3D correlation tomography inversion of gravity anomalies constrained by edge features and depth weighting
Correlation tomography is a fast tomography method using correlation coefficients to qualitatively interpret the spatial posi-tions of geobodies.This method,featuring simple,stable,and fast calculations,can quickly and efficiently obtain the distribution of subsurface anomalies without solving large equations.However,the results of direct correlation tomography of gravity anomalies display deep divergence,excessive depth weighting function parameters,and low lateral and vertical resolution between anomalies.According to the fundamental principle of 3D correlation tomography inversion of gravity anomalies,this study introduced the balanced vertical de-rivative and balanced analytic signal amplitude of gravity anomalies as the edge features to horizontally weight the gravity anomaly corre-lation tomography,and proposed a more concise depth weighting function.As demonstrated by model tests,the lateral resolution of cor-relation tomography was improved under the constraint of gravity anomaly edge features,and the vertical resolution of correlation tomo-graphy was enhanced using the new depth weighting function.Finally,the method in this study was applied to the actual data of the Australian Olympic Dam polymetallic deposit,yielding consistent weighted tomography results with the actual geological data,thus pro-ving the correctness and effectiveness of the method.
gravity anomalycorrelation tomographyhorizontal weightingdepth weightingedge features
万方数据
维普
