3D finite-difference modeling algorithm and anomaly features of ZTEM
| Autor: | Zhi-Qiang Li, Zhi-Ming Hu, Xing-Dong Zhang, Tao Wang, Kun-Peng Wang, Handong Tan |
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| Rok vydání: | 2016 |
| Předmět: |
Horizontal resolution
010504 meteorology & atmospheric sciences Computer science Finite difference method Grid cell 010502 geochemistry & geophysics 01 natural sciences Magnetic field Geophysics Magnetic components Electromagnetic system Algorithm 0105 earth and related environmental sciences Finite difference modeling |
| Zdroj: | Applied Geophysics. 13:553-560 |
| ISSN: | 1993-0658 1672-7975 |
| Popis: | The Z-Axis tipper electromagnetic (ZTEM) technique is based on a frequency-domain airborne electromagnetic system that measures the natural magnetic field. A survey area was divided into several blocks by using the Maxwell’s equations, and the magnetic components at the center of each edge of the grid cell are evaluated by applying the staggered-grid finite-difference method. The tipper and its divergence are derived to complete the 3D ZTEM forward modeling algorithm. A synthetic model is then used to compare the responses with those of 2D finite-element forward modeling to verify the accuracy of the algorithm. ZTEM offers high horizontal resolution to both simple and complex distributions of conductivity. This work is the theoretical foundation for the interpretation of ZTEM data and the study of 3D ZTEM inversion. |
| Databáze: | OpenAIRE |
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