Details of the Abstract
| Title of paper | 3D Inversion of Controlled-Source Radio-Magnetotelluric (CSRMT) data of a waste-site in Cologne, Germany |
| List of authors | Fadavi Asghari S., Shlykov A., Tezkan B., Yogeshwar P., Saraev A. |
| Affiliation(s) |
Institute of Geophysics and Meteorology, University of Cologne Institute of Earth Sciences, St. Petersburg State University Institute of Geophysics and Meteorology, University of Cologne Institute of Geophysics and Meteorology, University of Cologne Institute of Earth Sciences, St. Petersburg State University |
| Summary |
Applied geophysics often employs electromagnetic methods for shallow subsurface investigations. Among these, the Radiomagnetotelluric method stands out, utilizing radio transmitters in the 10 kHz to 1 MHz frequency range to induce current systems in the conductive earth, generating secondary electric and magnetic fields. Despite its effectiveness, Radiomagnetotelluric faces challenges in remote areas lacking suitable radio transmitters, limiting its penetration depth. A modified method, Controlled-Source Radiomagnetotelluric, addresses these limitations by using specific base frequencies and their subharmonics to enhance data quality and increase penetration depth. Initial attempts at lower frequencies down to 1 kHz have shown promise. Recent research in Cologne, Germany, utilized two perpendicularly located Horizontal Electric Dipole sources to obtain full impedance tensor elements in the frequency range between 1kHz and 1 MHz, enabling 3D inversion of Controlled-Source Radiomagnetotelluric data. The results, compared with RMT data, successfully identified waste deposit with resistivity values aligning with geological information. Although some adjustments were needed to fulfill the Magnetotelluric approximation, the primary objective of waste-site distribution and depth detection was achieved. This study underscores the effectiveness of Controlled-Source Radiomagnetotelluric in overcoming limitations of traditional Radiomagnetotelluric, particularly in remote areas, and highlights its potential for accurate subsurface characterization in various geological contexts. |
| Session Keyword | 3.0 EM methods for exploration (geothermal, mineral resources, etc.) |
| File upload |
3.0_3d_inversion_of_controlle_fadavi_asghari.pdf
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