Application Effect Analysis of Magnetic Gradients Data Continuation from Undulate Surface to Plane

Abstract:

Application effect of magnetic gradients data continuation from undulate surface to plane has been analyzed by model test. The gradient data of before and after the processing was used for the analytic signal and the Euler deconvolution method calculation respectively, comparing the calculated results show that the maxima of analytic signal calculated by gradients anomaly on undulate surface deviate obviously from the center location of the prism magnetic source, and the position of prism boundaries are not clear. However, the analytic signal calculated by gradients anomaly after continuation from undulate surface to plane can be successfully used to estimate the center and boundaries position of prism. The solutions of Euler deconvolution method calculated by gradients anomaly on undulate surface are dispersive, the solutions calculated by gradients anomaly after continuation from undulate surface to plane are relatively clustering, and can outline clearly the positions of prism corners. The results demonstrate that continuation from undulate surface to plane processing of gradients anomaly can improve the application effect of analytic signal and Euler deconvolution technique.

• Periodical: Advanced Materials Research (Volumes 779-780)
• Pages: 643-646
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.779-780.643
• Online since: September 2013
• Authors: Hai Xia Li, Hai Long Yu, Xiao Ling Zhang
• Keywords: Analytic Signal, Continuation from Undulate Surface to Plane, Euler Deconvolution Technique, Interpolation-Iterative Method, Magnetic Gradients

References

[1] R. L. Scott Hogg Practicalities, pitfalls and new developments in airborne magnetic gradiometry, Annual Meeting of the Prospectors & Developers Association of Canada, (2004).

DOI: 10.3997/1365-2397.22.7.25952

[2] M. N. Nabighian, The analytic signal of two-dimensional magnetic bodies with polygonal cross section: its properties and use for automated anomaly interpretation, Geophysics, 37(1972) 507-517.

DOI: 10.1190/1.1440276

[3] W. R. Roest, J. Verhoef, M. Pilkington, Magnetic interpretation using the 3-D analytic signal, Geophysics, 57(1992)116-125.

DOI: 10.1190/1.1443174

[4] D. T. Thompson, EULDPH: A new technique for making computer-assisted depth estimates from magnetic data, Geophysics, 47 (1982) 31-37.

DOI: 10.1190/1.1441278

[5] A. B. Reid, J. M. Allsop, H. Granser, et al. Magnetic interpretation in three dimensions using Euler deconvolution, Geophysics, 55(1990) 80-91.

DOI: 10.1190/1.1442774

[6] D. Gerovska, P. Stavrev, M. J. Araúzo-Bravo, Finite-difference Euler deconvolution algorithm applied to the interpretation of magnetic data from Northern Bulgaria, Pure and Applied Geophysics, 162(2005) 591-608.

DOI: 10.1007/s00024-004-2623-1

[7] S. Z. Xu, H. L. Yu, The interpolation-iterative continuation method for potential field continuation from undulating surface to plane, Chinese J. Geophys. (in Chinese) , 50(2007) 1811-1815.

DOI: 10.1002/cjg2.1176