重力资料聚焦反演成像改进及其应用  

Focusing inversion image improvement and application of gravity data

作　　者：栗学磊[1] 李文成[2] 王凤刚[2] 王俊山[2] 刘蒙恩[2] 

机构地区：[1]吉林大学地球探测科学与技术学院,长春130026 [2]首钢地质勘查院地质研究所,北京100144

出　　处：《世界地质》2013年第2期366-371,共6页World Geology

基　　金：国家科技支撑计划项目(2009BAB43B00)

摘　　要：聚焦反演在实际应用中面临着两个问题需要及时解决:成像的趋肤效应和异常体的过度聚合。利用指数深度加权函数来约束聚焦反演可以克服趋肤效应。结果表明,深度加权可以很好地限制过多异常源在地表的聚合。对于异常体的过度聚合,本文提出了异常源外扩方法,该方法将超出限制的异常源进行向异常体外的迭代式扩充。实验表明,异常体外扩方法成像效果优于常规的异常源截除方法。In practical application of focusing inversion,there are two problems need to be solved in time： the skin effect of imaging and excessive convergency of anomalous source.Skin effect problem can be solved by restraining focusing inversion using index depth weight function.The results show that the depth weight method does well in limiting the convergency of too much anomalous sources in the surface.In order to control the excessive convergency of the anomalous sources,the authors proposed the expansion of anomalous source method which makes the remnant anomalous sources expand out of the anomalous body iteratively.The experimental results indicate that the imaging effect using expansion of anomalous source method was much better than that by using conventional chopping of anomalous sources.

关 键 词：聚焦反演 深度加权 异常源外扩 二度体反演 二度半体反演 

分 类 号：P631.1[天文地球—地质矿产勘探]