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《Progress in Geophysics》 2008-05
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The correlation method for gravity anomaly separation

GUO Liang-hui1,2,3,MENG Xiao-hong1,3,SHI Lei1,ZHANG Guo-li4(1.Key Laboratory of Geo-detection(China University of Geosciences,Beijing),Ministry of Education,Beijing 100083,China;2.CAS Key Laboratory of Marginal Sea Geology,South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 510301,China;3.State Key laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Beijing 100083,China; 4.Tianjin institute of geology and mineral resources,Tianjin 300170,China)  
The correlation method separates the observed gravity anomaly into two parts,the regional anomaly approximated by the polynomial equation of the observed stations′ coordinates,and the residual anomaly calculated by subtracting the observed anomaly from the regional anomaly,based on the goal of maximizing the correlation between the depth of the targeted density interface and the residual anomaly.The above maximization goal can be written as a least squares equation and be solved iteratively by the linear or nonlinear optimization algorithm to get the polynomial coefficients,which can be used to approximate the regional anomaly and subsequently calculate the residual anomaly in the whole area.The test on the synthetic gravity anomaly shows that the correlation method separates the gravity anomaly effectively with good results.
【Fund】: 国家863计划课题(2006AA06Z111、2006AA06A201-3、2006AA09A101-0201-3);; 中国科学院边缘海地质重点实验室基金(MS-GL0707);; 地质过程与矿产资源国家重点实验室开放课题(GPMR0733)联合资助
【CateGory Index】: P631.1
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