赣南盘古山钨矿构造蚀变分带特征与成矿规律研究

发布时间：2018-05-18 09:49

本文选题：盘古山钨矿 + 构造蚀变岩相填图　；参考：《中国地质大学(北京)》2017年硕士论文

【摘要】：赣南盘古山钨矿是将近百年的老矿山,钨及金、银、铅、锌、钼等矿产在全国居重要位置。其地质研究深入而广泛,但是随着矿床深部外围找矿难度的加大,需要进行成矿地质预测理论方法的创新。根据构造结合蚀变岩的岩石学研究非常薄弱的现状,依托于国家科技支撑计划项目下属专题“南岭于都-赣县典型矿田构造控矿和深部成矿规律示范研究”选择“赣南盘古山钨矿构造蚀变分带特征与成矿规律研究”作为研究问题,具有重要的理论意义和找矿应用价值。在垂直方向0-700米海拔范围内的35中段、155中段、335中段、485中段和635中段共5个中段9条实测剖面基础上,系统开展了岩石学研究,建立矿物组合规律,并以此为图例编制了“盘古山钨矿构造蚀变岩三维空间分布图”。同时结合构造演化和岩浆作用等,探讨了盘古山钨矿的成矿规律。研究取得成果和进展如下:(1)通过实测地质剖面研究,把蚀变岩分为富黑云母角岩带、正常黑云母角岩带、绢云母化石英岩带和弱绢云母化石英岩带。系统提出上述4个蚀变分带的野外标志,包括岩石的产状、结构、构造和颜色等野外特征。(2)厘定了构造蚀变岩分带的标志矿物和矿物含量,(1)富黑云母角岩带:石英(20%-40%)、黑云母(40%-70%),含少量绢云母(小于10%);(2)正常黑云母角岩带:石英(60%-80%)、黑云母(20-40%),含少量绢云母(小于10%);(3)绢云母化石英岩带:石英(80%-90%)、绢云母含量(10-20%);(4)弱绢云母化石英岩带:石英含量为90%以上,绢云母含量低于10%。(3)建立了构造蚀变岩分带图例系统,编制了矿床构造蚀变岩三维空间分布图。依据岩石、构造、蚀变、成矿物理化学等成矿机理分析,建立盘古山钨矿构造蚀变成矿模式。研究表明,钨矿化在富黑云母角岩带中比较富集。(4)垂向分带显示浅部以NEE向和NWW向一组共轭断裂控矿,向深部逐渐变化为以一组NWW向断裂为主控矿。NWW向断裂含矿脉数量较多,NWW向断裂的矿脉品位更高。NWW向断裂蚀变带受雁列形式控制,矿脉呈向南东右行侧列特征。运用斜列构造蚀变带特征,指导生产找矿,获得工程验证。
[Abstract]:The Pangushan Tungsten Mine in South Jiangxi is an old mine for nearly a hundred years. Tungsten and gold, silver, lead, zinc, molybdenum and other minerals are in the important position in the country. Its geological research is deep and extensive. However, with the increasing difficulty of prospecting in the deep periphery of the deposit, the theoretical method of metallogenic geological prediction is required to be created. The weak status, relying on the special topic of the national science and technology support plan project, "the demonstration research on the structural ore control and deep metallogenic regularity of the Yudu Ganxian typical ore field in Nanling", selected "study on the characteristics and metallogenic regularity of the tectonic alteration zone of Pangu mountain tungsten mine in Southern Jiangxi" as a research problem, which has important theoretical significance and prospecting application value. On the basis of 9 measured sections, middle 155, middle 335, middle 335, 485 middle section and 5 middle section of the middle section in the middle section of the 0-700 m elevation range, the petrological study was carried out and the mineral assemblage law was established. In addition, the "three dimensional spatial distribution map of the tectonic altered rock of Pangu mountain tungsten mine" was compiled. The metallogenic regularity of the Pangushan Tungsten Deposit is discussed. The achievements and progress are as follows: (1) the alteration rock is divided into the rich black cloud parent rock zone, the normal black cloud parent rock belt, the sericite quartzite belt and the weak sericite quartzite belt through the measured geological section. The form, structure, structure and color of the stone. (2) the marker minerals and mineral content of the tectonic alteration zone are determined. (1) the rich black mica kerate zone: Quartz (20%-40%), biotite (40%-70%), containing a small amount of Sericite (less than 10%); (2) normal black mica zone: Quartz (60%-80%), black mica (20-40%), and a small amount of Sericite (less than 10%); (3) ) sericite quartzite belt: Quartz (80%-90%) and sericite content (10-20%); (4) weak sericite quartzite belt: quartz content is above 90%, sericite content is lower than 10%. (3), and a structural alteration rock zoning map system is set up. The three-dimensional spatial distribution map of tectonic alteration rock is compiled. Mechanism analysis and the establishment of the structural erosion model of Pangu mountain tungsten ore. The study shows that tungsten mineralization is enriched in the rich black mica corner rock zone. (4) the vertical zoning shows a group of conjugated fractures with NEE direction and NWW to the deep part, and gradually changes to the deep part of a group of NWW trending faults, which contain more.NWW veins and NWW faults. The ore vein grade is higher than that of the.NWW fault zone, which is controlled by the form of the wild goose row. The vein is characteristic of the South East and right side row. Using the diagonal structure of the alteration zone, it guides the production prospecting and obtains the engineering verification.
【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】：2017
【分类号】：P618.67

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