新疆阿达西金矿床地质特征及矿石矿物学特征研究

发布时间：2018-11-15 13:08

【摘要】：黄金是人类最早发现和使用的自然元素之一,它在各国的国民经济中占有较重要的地位。因此,世界各国都十分重视对金矿的找寻,加强金矿基础地质的研究也是我国矿床研究的重要课题之一。新疆矿藏资源十分丰富,有“金玉之邦”的美称。在新疆区内划分的近40个金矿成矿带中,阿达西金矿所处的西昆仑地区属于新疆金矿研究中相对较薄弱的地区之一,具有较高的研究价值。本论文在收集和分析前人资料的基础上,通过野外实践地质调查,结合室内镜下观察及实验分析测试,总结概述了阿达西金矿床区域地质背景、矿床地质特征,详细研究了阿达西金矿床矿石矿物学特征,简要分析了阿达西金矿床成矿规律及找矿标志、找矿方向,在综合研究分析的基础上,得出以下结论:(1)阿达西金矿床矿体赋存于赛图拉岩群(ChSt.a)片麻岩和提热艾力组浅变质碎屑岩(C2t)中,而且明显受断裂构造及岩浆岩的综合控制。初步确定阿达西金矿床类型以构造蚀变岩型为主,石英脉型次之。(2)阿达西金矿床金属矿物主要有黄铁矿、方铅矿、闪锌矿、黄铜矿、磁铁矿,次之为毒砂、钛铁矿、铜蓝、孔雀石、金红石等,氧化带可见褐铁矿。脉石矿物主要为石英、绢云母、绿泥石,次之为斜长石、钾长石、白云母等。(3)阿达西金矿床矿石构造主要有脉状构造、浸染状构造、细脉浸染状构造、团块状构造、碎裂构造等;矿石结构主要有它形晶结构、自形—半自形晶结构、交代结构、压碎结构等。(4)剪切构造成矿是阿达西金矿床的主要成矿过程,剪切构造带是本区寻找构造蚀变岩带重要的直接标志。矿区内区域性断裂与其所引起次级断裂、断层的交汇部或所引起的次级裂隙、层间破碎带、中酸性大岩体与变质岩围岩的外接触带及已查明矿(化)体的深部均可作为下一步找矿的方向,尤其是在找矿标志藕合较好的地段。
[Abstract]:Gold is one of the earliest natural elements discovered and used by human beings, and it plays an important role in the national economy of various countries. Therefore, countries all over the world attach great importance to the exploration of gold deposits, and strengthening the study of the basic geology of gold deposits is one of the important topics of ore deposit research in China. Xinjiang is rich in mineral resources and has the reputation of "the state of gold and jade". Among the nearly 40 gold metallogenic belts in Xinjiang, the West Kunlun area, where the adasi gold deposit is located, is one of the relatively weak areas in the study of gold deposits in Xinjiang, which is of high research value. Based on the collection and analysis of previous data, the paper summarizes the regional geological background and geological characteristics of the Adaxi gold deposit through field practical geological investigation, combined with laboratory observation and experimental analysis and testing. The ore mineralogical characteristics of the Adaxi gold deposit are studied in detail, and the metallogenic regularity, prospecting criteria and prospecting direction of the Adaxi gold deposit are briefly analyzed. The conclusions are as follows: (1) the ore bodies of the Adaxi gold deposit occur in the gneiss of the Seitura Group (ChSt.a) and the shallow metamorphic clastic rocks (C2t) of the Tieraoli formation, and are obviously controlled by the fault structure and magmatic rocks. It is preliminarily determined that the main type of gold deposit in Adaxi is structural alteration rock type, followed by quartz vein type. (2) the main metal minerals of the Adaxi gold deposit are pyrite, galena, sphalerite, chalcopyrite, magnetite, followed by arsenopyrite and ilmenite. Copper blue, malachite, rutile and so on, oxidation zone can be seen limonite. Gangue minerals are mainly quartz, sericite, chlorite, followed by plagioclase, potassium feldspar, Muscovite, etc. Cataclastic structures, etc.; Ore structures are mainly heteromorphic, automorphic, metasomatic, crushed, etc. (4) Shear structure is the main metallogenic process of the Adaxi gold deposit. Shear structural zone is an important direct sign for finding structural altered rock belt in this area. Regional faults in the mining area and secondary faults caused by them, the intersection of faults or secondary fractures caused by them, interlaminar fracture zones, The outer contact zone between intermediate-acid rock mass and metamorphic rock mass and the depth of the known ore-body can be regarded as the next prospecting direction, especially in the areas where the prospecting markers are well coupled.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.51

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