Calculation of Moho Depth by Gravity Anomalies in Qinghai–Tibet Plateau Based on an Improved Iteration of Parker–Oldenburg Inversion

详细信息    查看全文

• 作者：Chong Zhang ; Danian Huang ; Guochao Wu ; Guoqing Ma ; Yuan Yuan…
• 关键词：3D gravity inversion ; density interface ; Moho depth ; Qinghai–Tibet Plateau
• 刊名：Pure and Applied Geophysics
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：172
• 期：10
• 页码：2657-2668
• 全文大小：9,146 KB
• 参考文献：Bhaskara Rao, D., Rameshbabu, N., A rapid method for three-dimensional modeling of magnetic anomalies. Geophysics, 56 (11), 1729-737.
  Blakely , R.J., Potential theory in gravity and magnetic applications (CAMBRIDGE UNIVERSITY PRESS, Cambridge 1995) pp. 146-48 and pp. 214-10.
  Cordell , L., Henderson , R.G., Iterative three-dimensional solution of gravity anomaly data suing a digital computer. Geophysics, 38 (4), 596-01.
  David, G.O., Bhrigu, N.P.A. (2005), 3DINVER.M:a MATLAB program to invert the gravity anomaly over a 3D horizontal density interface by Parker-Oldenburg’s algorithm, Computers & Geosciences. 31 (2005), 513-20.
  Granser , H. (1986), Convergence of iterative gravity inversion, Geophysics, VOL. 51, 1146-147.
  Gubbins , D., Time series analysis and inverse theory for geophysicists (CAMBRIDGE UNIVERSITY PRESS, Cambridge 2004).
  Guspi , F. (1993), Noniterative nonlinear gravity inversion, Geophysics, VOL. 58, 935-40.
  Liu, D.J., Hong , T.Q., and etc. (2009), Wave number domain iteration for downward continuation of potential fields and its conbergence, Chinese JOURNAL OF GEOPHYSICS (in Chinese), 52(6), 1599-605.
  Menke , W., Geophysical data analysis: discrete inverse theory (ACADEMIC PRESS, Orlando 1984).
  Oldenburg , D.W. (1974), The inversion and interpretation of gravity anomalies, Geophysics, VOL.39, 526-36.
  Parker , R.L. (1973), The Rapid Calculation of Potential Anomalies, Geophys. J. R. 31, 447-55.
  Pilkington , M. (2006), Joint inversion of gravity and magnetic data for two-layer models, Geophysics, VOL. 71, L35–L42.
  Reamer, S.K., and Ferguson, J.F. (1989), Regularized two-dimensional Fourier gravity inversion method with application to the Silent Canyon caldera, Nevada, Geophysics, VOL. 54, 486-96.
  Tsuboi, C., Gravity (George Allen & Unwin Ltd, London 1983) pp. 254.
  Xiao, P.F., Chen, S .C., and etc. (2007), The density interface inversion of high-precision gravity data, Geophysical & Geochemical Exploration (in Chinese), 31, 1, 29-3.
  Xu , S.Z. (2006), The integral-iteration method for continuation of potential fields, CHINESE JOURNAL OF GEOPHYSICS (in Chinese), 49(4), 1176-182.
  Zhang, H., Chen , L.W., and etc. (2009), Analysis on convergence of iteration method for potential fields downward continuation and research on robust downward continuation method, CHINESE JOURNAL OF GEOPHYSICS (in Chinese), 52(4), 1107-113.
  Zhdanov , M.S., Geophysical inverse theory and regularization problems (Elsevier Science, Netherlands 2002).
  
• 作者单位：Chong Zhang (1)
  Danian Huang (1)
  Guochao Wu (1)
  Guoqing Ma (1)
  Yuan Yuan (1)
  Ping Yu (1)
  
  1. College of Geo-Exploration Science and Technology, Jilin University, Changchun, 130026, China
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Geophysics and Geodesy
  
• 出版者：Birkh盲user Basel
• ISSN：1420-9136

文摘

A derivative formula for interface inversion using gravity anomalies, combining the Parker–Oldenburg method for calculating and inverting gravity anomalies with Xu’s iteration method for continuing potential fields, leads to a convergent inversion algorithm and an optimally located density interface geometry. In this algorithm, no filtering or any other convergence control techniques are needed during iteration. The method readily iterates the variable depth of the gravity interface by means of upward continuation in a form equivalent to inversion iteration in the Fourier domain instead of the divergent, downward continuation term. This iteration algorithm not only efficiently solves the divergence problem in the inversion iteration procedure but also validly obtains an excellent result for the density interface. A numerical example is presented to illustrate perfect execution of this approach in gravity exploration, and a real geophysical example of inversion of the Moho depth by means of this approach using a set of measured gravity anomalies over the Qinghai–Tibet Plateau in China is offered. Keywords 3D gravity inversion density interface Moho depth Qinghai–Tibet Plateau