Ratio-Euler deconvolution and its applications

Euler deconvolution of potential field data is widely applied to obtain the location of concealed sources automatically. A lot of improvements have been proposed to eliminate the dependence of Euler deconvolution on the structural index that are based on the use of high-order derivatives of the potential field and, therefore, sensitive to data noise. We describe the elimination of the dependence on the Ratio-Euler method, which is based on the original Euler deconvolution function. The proposed method does not involve high-order derivatives. Testing on simulated and field data indicates that the proposed method has better noise resistance than the existing Tilt-Euler method, which is based on high-order derivatives. The proposed method is first applied to the ground magnetic data from Weigang iron deposit, Eastern China. It reveals that the ore body could be approximated by a horizontal prism with a considerable vertical extent with a top depth of 55 m, which are very close to the information obtained from drill holes. In addition, the proposed method works well in estimating the depth to a cavity centre from the ground gravity anomaly.