2.5D重力双重加权聚焦反演及其应用  

2. 5D dual-weight focusing inversion of gravity and its application

作　　者：孙瑞雪[1] 杜晓娟[1] 梁全有[1] 

机构地区：[1]吉林大学地球探测科学与技术学院,长春130026

出　　处：《世界地质》2014年第3期653-658,共6页World Geology

基　　金：国家科技支撑计划项目(2009BAB43B00)

摘　　要：针对聚焦反演方法在实测数据应用中存在的趋肤效应和反演结果发散问题,设计应用深度加权和数据加权的双重加权系数灵敏度矩阵,进行核函数处理。通过反演拟合理论正演模型实验,证明了该方法的可靠性。将双重加权系数运用到山东某矿区的实测数据,反演结果清晰地反映出地下异常体的边界和深度,与剖面电阻率结果比较,两者异常位置接近,该方法可反应实际异常情况。Aiming at the problems such as skin effect of imaging and divergence of anomalous source for focu sing inversion in the practical application,the authors designed sensitivity matrix with double weighted coefficients including depth-and data weights in order to deal kernel function.By fitting inversion theoretical forward model experiments,it is proved that the method is of reliability.The double weighting factors were applied to the practical data of a mine in Shandong,in which the inversion results clearly reflect the boundaries and depth of underground anomalies.Compared with the results of the cross-section resistivity,the both are close in abnormal positions.The method can reflect the actual anomalies.

关 键 词：重力 双重加权 2.5维反演 聚焦反演 

分 类 号：P631.12[天文地球—地质矿产勘探]