内蒙古自治区阿拉善地区航磁异常查证研究

发布时间：2018-02-14 11:25

本文关键词： 航磁异常查证高精度磁法勘探综合剖面测量铁矿　出处：《石家庄经济学院》2015年硕士论文　论文类型：学位论文

【摘要】：本文主要介绍了地球物理勘探方法在内蒙古阿拉善地区航磁异常查证方面的应用。本次查证区由两个分区组成,分别为阿拉善左旗的72-124、125、126航磁异常查证区和阿拉善右旗的72-193航磁异常查证区,面积分别为36.12km2、39.25km2。本次查证的目的是为了复核航磁异常的位置,进一步圈定地面高精度磁法测量范围,研究异常分布特征;通过对磁异常的定性和定量解释,初步了解引起异常磁性体的性质、规模、埋深、产状;采用钻探工程对异常进行深部验证,查明引起异常的原因。在寻找铁矿床的同时,注意寻找与弱磁性地质体和基性、超基性岩有关的多金属矿产;对矿致异常的含矿性及矿(化)体规模进行大致控制,为进一步工作提供依据。通过在该区进行野外踏勘及区内资料的收集工作,了解了工作区的地质概况、地球物理特征及航磁异常特征。查证方法主要采用高精度磁法测量并辅以激电中梯剖面测量、激电测深,并应用钻探进行钻孔验证。野外施工设计了1:1万高精度磁法测量75.37km2、1:2000磁测剖面20km、1:5000地质物探综合剖面30km、钻探1013.85m,并获取钻孔原生晕样103件。本次航磁异常查证工作共圈定六个地磁异常区,复核了航磁异常区的存在,并对异常数据进行了数据处理及解译推断。配合钻探验证,推断出区内的高磁异常是由蚀变岩类和变质岩类引起。原推测引起磁异常的铁矿床和与弱磁性有关的地质体以及基性、超基性岩有关的多金属矿产存在的可能性不大。
[Abstract]:This paper mainly introduces the application of geophysical exploration method in the investigation of aeromagnetic anomalies in Alashan area, Inner Mongolia. The area of 72-124Flag and 72-193 aeromagnetic anomaly verification area of Alashan left Banner and Alashan right Banner, respectively, are 36.12km2, 39.25km2. The purpose of this investigation is to check the position of aeromagnetic anomaly and to further delineate the measuring range of surface high precision magnetic method. Through qualitative and quantitative interpretation of the magnetic anomalies, the properties, scale, depth and occurrence of the abnormal magnetic bodies are preliminarily understood, and the deep anomalies are verified by drilling engineering. To find out the causes of anomalies. While looking for iron ore deposits, attention should be paid to the exploration of polymetallic minerals related to weak magnetic geological bodies and basic and ultrabasic rocks, and to the general control of the ore-bearing characteristics of ore anomalies and the scale of ore-bodies (ore-bodies). To provide the basis for further work. Through the field survey in the area and the collection of data in the area, the geological profile of the work area has been understood. Geophysical characteristics and aeromagnetic anomalies. The verification methods are mainly measured by high precision magnetic method and supplemented by the profile measurement of the middle step of IP. In the field construction, the magnetic survey of 75.37 km ~ 2 ~ 2 ~ 1% ~ 1: 2000 magnetic section 20 km ~ 1: 5 000 geophysical comprehensive section 30 km, drilling 1013.85 m, and 103 primary halo samples of borehole were designed. The aeromagnetic anomaly verification work was carried out in a total circle. Determine six geomagnetic anomaly areas, The existence of aeromagnetic anomaly area is checked, and the abnormal data are processed and interpreted and inferred. It is inferred that the high magnetic anomalies in the area are caused by altered rocks and metamorphic rocks.
【学位授予单位】：石家庄经济学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P631.222

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