地球物理方法在舞钢铁矿田勘探中的应用研究

发布时间：2018-02-23 23:43

本文关键词： 舞钢铁矿田地球物理 CSAMT 高精度磁法重力　出处：《中国地质大学(北京)》2015年硕士论文　论文类型：学位论文

【摘要】：铁矿资源是保障国民经济和国防建设的重要基础,铁矿资源的短缺已经严重制约着我国钢铁企业和钢铁工业的发展。河南省是铁矿资源较为缺乏的省份之一,但是随着河南省经济建设的日新月异,更加凸显出铁矿资源的匮乏。舞钢铁矿田是我省最重要的铁矿资源基地,但是浅表铁矿资源已经开采殆尽,深部找矿将是未来的发展方向。本文立足于我省的铁矿勘查现状和舞钢铁矿田急需解决的问题,利用地球物理找矿方法结合地质规律对舞钢铁矿田几个最重要的矿床进行深入研究,总结了舞钢铁矿田各种地球物理找矿方法的可行性,并对其有效性进行了评价,优选出了在舞钢铁矿田进行深部找矿的地球物理找矿方法组合,为下一步整装勘查提供了技术支持。取得的主要认识和成果如下:1、根据以往舞钢地区所开展的航磁和区域重力工作,总结出了舞钢地区航磁和重力异常特征。2、对舞钢铁矿田几个重要的矿床进行了大量的物性标本测试,总结了舞钢铁矿田铁矿及围岩的电性、磁性以及密度特征,为进一步在该区域找矿打下了坚实的基础。3、在舞钢地区航磁异常特征和重力异常特征以及物性参数特征的共同指导下,利用高精度磁法、高精度重力、可控源音频大地电磁测深以及瞬变电磁测深等方法对舞钢铁矿田内几个重要的铁矿床进行地球物理找矿方法综合找矿评价,通过综合地球物理方法组合试验我们遴选出了舞钢铁矿田有效的勘探组合方法,即高精度磁测、重力勘探及可控源音频大地电磁法。
[Abstract]:Iron ore resource is an important foundation to guarantee national economy and national defense construction. The shortage of iron ore resource has seriously restricted the development of iron and steel enterprises and iron industry in our country. Henan Province is one of the provinces lacking iron ore resources. However, with the rapid development of economic construction in Henan Province, the shortage of iron ore resources has become even more prominent. The iron ore field in Wugang is the most important iron ore resource base in our province, but the superficial iron ore resources have been exhausted. Deep prospecting will be the development direction in the future. This paper is based on the present situation of iron ore exploration in our province and the problems urgently needed to be solved in the iron ore field of Wuyang Iron and Steel Co., Ltd. Based on the geophysical prospecting method combined with geological law, this paper makes an in-depth study on some of the most important deposits in the iron ore field of Wugang Iron Mine, summarizes the feasibility of various geophysical prospecting methods in the iron ore field of Wugang Iron Mine, and evaluates its effectiveness. The combination of geophysical prospecting methods for deep prospecting in the iron ore field of Wugang is selected. It provides technical support for the next step of the complete equipment exploration. The main knowledge and results obtained are as follows: 1. According to the aeromagnetic and regional gravity work carried out in the previous Wugang area, The characteristics of aeromagnetic and gravity anomalies in Wugang area are summarized. A large number of physical properties of several important ore deposits in Wugang iron ore field are tested, and the electrical, magnetic and density characteristics of iron ore deposit and surrounding rock in Wugang iron ore field are summarized. It lays a solid foundation for further prospecting in this area. Under the guidance of aeromagnetic anomaly, gravity anomaly and physical parameters in Wugang area, the high-precision magnetic method is used for high-precision gravity. Several important iron ore deposits in Wugang iron ore field are comprehensively evaluated by means of controllable source audio magnetotelluric sounding and transient electromagnetic sounding. Through the combination test of comprehensive geophysical method, we have selected the effective exploration combination methods of Wugang iron mine field, that is, high-precision magnetic survey, gravity exploration and controllable source audio magnetotelluric method.
【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】：P631;P618.31

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