青海省格尔木市河西地区金矿成矿预测

发布时间：2019-04-02 20:24

【摘要】：河西地区大地构造位置位于东昆仑弧盆系与康西瓦-南昆仑-玛多-玛沁-勉县-略阳对接带结合部,构造线主体呈北西西向,东昆中断裂带横贯研究区中南部,区内经过加里东期、华力西期、印支期、燕山期多期次岩浆活动,出露地层以古元古界结晶基底、中新元古界变质基底,以及三叠系碎屑岩-火山岩建造为主,经过了吕梁期、晋宁期、华力西期、印支期多期次区域变质,具有良好的铜、金、铅锌、镍等有色金属、贵金属矿成矿条件。本文全面收集了该地区去已有的区域地质矿产工作资料,对研究区内的成矿地质背景、地球化学条件、地球物理条件进行了全面、系统的分析,获取了大量的有用信息。通过对比区内典型矿床的地质特征等,对河西地区控矿因素进行了分析,确定了找矿标志,建立了预测找矿模型,最后综合圈定了找矿远景区及找矿有利靶区。论文取得的主要成果和认识如下:(1)系统收集了河西地区地质资料,对文字资料进行了分类归并,图件资料在MAPGIS平台进行了矢量化和属性结构添加,建立了研究区基础地质数据库。(2)重点对河西地区的地球化学条件进行系统整理和研究,分别分析描述了与Au相关的4个综合异常。其中HS25号异常,该异常强度高,浓集中心明显,现已有矿权,是一矿致异常,在HS23、HS32、HS33号异常内均发现铜金矿化点,肯定了异常的存在,说明本区找金前景十分乐观。(3)系统地对研究区内典型矿床纳赤台金矿矿床类型及分布特征进行详细研究。(4)系统的对河西地区的成矿地质条件进行分析,确定了找矿标志,建立了预测找矿模型,最后在研究区综合圈定了3个找矿远景区,并确定了3个重点靶区、5个中等靶区及1个一般靶区。
[Abstract]:The tectonic location in Hexi area is located at the junction of the East Kunlun arc basin system and the Kangxiwa-South Kunlun-Mado-Maqin-Mian County-Laoyang docking zone. The main body of the tectonic line is NW-trending, and the Dongkun fault rift belt crosses the central and southern parts of the study area. Through Caledonian, Variscan, Indosinian and Yanshanian magmatic activities, the exposed strata are mainly composed of Gu Yuan Paleozoic crystalline basement, Miocene Proterozoic metamorphic basement and Triassic clastic rock-volcanic rock formation. Jinning period, Hualixi period, Indo-Chinese period multi-stage sub-regional metamorphism, has good copper, gold, lead, zinc, nickel and other non-ferrous metals, precious metal ore metallogenic conditions. A comprehensive and systematic analysis of the metallogenic geological background, geochemical conditions and geophysical conditions has been made in this paper, and a great deal of useful information has been obtained from the comprehensive collection of the existing regional geological and mineral resources data in the area in which the ore-forming geological background, geochemical conditions and geophysical conditions of the study area have been studied. By comparing the geological characteristics of typical ore deposits in the area, the ore-controlling factors in Hexi area are analyzed, the ore-prospecting criteria are determined, the ore-prospecting model is established, and the prospecting prospect and favorable targets for ore-prospecting are comprehensively delineated. The main achievements and understandings obtained in this paper are as follows: (1) the geological data of Hexi area are collected systematically, the text data are classified and merged, and the map data are vectorized and attribute structure added on the MAPGIS platform. The basic geological database of the study area has been established. (2) the geochemical conditions in Hexi area have been systemically sorted and studied, and four comprehensive anomalies related to Au have been analyzed and described respectively. Among them, the HS25 anomaly, which is of high intensity and obvious concentration center, is an anomaly caused by one ore. Copper and gold mineralization points are found in the HS23,HS32,HS33 anomaly, which confirms the existence of the anomaly. (3) the types and distribution characteristics of the typical gold deposits in the study area are studied in detail. (4) the metallogenic geological conditions in Hexi area are analyzed systematically, and the ore-forming geological conditions in Hexi area are analyzed systematically. (3) the gold deposit types and distribution characteristics of the typical gold deposits in the study area are studied in detail. The prospecting criteria are determined and the predictive prospecting model is established. Finally, three prospecting prospect areas are comprehensively delineated in the study area, and three key target areas, five medium target areas and one general target area are determined.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.51

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