动,含矿流体在构造动力和岩浆热力的驱动下产生活化转移。构造运动产生的断裂破碎带则为成矿提供导矿通道和赋矿空间。认为区域的郝家营子断裂为矿区的控岩构造,矿床内的压扭性F1断裂破碎带为导矿构造和容矿构造。地球化学研究提出了本区为Pb+Zn+Ag矿床组合类型,并且对Pb、Zn、Ag异常区进行了评价分析。对矿区进行了双频激电扫面和激电测深研究,并且对异常区做了评价。本区的成矿元素具有分带性,从内部的W、Mo组合→Cu、Fe(高、中温带)→Zn、Pb、Ag组合(中低温带)。在上述基础上,总结了其地质、地球化学、地球物理方面有利的找矿依据和信息,依据热液成矿系列理论提出了深、边部的找矿靶区。更多还原

【Abstract】 Inner Mongolia Jindouzi mountain deposit is a typical hydrothermal lead-zinc silver polymetallic deposit which mainly comprise with Pb-Zn and silver associated. Its tectonics locates in the north edge of North-China Platform, Baiyunebo rift belt.In this paper, the theory and methods of genesis and metallogenic series for hydrothermal deposit were applied to analyse the geological characteristics and ore-controlling structure of Jindouzi mountain lead-zinc deposit. Based on the analysis of tectonic geochemical and geophysical anomalies combined with the regularity of ore formation and the ore-prospecting marks, research on seeking-ore prediction has been done. Contents of thesis are as follows:Geological characteristics in mining area were discussed form strata, magma, and structure. Results suggested that Baiyunebo stratum was considered as the source bed; structure, as the main impact factor of mineralizing, dominated the invasion of metallogenic rock and the formation and positioning of ore body; Yanshanian magmatic rock was favourable metallogenic parent rock.Geological characteristics of Jindouzi mountain deposit were studied; more analysis was conducted on Vein I from the changes on position, shape, occurrence, dimension and grade of ore body, texture and structure of ores, wall rock alteration and metallogenic phase.The results of the ore-control structures study suggested that structure is the key factor of mineralizing in Jindouzi mountain lead-zinc deposit. Relationships of structure and mineralizing mainly showed as follows: 1. making the activation transfer of ore-forming materials; 2. providing the occurrence space for mineralization; 3. serving as the lead ore channel for migration of ore fluid. Tectonic movement always led to magma activity, which resulted in the activation transfer of mineral-laden fluid driven by tectonic dynamics and magmatic thermal. Fracture zone caused by tectonic movement provided the lead ore channel and occurrence space for mineralization. Haojiayingzi fracture was considered as the rock-control structure, transpressional fracture zone in the deposit was the passage-away and host structure for ore fluid.Pb+Zn+Ag deposit type was presented in terms of studying on geochemistry, and evaluation analysis on anomalous areas of Pb, Zn, and Ag was also conducted. Research of dual-frequency induced polarization scanning and induced polarization sounding were performed in the deposit and anomalous areas were evaluated. Zonation of metallogenic elements showed as: from the interior of W, Mo combination to Cu, Fe (high-medium temperate zone) to Zn, Pb, Ag combination (low temperate zone).Based on the above, deep and adjacent prospecting target areas were suggested in the light of hydrothermal ore-forming series theory and summary of the geological, geophysical and geochemical favourable ore-prospecting evidence and information.更多还原