青海省格尔木红土沟—红石山一带元素地球化学特征及化探找矿效果

发布时间：2018-04-14 08:32

本文选题：红土沟-红石山 + 水系沉积物测量　；参考：《中国地质大学(北京)》2015年硕士论文

【摘要】：东昆仑地区是秦-祁-昆成矿带中重要的成矿区带之一。格尔木市红土沟—红石山一带通过近年来的综合勘查,在东昆仑地区发现的一批重要的金属矿产地。在充分收集、分析、总结前人的地质、矿产、物化探、科研等成果资料的基础上,通过1：5万水系沉积物及地面高精度磁法测量、地化(岩石)剖面测量及槽探工程验证,初步认为：元古代万保沟群、晚古生代泥盆系、加里东期、晚华力西-印支旋回岩浆岩的元素地球化学特征为成矿元素浓集率高,变化范围大；火山、岩浆携带较多的成矿物质是区内成矿的关键；成矿作用与火山岩浆上侵、喷溢活动相伴随,成矿作用以岩浆作用与叠生成矿为主；成矿元素组合异常主要受近EW向以及NW向断裂(带)控制,而新生代形成的断裂则无多元素异常显示,仅有Hg和Sb、As等条状、串珠状异常分布；元素背景统计和异常查证显示,研究区属区域重要成矿区(带)、可划分Ⅳ级成矿带,资源潜力较大,是寻找金、铜、铅、锌、钴、锑等矿床的重要地带；根据地质单元含矿性评价和成矿元素异常的分布,综合地质成矿规律确定找矿靶区5个,异常查证工作确认了红土沟、大格勒沟脑等一批金铜异常确实存在而且具有良好的找矿前景；根据多元素背景的区域分布及组合特征进行大地构造及地球化学分区,异常反映昆中与昆南主干断裂,Fe、Cu、Co、Ni等基性元素的高背景及异常分布反映本区中基性火山岩地层特征。水系沉积物元素分布特征客观地展现了区内元素含量水平以及区域分布特征,所圈定综合异常,揭示了不同成因、不同类型异常元素组合特征及元素富集规律；各类找矿靶区及成矿远景区划为今后找矿提供了地球化学依据；采用大面积东西向多幅水系沉积物化探测量、小比例尺异常成图,可以很好反映区域地球化学特点和区域成矿规律,对解决区域基础地质问题和区域找矿战略部署具有非常重要的作用；地质、化探、物探相结合的办法,既发挥化探快速确定靶区的优点,又利用地质工作可准确定位的长处,再加上适当地表工程揭露,可取的良好的找矿效果。上述研究基础上,结合区内已发现矿床(点)的矿床地质特征,总结了区域矿床的成矿规律,建立成矿模式。
[Abstract]:East Kunlun area is one of the important metallogenic belts in Qin-Qi-Kun metallogenic belt.The Hongtugou-Hongshi Mountain area of Geermu City has been discovered in East Kunlun area by comprehensive exploration in recent years.On the basis of collecting, analyzing and summing up the previous achievements in geology, mineral resources, geophysical and chemical exploration, scientific research and so on, through the high precision magnetic survey of sediment and surface of water system of 1: 50, 000, geochemistry (rock) profile survey and trough exploration engineering,The elemental geochemical characteristics of the Proterozoic Wanbaogou Group, the late Paleozoic Devonian, Caledonian and late Varissian-Indosinian magmatic rocks are characterized by a high concentration rate of metallogenic elements and a large range of variation, volcanoes, volcanoes, volcanoes, volcanoes, volcanoes, volcanoes, volcanoes, volcanoes, volcanoes, volcanoes.The ore-forming process is characterized by magmatism and superfluous mineralization, which is accompanied by volcanic magma upwelling and exhalation, and the ore-forming process is dominated by magmatism and superimposed mineralization, and the ore-forming process is characterized by magmatism and superfluous mineralization.The assemblage anomalies of metallogenic elements are mainly controlled by the near EW and NW trending faults (zones), while the faults formed in the Cenozoic show no multielement anomalies, only the bands Hg and SbAs are distributed in series, and the background statistics and anomaly verification of the elements show that,The study area belongs to the important metallogenic area (belt), which can be divided into four grade metallogenic belts, and has great resource potential. It is an important area for prospecting for gold, copper, lead, zinc, cobalt and antimony deposits, and is based on the metallogenic evaluation of geological units and the distribution of metallogenic elements anomaly.Five ore prospecting target areas were determined by comprehensive geological metallogenic law. The abnormal verification work confirmed that some gold and copper anomalies such as laterigou and Daglerou really existed and had a good prospecting prospect.According to the regional distribution and assemblage characteristics of the multi-element background, the geotectonic and geochemical zoning is carried out. The anomalies reflect the high background of the basic elements such as FeanCuCuCo-Ni and the anomalous distribution of the middle-basic volcanic strata in this area.The distribution characteristics of elements in river sediments objectively show the level of element content and regional distribution characteristics, delineate comprehensive anomalies, and reveal the characteristics of element assemblages and enrichment laws of different causes and types of anomalies.All kinds of ore-prospecting target areas and ore-forming prospective zoning provide geochemical basis for ore prospecting in the future, large area east-west river sediment geochemical survey, small scale anomaly mapping,It can well reflect the characteristics of regional geochemistry and the regularity of regional metallogenesis, and play a very important role in solving the regional basic geological problems and the strategic deployment of regional prospecting; the method of combining geology, geochemical exploration and geophysical exploration,The advantages of rapid determination of target area by geochemical exploration and the advantages of accurate location of geological work, combined with proper surface engineering exposure, have good ore prospecting effect.On the basis of the above research, combined with the geological characteristics of the discovered deposits in the region, the metallogenic regularity of the regional deposits is summarized and the metallogenic model is established.
【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】：P595;P632

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