磁法勘探在宿泥不浪铁矿中的应用

发布时间：2018-06-10 04:38

本文选题：磁法勘探 + 鞍山式铁矿　；参考：《吉林大学》2015年硕士论文

【摘要】：本论文是在国家推动集体制、私营制矿山开发的前提下,为了深入发掘中小型矿山的资源开采价值,对现有矿权进行整合再开发,使矿山资源有序接替而进行的。在进行鞍山式铁矿的深部勘查应用与研究的基础上,充分利用磁法勘探资料,结合基础地质工作和以往矿山开采情况,对基本属于勘查盲区的宿泥不浪铁矿进行了磁法勘探,对所采集的数据进行了定性、半定量直至定量的计算、处理、推断与解释,总结了该地区铁矿的成矿规律,圈定了找矿靶区,对同类型矿产资源的调查提供了参考。通过野外工作与综合研究,本文取得了如下认识及成果:(1)总结了宿泥不浪地区鞍山式铁矿的成矿规律与找矿特征。即斜长角闪岩作为矿体围岩,可以作为间接的找矿标志;磁异常与斜长角闪岩的磁性参数进行对比,对寻找隐伏岩体有较好的指示作用;宿泥不浪铁矿成因类型属于沉积变质铁矿床,矿体受后期变质作用影响,容易在局部地段形成富集,所以变质程度的强弱,也可以成为间接找矿标志。因此,磁测异常成为该地区铁床找矿的重要标志。(2)在宿泥不浪地区进行了面积为9.38km2的1:1000地面磁法勘探,并对磁测异常进行了多种数据处理,其中,向上延拓有效地压制了浅部干扰,突出了深部基底形态,结合垂向一阶导数、小波分析、解析信号分析等处理结果进行综合对比分析,为找矿靶区的圈定提供了依据。共圈出3个磁力异常区,分别编号为MD1、MD2和MD3,并结合地质资料,确定MD2为该矿区的找矿靶区。(3)由于研究区以往地质、地球物理和地球化学工作几乎处于空白,因此,为了进一步验证,在MD2异常位置布设了两条间距200m的平行激电中梯勘探线。分别对两条剖面进行了正演拟合,获得了矿体位置的空间展布,后经钻探验证,发现4条平行产出的盲矿体,均赋存于斜长角闪岩中,呈透镜状产出,走向均为北西向,约320°左右,倾向南西,倾角80°。(4)磁测异常数据的各项处理是异常推断解释中必不可少的重要一环,既有利于突出有用异常信息,又能便于推断解释,应从解决地质问题的实际出发,选择选择合适的数据处理方法。(5)标本、钻孔岩心的物性测量以及正演拟合的应用,对判识矿与非矿异常、矿体形态、深度和分布范围尤为重要。在钻探的过程中应对模型进行不断修正,这对钻探进程和进一步发掘资源储量具有重要意义。
[Abstract]:This paper is on the premise of promoting collective system and private mine exploitation by the state. In order to excavate the value of the resource exploitation of the medium and small mines, the existing mineral rights are integrated and redeveloped to make the mine resources orderly succeeding. On the basis of the deep exploration of the Anshan type iron mine, the exploration funds of the magnetic method are fully utilized. According to the basic geological work and the mining situation in the past, the magnetic prospecting is carried out on the slime iron ore deposit, which is basically a survey blind area. The data collected are qualitative, semi quantitative, quantitative, processed, deductive and interpreted. The metallogenic regularity of the iron ore in this area is summarized and the prospecting target area is delineated, and the same type of mineral resources are determined. The investigation of resources has provided reference. Through field work and comprehensive research, the following understanding and achievements have been obtained: (1) the metallogenic regularity and prospecting characteristics of Anshan type iron ore are summarized in the area of the non wave area, that is, the diagonal amphibolite, as the rock of the ore body, can be used as an indirect prospecting target, and magnetic anomalies and the magnetic parameters of the diagonal amphibolite are carried out. In contrast, it has a good indication for the finding of hidden rock mass, and the genesis type of the slime non wave iron mine belongs to the sedimentary metamorphic iron deposit. The ore body is influenced by the late metamorphism, it is easy to form and enrich in the local area, so the strength of the metamorphism can also be an indirect prospecting indicator. Therefore, the magnetic anomaly becomes the important mark of the iron bed prospecting in this area. (2) 1:1000 surface magnetic prospecting with area of 9.38km2 was carried out in the non wave area of the mud and mud, and a variety of data processing were carried out on the magnetic anomaly. Among them, the shallow interference was effectively suppressed by the upward extension, the shape of the deep basement was highlighted, the results of the vertical first derivative, the wavelet analysis, the analytic signal analysis and other processing results were combined. It provides a basis for the delineation of the prospecting target area. A total of 3 abnormal magnetic fields were circled, numbered MD1, MD2 and MD3, and the geological data were used to determine the MD2 as the target area for the mining area. (3) the geophysical and geochemical work was almost blank because of the previous geology of the study area. Therefore, in order to further verify, it was laid out in the abnormal position of MD2. Two parallel excitation intermediate ladder exploration lines with distance of 200m, two sections are fitted, and the spatial distribution of the position of the ore body is obtained. After the drilling and verification, 4 parallel output blind ore bodies are found in the diagonal amphibolite, showing a lens like output, the direction is about 320 degrees, tending to South West and 80 degrees (4). The treatment of magnetic anomaly data is an essential part of abnormal inference interpretation. It is not only conducive to the outburst of useful abnormal information, but also easy to deduce and explain. It is necessary to choose the appropriate data processing method from the practice of solving the geological problems. (5) the specimen, the physical measurement of drilling Kong Yanxin and the application of forward fitting, should be judged. The form, depth and distribution of ore bodies are of particular importance. In the process of drilling, the model should be constantly revised, which is of great significance to the drilling process and to further excavate the reserves of resources.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P631.2

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