Drilling Multiple Oceanic Core Complexes in the Shikoku Basin: A Geodynamic Backarc Transect from Early Rifting to Basin Termination

Yasuhiko Ohara

Presentation information

[E] Oral

S (Solid Earth Sciences ) » S-CG Complex & General

[S-CG60] Hard-Rock Drilling Science: Continental and Deep-Sea Drilling, and Ophiolite

Wed. May 27, 2026 9:00 AM - 10:30 AM 301A (International Conference Hall, Makuhari Messe)

Chairperson:Harigane Yumiko(Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST)), Hoshide Takashi(Faculty of International Resource Sciences, Akita University), Michibayashi Katsuyoshi(Department of Earth and Planetary Sciences, GSES , Nagoya University), Okazaki Keishi(Earth and Planetary Systems Science Program, Hiroshima University)

10:00 AM - 10:15 AM

[SCG60-05] Drilling Multiple Oceanic Core Complexes in the Shikoku Basin: A Geodynamic Backarc Transect from Early Rifting to Basin Termination

*Yasuhiko Ohara^1,2,3, Valentin Basch⁴, Marco Cuffaro⁵, Masakazu Fujii¹⁰, Yumiko Harigane⁶, Osamu Ishizuka⁶, Katsuyoshi Michibayashi², Kohei Nimura², Kyoko Okino⁷, Ryosuke Oyanagi⁸, Alessio Sanfilippo⁴, Jonathan E. Snow⁹, Kenichiro Tani¹¹, Hiroyuki Yamashita¹² (1. Hydrographic and Oceanographic Department of Japan, 2. Nagoya Universtiy, 3. Japan Agency for Marine-Earth Science and Technology, 4. University of Pavia, 5. National Research Council of Italy, 6. Geological Survey of Japan/AIST, 7. Atmosphere and Ocean Research Institute, University of Tokyo, 8. Kokushikan University, 9. Lousiana State University, 10. National Institute of Polar Research, 11. National Museum of Nature and Science, 12. Kanagawa Prefectural Museum of Natural History)

Keywords:Shikoku Basin, Oceanic Core Complex, Nankaido Megamullions, Mado Megamullion, IODP3