Details of the Abstract
| Title of paper | Effective towed receiver offsets for controlled-source electromagnetic survey for imaging both seafloor and embedded massive sulfides |
| List of authors | Keiichi Ishizu1,2, Takafumi Kasaya2, Tada-nori Goto1,2, Katsuaki Koike3, Weerachai Siripunvaraporn4, Hisanori Iwamoto5, Yoshifumi Kawada2,7, and Jun-ichiro Ishibashi6 |
| Affiliation(s) |
1University of Hyogo, k.ishizu@sci.u-hyogo.ac.jp, 2Japan Agency for Marine-Earth Science and Technology, 3Kyoto University, 4Mahidol University, 5Nippon Marine Enterprises, Ltd., 6Kobe University, 7Now at Quemix Inc. |
| Summary | Deep-sea massive sulfides not only manifest as seafloor massive sulfides but also occur as embedded massive sulfides. Marine controlled-source electromagnetic (CSEM) methods prove effective for investigating these massive sulfides due to their lower electrical resistivity compared to the surrounding host rock. In our previous study (Ishizu et al., 2022), we demonstrated that a CSEM survey using a towed electric dipole transmitter with two types of receivers—stationary ocean bottom electric and towed receivers—can map both seafloor and embedded massive sulfides. Our investigation employed short-offset towed receivers with transmitter-receiver offsets less than 160 meters. In contrast, other studies have used towed CSEM systems with varying receiver offsets to explore deep-sea massive sulfides. Therefore, this presentation discusses the effective offset of towed receivers, using examples from hydrothermal deposits located shallower than 200 meters. |
| Session Keyword | 6.0 Marine and airbone EM |
| File upload |
6.0_effective_towed_receiver_ishizu_01.pdf
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