自适应重磁对应分析  

Adaptive Correlative Analysis Between Aeromagnetic and Gravity Anomaly

作　　者：范正国[1] 刘前坤[1] 黄旭钊[1] 张洪瑞[1] 周道卿[1] 杨雪[1] 谭林[1] 

机构地区：[1]中国国土资源航空物探遥感中心,北京100083

出　　处：《吉林大学学报（地球科学版）》2012年第6期1903-1911,1919,共10页Journal of Jilin University：Earth Science Edition

基　　金：中国地质大调查项目(1212010913037)

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的地区,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。By using the correlation analysis of aeromagnetic and gravity anomaly,the characteristic of correlation coefficient has been estimated over single and three abnormal models.The absolute value of correlation coefficient at the center of gravity and magnetic anomaly regional is equal to 1 when gravity and magnetic anomalies coincide,otherwise less than 1.However,where thare no gravity and magnetic anomaly,the absolute value of correlation coefficient can also approach 1.In this case,the correlation coefficient not only makes no sense but also gives an illusion away from the field.Therefore,the adaptive correlation analysis is developed.The adaptive and traditional correlation analysis methods have been applied to northern margin of Shanxi and Hebei to western Liaoning metallogenic belt,both revealing the gravity and magnetic anomalies in Luannan,Macheng and southern Sijiaying region.In east Xinji,southwestern Xiaomazhuang,northeastern Shimen,there are no gravity and magnetic anomalies,which is also confirmed by the adaptive correlation analysis.However,the traditional method shows the abnormal.

关 键 词：重力异常 航磁异常 对应分析 自适应 铁矿 

分 类 号：P631[天文地球—地质矿产勘探]