河南省洛宁县龙门店银矿区矿体特征及成矿规律

发布时间：2018-06-06 18:37

本文选题：银铅矿 + 矿体特征　；参考：《中国地质大学(北京)》2015年硕士论文

【摘要】：银具很多优点,导热性能佳、导电性强、延展性好,还耐腐蚀,所以广泛应用于现代国防、工业、生活等领域,成为现代社会不可或缺的重要原料。龙门店银铅矿研究区位于豫西熊耳山北坡,龙王庙岳坪沟构造带上,主要矿体赋存与太古界太华群片麻岩系中,矿区北邻铁炉坪大型银铅矿。本文运用地球化学、矿物学等多学科的理论和方法,对矿体的分布赋存规律、矿体的形态、厚度、产状、对矿石成分、化学组分、含量变化、矿石结构、构造、矿石自然类型、工业类型及矿成矿机制等都进行了较为详细的研究,并指出了找矿方向。研究发现,龙门店银铅矿石中矿物种类比较多,主要金属矿物有辉银矿、自然银、角银矿、银黝铜矿、银金矿、黄铁矿、黄铜矿、方铅矿、磁黄铁矿、磁铁矿、白铅矿、孔雀石,非金属矿物有长石、石英、角闪石、云母及碳酸盐类矿物等。前期太华群地层中的银在区域变质过程中产生活化和迁移,并在有利部位初步富集;熊耳群火山活动一边使得断裂构造带活化,一边又使银再次通过迁移而达到富集;大规模的燕山期岩浆活动使得蚀变带部分扩容,且自身携带的成矿物质开始进入,为成矿物质的活化和转移提供热源,从而形成了富含矿物的热液。NNE向断裂构造带为金属矿物沉淀和含矿热液上升提供场所和通道。如此形成了今天的银铅矿床作者就研究区银铅矿的矿体特征找、成矿规律、矿标志及找矿方向进行了总结,指出了今后的找矿方向。
[Abstract]:Silver has many advantages, such as good thermal conductivity, good electrical conductivity, good ductility, corrosion resistance, so it is widely used in modern national defense, industry, life and other fields, become an indispensable and important raw materials in modern society. Longchang silver-lead ore research area is located on the northern slope of Xiongershan, Longwangmiao Yuetinggou structural belt. The main ore bodies are located in the gneiss series of Taihua Group in Archaean, and the large silver lead ore in Tielaoping is located in the north of the ore area. Based on the theory and method of geochemistry and mineralogy, this paper deals with the distribution and occurrence of ore body, the shape, thickness, occurrence of ore body, the change of ore composition, chemical composition, content change, ore structure, and the natural type of ore. The industrial types and ore-forming mechanism are studied in detail, and the prospecting direction is pointed out. It has been found that there are many kinds of minerals in the silver lead ores in Longshen, and the main metallic minerals are pyroxene, natural silver, hornite, silver tetrahedrite, silver gold, pyrite, chalcopyrite, galena, pyrrhotite, magnetite, white lead. Malachite, non-metallic minerals have feldspar, quartz, hornblende, mica and carbonate minerals. In the early stage, the silver in the Taihua Group strata was activated and migrated during the regional metamorphism, and initially enriched in the favorable position, while the Xiong'er Group volcanic activity activated the fault structural zone, on the other hand, the silver was enriched again through migration. The large-scale Yanshanian magmatic activities partially expanded the alteration zone, and the ore-forming materials carried by themselves began to enter, which provided a heat source for the activation and transfer of the ore-forming materials. Thus, the mineral-rich hydrothermal. NNE trending fault zone provides a place and channel for the deposition of metallic minerals and the rise of ore-bearing hydrothermal solution. In this way, the authors of today's silver and lead deposits have summarized the orebody characteristics, metallogenic rules, ore marks and prospecting directions of the silver and lead ore deposits in the study area, and pointed out the prospecting direction in the future.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.52

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