[S-CG49] Hard-Rock Drilling Science: From Continental to Deep Sea Drilling, and Oman Project

Tue. May 28, 2019 10:45 AM - 12:15 PM A07 (TOKYO BAY MAKUHARI HALL)

convener:Katsuyoshi Michibayashi(Department of Earth and Planetary Sciences, Nagoya University), Eiichi TAKAZAWA(Department of Geology, Faculty of Science, Niigata University), Norikatsu Akizawa(Department of Ocean Floor Geoscience, Atmosphere and Ocean Research Institute, The University of Tokyo), Chairperson:Tomoaki Morishita(Kanazawa University), Katsuyoshi Michibayashi

The Oman Drilling Project (OmDP) has completed to drill numerous hard-rock cores within ancient oceanic lithosphere and the underlying subduction zone of the Samail ophiolite in Oman, with support from ICDP, IODP, Japan Society for the Promotion of Science, the Sloan Foundation's Deep Carbon Observatory, US, and European research agencies. Moreover, a number of IODP expeditions have focused on hard-rock drilling over the last several years including Expedition 352 in 2014, which drilled the volcanic sequence associated with subduction initiation in the Bonin fore-arc, Expedition 357, which drilled the Lost City hydrothermal field, Expedition 360, which drilled the lithosphere associated with ultraslow-spreading at the Southwest Indian Ridge in 2016, and Expedition 366, which drilled the serpentinite seamounts in the Mariana fore-arc. In this session, we invite presentations on the scientific results of hard-rock drilling at these and other sites. We also invite related presentations on oceanic lithosphere, island arc formation, and any other significant issue that could be addressed by future hard-rock drilling. This includes marine studies of oceanic lithosphere and on-land geological investigations of ophiolites, accreted arcs, and subduction complexes. The session is intended to be interdisciplinary, including the fields of geophysics, geochemistry, petrology, engineering, and biology.

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10:45 AM - 11:00 AM

[SCG49-12] Structural analyses of ultramafic rocks used by X-ray CT core imaging (Oman Drilling Project Phase 2, D/V CHIKYU)

*Katsuyoshi Michibayashi¹, Yuki Kakihata¹, Ikuo Katayama², Atsushi Okamoto³, Keishi Okazaki⁴, Peter B Kelemen⁵, Eiichi TAKAZAWA⁶, Damon A H Teagle⁷, Oman Drilling Project Phase 2 Science Party⁸ (1.Department of Earth and Planetary Sciences, Graduate School of Environmental Studies, Nagoya University, 2.Hiroshima University, 3.Tohoku University, 4.KCC, JAMSTEC, 5.Columbia University of New York, 6.Niigata University, 7.Southampton University, 8.ICDP)

11:00 AM - 11:15 AM

[SCG49-13] Petrophysical characteristics of serpentinized peridotites of Hole BA1B, BA3A and BA4A

*Kakihata Yuki¹, Katsuyoshi Michibayashi², Laura Crispini³, Bjorn Jamtveit⁴, Samuel Barbier⁵, Joe Aslin⁶, Manuel Menzel⁷, Marguerite Godard⁸ (1.Graduate School of Science, Shizuoka University, 2.Graduate School of Environmental Studies, Nagoya University, 3.University of Genova, 4.University of Oslo, 5.Claude Bernard University Lyon 1, 6.University of Liverpool, 7.Andalusian Earth Science Institute, 8.Géosciences Montpellier, CNRS, Univ. Montpellier)

11:15 AM - 11:30 AM

[SCG49-14] Physical properties of the Moho TZ: Implications from ICDP Oman Drilling Project Phase I & II on-board measurements

*Natsue Abe^1,12, Keishi Okazaki¹, Ikuo Katayama², Kohei Hatakeyama², Yuya Akamatsu², Benoit Ildefonse³, Ulven Ivar Ole⁴, Gilvert Hong⁵, Wenlu Zhu⁶, Benoit Cordonnier⁴, Katsuyoshi Michibayashi⁷, Eiichi TAKAZAWA⁸, Michell Harris¹⁰, Damon Teagle¹¹, Peter Kelemen⁹, Marguerite Godard³, Jurg Matter¹¹, Jude Coggon¹¹, Oman Drilling Project Scientific Party (1.Japan Agency for Marine-Earth Science and Technology, 2.Hiroshima University, 3.Universitè de Montpellier, 4.University of Oslo, 5.Seoul National University, 6.University of Maryland, 7.Nagoya University, 8.Niigata University, 9.Columbia University, 10.Polymouth University, 11.University of Southampton, 12.Kanazawa University)

11:30 AM - 11:45 AM

[SCG49-15] Seismic anisotropy under high pressure conditions of harzburgite collected from Oman Drilling Project Phase II

*Kohei Hatakeyama¹, Ikuo Katayama¹, Natsue Abe², The Oman Drilling Project Phase II Science Party (1.Department of earth and planetary systems science, Hiroshima University , 2.JAMSTEC)

11:45 AM - 12:00 PM

[SCG49-16] Understanding of the mode of seafloor spreading and the architecture of upper oceanic crust by oceanfloor drilling at off-Hawaii MoHole candidate site

*Susumu Umino¹, Tomoaki Morishita¹, Mikiya Yamashita², Osamu Ishizuka³ (1.Department of Earth Sciences, Kanazawa University, 2.Japan Agency for Marine-Earth Science and Technology, 3.Geological Survey of Japan, AIST)

Discussion (12:00 PM - 12:15 PM)

Session information