Details of the Abstract
| Title of paper | DESMEX airborne natural source EM demonstration survey in Gobabis (Namibia) using the three-component QAMT system |
| List of authors | Thiede, A., Schiffler, M., Schneider, M., Rochlitz, R., Stolz, R., Steuer, A., Bräuer, S., Plath, C., Becken, M., and the DESMEX Working Group |
| Affiliation(s) | University of Münster - Institute of Geophysics, Leibniz-Institute of Photonic Technology, supracon AG, LIAG Institute for Applied Geophysics, Leibniz-Institute of Photonic Technology, German Federal Institute for Geosciences and Natural Resources, supracon AG, German Federal Institute for Geosciences and Natural Resources, University of Münster - Institute of Geophysics |
| Summary |
Within the last decades, the search for ore deposits has become increasingly relevant. Likewise, the need for powerful exploration methods capable of detecting even deep-seated targets has risen. Since ore deposits are often characterised by good conductivity, airborne electromagnetic (EM) methods offer an efficient way for exploration in large-scale remote and even inaccessible terrain. Among those, airborne natural source EM has the potential of great penetration depth due to the far field source geometry using natural signal of atmospheric origin. As part of the DESMEX project series, we optimized the QAMT helicopter platform to meet airborne natural source EM requirements. Furthermore, we developed a robust multivariate processing code and implemented the option for natural source EM inversion in the custEM code. For demonstration, we conducted an airborne natural source EM survey in the Kalahari-Copper-Belt (Gobabis, Namibia) covering over 1000 km². We obtained spatially consistent and smooth sounding curves in a frequency range of 10 to 1000 Hz. Preliminary inversion results are in good agreement with other geophysical and geological information. |
| Session Keyword | 6.0 Marine and airbone EM |
| File upload |
6.0_desmex_airborne_natural_s_thiede.pdf
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