【作者】 李少雄；

【导师】 李树文；

【作者基本信息】 河北工程大学 ， 环境工程， 2010， 硕士

【摘要】 我国正面临资源短缺的局面,为扩大矿山潜在资源,迫切需要加强矿山深部的找矿、勘探和开发。因此,开展复杂磁异常的解释研究,可以作为寻找隐伏磁性矿体和扩大已知矿床储量的重要途径,对加快我国深部找矿战略的实施具有深远的指导意义。由于隐伏磁性矿体形态和厚度变化的不确定性,对磁异常形态的深入研究和剖析更为重要,对地面磁测数据的多手段处理和解释是揭示磁性体空间分布规律和深部变化趋势的有效途径。通过收集、整理和分析邯邢地区以往的地质、磁测和磁铁矿开采资料,了解该区的地质条件及磁异常特征,然后分析前人的工作成果,选择合适的磁异常转换与反演方法对异常进行解释研究。首先,对选定的复杂磁异常做化极、滤波和曲面延拓转换处理,分离出干扰异常,突出有用信息;其次,对转换后的磁异常作水平和垂向导数计算,突出线性构造在磁场中的反应,压制区域异常的影响,突出局部异常特征;最后,建立磁异常剖面,采用2.5D可视化技术进行剖面反演,从异常形态的细微变化上着手分析,寻找岩性组成、地质结构以及成矿带的关系,然后做出成矿预测与评价。更多还原

【Abstract】 At present,facing the situation of resource shortages,there is an urgent need to strengthen the deep mine prospecting,exploration and development for expanding the potential resources of mining.Therefore,carrying out a study of the interpretation of complex magnetic anomalies can be an important way to search for concealed ore bodies and to expand the known mineral deposits.It is also have a far-reaching significance for accelerating the strategy implementation of deep prospecting.As the uncertainty of changes for the shape and thickness of the concealed magnetite body , it is important to study and analyze the magnetic anomalies deeply.Using the method of processing and interpreting the magnetic survey data with many different ways is an effective way to reveal the spatial distribution and the changing trends in the depth of the magnetic body.Select an appropriate conversion and inversion method to interpret and study he magnetic anomalies by analyzing the results of our predecessors′work and finding out the local geological conditions and magnetic anomalies through the collection,collation and analysis of the former information of the geological condition , magnetic measurement and magnetite mining in Han-Xing region.First,separate the interference signal and highlight useful information from the selected complex magnetic anomalies with the method of doing the reduction-to-pole of magnetic data,filtering and surface extension conversion.Secondly,make horizontal and vertical derivative calculation for the converted magnetic anomalies,to highlight the linear structure response in a magnetic field,suppress the impact of regional anomalies and highlight the local anomalies. Finally,establish the anomaly profile, use 2.5D visualization technology for profiling inversion,and find the relationship among the lithological combination,geological structure and metallogenic belt through analyzing the subtle changes of anomaly shape,to make metallogenic prediction and evaluation.更多还原