Volume 36 Issue 2
Mar.  2011
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CHEN Jian-guo, XIAO Fan, CHANG Tao, 2011. Gravity and Magnetic Anomaly Separation Based on Bidimensional Empirical Mode Decomposition. Earth Science, 36(2): 327-335. doi: 10.3799/dqkx.2011.034
Citation: CHEN Jian-guo, XIAO Fan, CHANG Tao, 2011. Gravity and Magnetic Anomaly Separation Based on Bidimensional Empirical Mode Decomposition. Earth Science, 36(2): 327-335. doi: 10.3799/dqkx.2011.034

Gravity and Magnetic Anomaly Separation Based on Bidimensional Empirical Mode Decomposition

doi: 10.3799/dqkx.2011.034
  • Received Date: 2010-12-10
  • Publish Date: 2011-03-01
  • Geological process often experienced a number of causal or complex genetic stages, which often resulted in original gravity and magnetic anomaly composed of various geological elements including background anomaly, and local anomaly which may be caused by deposits, alternation and concealed rocks, etc., which are associated with mineral exploration and prospecting. It is one of the most difficult issues in mineral prospecting and potential resource assessment as how to separate gravity and magnetic anomaly, which is significant for mineral exploration from original composite anomaly. Empirical mode decomposition (EMD) is considered to be an effective method in superimposed information separation. In this paper, a new bidimensional empirical mode decomposition (BEMD) method is proposed, that is, biharmonic spline interpolation (BSI) instead of general spline interpolation for improving stability. As a case study, gravity and magnetic data in Gejiu, Yunnan, China, have been used to extract local anomaly which could reveal potential information in mineral exploration by multiscale and nonlinear decomposition with BEMD method. It extends the application of empirical mode decomposition.

     

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