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- Mark Pilkington
- Geological Survey of Canada, Ottawa, ON, Canada
書誌事項
- 公開日
- 1997-08-01
- DOI
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- 10.1190/1.1444214
- 公開者
- Society of Exploration Geophysicists
この論文をさがす
説明
<jats:title>Abstract</jats:title> <jats:p>A 3-D inversion approach is outlined that determines a distribution of susceptibility that produces a given magnetic anomaly. The subsurface model consists of a 3-D array of rectangular blocks, each with a constant susceptibility. The inversion incorporates a model norm that allows smoothing and depth-weighting of the solution. Since the number of parameters can be many thousands, even for small problems, the linear system of equations is inverted using a preconditioned conjugate gradient approach. This reduces memory requirements and avoids large matrix multiplications. The method is used to determine the 3-D susceptibility distribution responsible for the Temagami magnetic anomaly in southern Ontario, Canada.</jats:p>
収録刊行物
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- Geophysics
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Geophysics 62 (4), 1132-1142, 1997-08-01
Society of Exploration Geophysicists
