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本文总结了基于磁异常频谱特征反演居里面的基本理论和方法,分析了磁性体场源满足随机分布及分形分布两种假设下的磁异常频谱特征及其对数径向能谱与磁性体场源埋深之间的关系,并给出居里面埋深估计的方法.基于以上方法对华北地区磁异常数据进行分析并计算了相应的磁性体场源埋深,实际计算表明,基于磁性体场源随机分布假设的居里面深度计算结果与该地区地热结构有良好的对应关系.实际数据处理的结果验证了这些方法的可靠性和实用性.估算居里面深度的两种不同方法适用于不同的地质模型,实际应用应结合区域磁异常源分布的特点,以获取合理的居里面深度估计值.
This paper summarizes the basic theory and method of inversing CIMS based on spectral features of magnetic anomalies, and analyzes the magnetic anomalies spectrum characteristics and their logarithmic-radial energy spectra and magnetic properties under the assumption of magnetic field sources satisfying random distribution and fractal distribution Based on the above method to analyze the data of magnetic anomalies in North China and calculate the corresponding buried depth of the magnetic field source, the actual calculations show that based on the magnetic body The calculation results of depth of in-depth random distribution of field sources have a good correspondence with the geothermal structure in this area.The results of actual data processing verify the reliability and practicability of these methods.The two different methods to estimate the depth of in-depth are suitable for different The practical application of this model should be based on the characteristics of the regional distribution of magnetic anomalies to obtain a reasonable estimate of the depth of in-core.