Depth to magnetic source using the generalized analytic signal
- 1 November 1998
- journal article
- Published by Society of Exploration Geophysicists in Geophysics
- Vol. 63 (6), 1947-1957
- https://doi.org/10.1190/1.1444488
Abstract
The advantage of using analytic signal techniques to determine magnetic parameters from magnetic anomalies is the independence of magnetization direction. In addition, using the amplitude ratio method to determine depths to magnetic sources can avoid tedious operations with several characteristic points and reduce interference effects. A drawback of this method, however, is the assumption that near‐surface structures can be characterized adequately by step models. To improve mapping resolution, we have extended the amplitude ratio method to allow both step‐like and dike‐like structures. A criterion is constructed that discriminates between maxima from dike‐like or step‐like structures and significantly improves near‐surface structural mapping. This avoids a bias in geological interpretation caused by the original assumption that all structures can be characterized by step models. Synthetic data and real data acquired offshore northern Taiwan demonstrate the effectiveness of this method.Keywords
This publication has 19 references indexed in Scilit:
- Automatic 3-D interpretation of potential field data using analytic signal derivativesGeophysics, 1997
- Transition between the Okinawa trough backarc extension and the Taiwan collision: New insights on the southernmost Ryukyu subduction zoneMarine Geophysical Research, 1996
- International Geomagnetic Reference Field, 1995 RevisionGeophysical Journal International, 1996
- High‐resolution detection of geologic boundaries from potential‐field anomalies: An enhanced analytic signal techniqueGeophysics, 1996
- Is Taiwan the result of arc-continent or arc-arc collision?Earth and Planetary Science Letters, 1995
- Oblique convergence, indentation and rotation tectonics in the Taiwan Mountain Belt: Insights from experimental modellingEarth and Planetary Science Letters, 1994
- Advantages of using the vertical gradient of gravity for 3-D interpretationGeophysics, 1993
- 3-D Analytic Signal in the Interpretation of Total Magnetic Field Data at Low Magnetic LatitudesExploration Geophysics, 1993
- Approximating edges of source bodies from magnetic or gravity anomaliesGeophysics, 1986
- Interpretation of magnetic anomalies due to dikes: The complex gradient methodGeophysics, 1981