精细反演计算在镇江五洲山磁异常再解释中的应用  

Application of fine inversion in the reinterpretation of Wuzhoushan magnetic anomaly in Zhenjiang

作　　者：张作宏[1] 魏邦顺[2] 张大莲[2] 张焓[3] 

机构地区：[1]江苏省地质勘查技术院,江苏南京210049 [2]江苏省地质调查研究院,江苏南京210018 [3]南京信息工程大学,江苏南京210044

出　　处：《地质学刊》2016年第4期653-661,共9页Journal of Geology

基　　金：中国地质调查局项目"镇江宝华山-巫岗地区铁铜矿远景调查"(1212011085433)

摘　　要：江苏镇江五洲山地区存在多个磁异常,通过对该地区地质背景、地磁场特征的分析研究,结合数据处理技术对DC-19异常开展了二维小波多尺度分解、三维物性反演以及2.5维剖面反演等精细处理计算。结果表明,矿孔的深部、旁侧还存在较大规模的磁铁矿体,认为该地区具有较好的寻找矽卡岩型磁铁矿的前景。说明利用计算技术,通过精细反演可进一步深化对以往异常的认识,达到重新评价异常的目的。There are multiple magnetic anomalies in the Wuzhoushan area of Zhenjiang in Jinagsu Province. This work analyzed the geological setting and magnetic field characteristics of this area, and utilized modem advanced data processing techniques to conduct two-dimensional multi-scale wavelet decomposition, three-dimensional physical property inversion and 2.5 dimentional profile inversion of the anomaly DC-19. The result shows that there are large-scale magnetite orebodies in the deep and flanking positions of boreholes ZK301 and ZK304, indicating a good potential for prospecting skarn type magnetite ores. It is revealed that fine inversion based on modem advanced computing technologies can further deepen the previous understanding on anomalies and can also reevaluate those anomalies.

关 键 词：地质背景 地磁异常特征 小波分解 三维物性反演 2.5维反演 再解释 江苏镇江 

分 类 号：P631.24[天文地球—地质矿产勘探]