喇嘛苏外围物化异常特征分析及找矿潜力评价

发布时间：2018-01-29 06:03

本文关键词： 喇嘛苏外围物化探找矿潜力评价找矿突破　出处：《新疆大学》2015年硕士论文　论文类型：学位论文

【摘要】：研究区位于西天山铜锌铅多金属成矿带上,属于典型的多因复成矿床,受地层、岩浆岩、构造等因素控制。该成矿带为哈萨克斯坦捷克利多金属成矿带的东延部分,在成矿背景上存在可对比性,且又处于微陆块边缘活动带,因此区域成矿条件十分有利;赋矿围岩为蓟县系库松木切克群灰岩,由于其化学性质的活泼性,是本区成矿的有利矿源层;矿区内沿花岗闪长斑岩边部或其内见有矿体,Cu、Zn、Pb、Ag等微特量元素在花岗闪长斑岩内富集特征,Cu、Zn、Ag等成矿元素含量变化特点与本区矿化富集特征吻合,说明花岗闪长斑岩是提供矿源的重要母岩。喇嘛苏铜矿自1985年开始化探工作至今,前后十余年,先后投入了大量地质工作,积累了丰富的地质资料,并取得了较多的地质成果,已初步确定具有中型以上规模的矿床远景,由于研究区矿床类型尚不清楚、地区第四系覆盖较厚以及前期地质工作对成矿背景、成矿条件、控矿因素等分析总结不够,致使前期工作成果不能有效指导后续地质工作的开展,地质工作缺乏延续性,工作部署前后不一致或前后矛盾。近年来,虽然投入了大量的人力、物力和财力对矿区外围进行了找矿工作,但没有大的突破,仍处于找矿探索阶段。因此,实现矿区外围找矿的突破,基本查清该地区矿产资源潜力,为该区矿产资源开发提供决策依据,改变该地区自然地理条件恶劣、贫穷、落后地区的经济面貌,振兴经济有着重要的战略意义。本论文研究国内外相似类型矿床研究基础上,收集研究区前人地物化资料,总结分析各类找矿标志,结合野外实际工作认识及对矿区前人取得成果对比借鉴,对矿区外围进行物化探工作及解译分析并找矿潜力评价,对外围找矿方向初步进行了探讨。通过物化探异常工作,结合地质异常特征综合分析,最后经过地质钻探验证工作,初步推断外围(喇嘛苏铜矿北西方向)具有一定的寻找隐伏斑岩型铜(铅锌银)矿的找矿空间。通过地球化学背景和多元统计分析,提出研究区Cu、Pb、Zn、Ag等元素具有一定找矿前景,尤其是Cu元素异常规模大、强度高且化探原生晕异常和激电异常吻合性较好,认为喇嘛苏矿区外围找矿潜力较大,有必要扩大研究范围进行深入研究工作,深部具有大规模矿化体存在可能性大。
[Abstract]:The study area is located in the copper, zinc and lead polymetallic metallogenic belt of the West Tianshan Mountains. It is a typical polygenetic complex deposit, which is affected by strata and magmatic rocks. The ore-forming zone is the eastward extension of the Czech Li-polymetallic metallogenic belt in Kazakhstan, which has a comparable metallogenic background and is located in the marginal active zone of the microcontinental block. Therefore, the regional metallogenic conditions are very favorable; The host rock is limestone of Kusong Muchek group of Jixian system. Because of its active chemical properties, it is a favorable ore source bed for mineralization in this area. Along the edge of granodiorite or in the ore body, there are some microelements, such as Cuznznzn Pbng-Ag, in the granodiorite porphyry, which are characterized by the enrichment of Cu ~ (2 +) Zn in the granodiorite porphyry. The variation characteristics of Ag and other ore-forming elements are consistent with the characteristics of mineralization and enrichment in this area, indicating that granodiorite is an important source of ore. Since 1985, the ore-prospecting of Lamasu copper deposit has been carried out for more than ten years. A great deal of geological work has been put in successively, abundant geological data have been accumulated, and more geological achievements have been obtained. The prospect of ore deposit with medium scale or above has been preliminarily determined, because the type of ore deposit in the study area is not clear yet. The heavy coverage of the Quaternary and the insufficient analysis and summary of the metallogenic background, ore-forming conditions, ore-controlling factors and so on in the early stage of geological work, resulting in the early work results can not effectively guide the development of the follow-up geological work. The geological work lacks continuity, the work arrangement is inconsistent or inconsistent. In recent years, although a lot of manpower, material and financial resources have been put into the prospecting work outside the mining area, there is no great breakthrough. It is still in the stage of prospecting and exploration. Therefore, to realize the breakthrough of ore prospecting in the periphery of mining area, to find out the potential of mineral resources in this area, to provide decision basis for the exploitation of mineral resources in this area, and to change the bad natural and geographical conditions in this area. The economic outlook of the poor and backward areas and the revitalization of the economy have important strategic significance. Based on the study of similar types of deposits at home and abroad, this paper collects the geophysical and chemical data of predecessors in the study area. This paper summarizes and analyzes all kinds of ore-prospecting markers, combines with the understanding of field work and the comparison and reference to the achievements made by predecessors in mining areas, and carries out geophysical and geochemical exploration, interpretation and analysis as well as the evaluation of prospecting potential on the periphery of the mining areas. Through geophysical and geochemical exploration anomaly work, combined with comprehensive analysis of geological anomaly characteristics, finally through geological drilling verification work. It is preliminarily inferred that the periphery (NW direction of Lamasu copper deposit) has a certain prospecting space for concealed porphyry copper (lead-zinc-silver) deposits. Based on geochemical background and multivariate statistical analysis, a study area of CuPb-Pb is proposed. Zn, Ag and other elements have a certain prospecting prospects, especially Cu element anomaly large scale, high intensity and geochemical prospecting primary halo anomaly and induced electric anomaly is in good agreement, it is considered that the ore prospecting potential of the Oesu ore area is great. It is necessary to expand the scope of research and carry out further research.
【学位授予单位】：新疆大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.2;P631;P632

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