磁异常的分形机制研究及应用  

Fractal mechanism of aeromagnetic anomaly and its application.

作　　者：吴小羊[1] 习宇飞[1] 程旭[1] 张恒磊[1] 

机构地区：[1]中国地质大学地球物理与空间信息学院,湖北武汉430074

出　　处：《勘探地球物理进展》2005年第6期404-407,412,共5页Progress in Exploration Geophysics

摘　　要：通过对垂直磁化直立矩形柱体模型的理论分析和推导,建立了模型并进行了正演模拟计算,分析了磁异常 分形的地质地球物理意义。分析认为磁异常具有分形结构,分维值与浅源磁化率分布有关,并受其埋深、延深等 几何因素的影响。计算了内蒙古巴彦浩特盆地航磁异常的分维数,结果表明分形能突出异常特征,更好地对岩 性进行描述。This paper investigated the geological and geophysical meanings of fractals of aeromagnetic anomalies based on forward modeling on erect magnetized rectangular column model. It was showed that the fractal characteristics of magnetic anomaly reflects the variations of physical factors of subsurface magnetic source, and is affected by the burying depth and extending depth of the source. The fractal dimension of aeromagnetic data from Bayanhaote basin was calculated and used for highlight and description of lithology.

关 键 词：航磁异常 分形 分维数 物性因素 几何因素 

分 类 号：P631.445[天文地球—地质矿产勘探]