A--自适应重磁对应分析.docVIP

 PAGE \* MERGEFORMAT 13 自适应重磁对应分析 范正国，刘前坤，黄旭钊，张洪瑞，周道卿，杨雪，谭林 中国国土资源航空物探遥感中心 ，北京，100083 摘要:采用传统重磁对应分析数据处理方法，计算了单体模型和三体模型条件下重磁异常的相关系数。结果显示：重磁异常中心区域的相关系数绝对值在重磁异常重合时为1、否则小于1（能指示重磁异常是否相关），在远离异常源或无重磁异常地区的相关系数绝对值不论重磁异常是否重合都趋于1（没有实际意义）。鉴于此，笔者提出了自适应重磁对应分析方法，并在晋冀北缘－辽西铁矿成矿带进行了2种方法的对比应用试验，结果表明：在滦南、司家营南部、马城等重磁异常完全重合的地区，2种数据处理方法的处理结果都表明为重磁正相关地区；在新集以东、小马庄西南部、石门东北部等重磁异常不完全重合或根本没有重磁局部异常??地区，传统重磁对应分析数据处理方法的处理结果也显示为正相关地区，自适应重磁对应分析数据处理方法的处理结果没有相关数据点或异常。 关键词：重力异常；航磁异常；对应分析；自适应；铁矿 Adaptive Correlative Analysis Between Aeromagnetic and Gravity Anomaly Fan Zheng-guo, Liu Qian-kun, Huang Xu-zhao, Zhang Hong-rui, Zhou Dao-qing, Yang Xue, Tan Lin China Aero Geophysical Survey and Remote Sensing Center for Land and Resoures, Beijing,100083 Abstract: By using the previous correlation analysis of aeromagnetic and gravity anomaly，the characteristic of correlation coefficient has been studied over single model and three models. The correlation coefficient absolute value in gravity and magnetic anomaly regional center is equal to 1. when gravity and magnetic anomalies coincide, or less than 1. The correlation coefficient absolute value away from the gravity and magnetic anomaly is always close to 1. It not only makes no sense but also gives an illusion away from the fidld. Therefore the adaptive correlation analysis is put forward. Two methods were applied to from northern margin of Shanxi and Hebei to Western Liaoning metallogenic belt. The results demonstrate that gravity and magnetic anomalies coincide and are related in Luannan, Macheng and Southern Sijiaying region by using these two methods, but the results are still shown as related in East Xinji, Southern Xiaomazhuang, Northeastern Shimen which gravity and magnetic anomalies do not completely overlap or no abnormal area by using the previous method and these results dont appear by using the adaptive correlation analysis. Key word: gravity anomaly；aeromagnetic anomaly；correlation analysis；adaptive correlation analysis；iron deposit 收稿日