西准谢米斯台岛弧带火山岩型（铜铁金）矿床综合找矿模型探讨

发布时间：2018-02-21 05:42

本文关键词： 谢米斯台西准噶尔综合找矿模型火山岩型典型矿床找矿靶区　出处：《新疆大学》2017年硕士论文　论文类型：学位论文

【摘要】：研究区位于新疆西准噶尔西北部谢米斯台岛弧带。晚古生代火山活动时间长,活动强度强,分布面广。因此,该区火山岩厚度大,岩性复杂,具有良好的地质成矿条件。研究区内矿产资源丰富,尤其是铜铁金矿。但随着找矿难度的增大,传统的找矿手段未能满足复杂地质条件下找矿的需要,所以进行综合找矿方法具有重要意义。针对研究区内矿产勘查的需要,本文在研究区范围内选取阿尔木强火山岩型铜矿为典型矿床,综合运用地、物、化、遥等现代勘查技术和手段,全面系统地研究阿尔木强铜矿各种有利成矿条件,找矿标志,在此基础上建立综合找矿模型。最后,在综合找矿模型的基础上在研究区内圈定找矿靶区。具体工作与成果如下:(1)通过1∶10000地面高精度磁法面积测量提取了磁异常信息,通过激电极化法提取了地球物理激电异常并做出相关图件。(2)利用谢米斯台地区1:5万土壤地球化学数据,运用T=X+1.5S计算异常下限的参考值并确定Cr、Co、Ni、Cu、As、Ag、Cd、Sb、Au、Hg等元素的异常下限,通过多元统计方法(相关分析、聚类分析等)研究矿区内各元素的分布富集特征及共生组合规律,确定地球化学异常找矿标志。然后利用处理好的地球化学数据在surfer软件上绘出了单元素、组合元素地球化学异常图。(3)利用及处理landsat8OIL数据,通过主成分分析法进行矿化蚀变信息提取,获取了羟基、铁染蚀变分布图。通过Landsat-8OLI影像741波段获得研究区的合成彩色影像,与其结合1:1万矿区地质图进行目视解译,获得了典型矿床阿尔木强铜矿的遥感解译线性环形构造图。(4)阿尔木强火山岩型铜矿区域地质背景、区域地球物理场、地球化学场特征、矿区地球物理、地球化学、遥感异常信息特征及矿床地质特征、控矿因素及找矿标志基础上建立阿尔木强火山岩型铜矿床综合找矿模型。(5)据阿尔木强火山岩型铜矿床综合找矿模型的基础上,利用1:5万地质、高精度磁测、土壤地球化学测量,1:1万激电剖面、磁剖面以及遥感信息提取等方法圈定一个乙1级异常靶区(1区),地表矿化特征与阿尔木强小型铜矿类似,成矿条件较好,是成矿远景区内寻找陆相火山岩型铜金矿较好的靶区,具有良好的找矿前景。
[Abstract]:The study area is located in the Shemisi island arc zone in the northwest part of Xinjiang. The late Paleozoic volcanoes were active for a long time, strong activity intensity and wide distribution. Therefore, the volcanic rocks in this area are very thick and complicated in lithology. The study area is rich in mineral resources, especially copper, iron and gold deposits. But with the increasing difficulty of prospecting, the traditional prospecting methods can not meet the needs of prospecting under complex geological conditions. Therefore, it is of great significance to carry out comprehensive prospecting methods. In view of the needs of mineral exploration in the study area, this paper selects Almu-strong volcanic type copper deposit as a typical deposit in the study area. This paper studies comprehensively and systematically all kinds of favorable metallogenic conditions and prospecting markers of Almuqiang Copper Mine by means of remote exploration techniques and methods, and establishes a comprehensive prospecting model on this basis. On the basis of the comprehensive prospecting model, the prospecting target area is delineated in the study area. The concrete work and results are as follows: 1) the magnetic anomaly information is extracted by measuring the surface area of 1: 10000 high precision magnetic method. Geophysical induced anomalies were extracted by the method of induced polarization and related maps were made. (2) based on the geochemistry data of 1: 50 000 soils in the Shemishitai area, the reference values of the lower limit of the anomalies were calculated by using TX 1.5S and the anomalous lower limits of elements such as CrCoCoC NiNiCU, AsAsAsAsCU, CDB, SbHG and so on were determined. By means of multivariate statistical method (correlation analysis, cluster analysis, etc.), the distribution and enrichment characteristics and symbiotic combination law of each element in the mining area are studied. Then the single element and combined element geochemical anomaly map on surfer software are drawn by using the processed geochemical data, and the landsat8OIL data are used and processed. Principal component analysis (PCA) was used to extract the mineralized alteration information, and the distribution of hydroxyl and iron-stained alteration was obtained. The composite color image of the study area was obtained by using Landsat-8OLI image at 741-band, and the visual interpretation was carried out by combining with the geological map of the mining area of 10: 10, 000. The remote sensing interpretation of Almuqiang copper deposit is obtained. The regional geological background, regional geophysical field, geochemical field, geophysics and geochemistry of Almu-strong volcanic type copper deposit are obtained. Based on the characteristics of remote sensing anomaly information and geological characteristics of deposits, ore-controlling factors and ore-prospecting indicators, a comprehensive prospecting model for Almu-strong volcanic copper deposits is established, which is based on the comprehensive prospecting model of Almu-strong volcanic copper deposits. Using 1: 50 000 geology, high precision magnetic survey, soil geochemistry survey 1: 10 000 IP profile, magnetic profile and remote sensing information extraction, etc., delineate a class B 1 anomaly target area. The surface mineralization characteristics are similar to that of Almuqiang small copper deposit. The ore-forming condition is good, and it is a good target area for prospecting continental volcanic rock type copper and gold deposit in the metallogenic area, which has a good prospecting prospect.
【学位授予单位】：新疆大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.2

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