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

Tue. May 28, 2019 9:00 AM - 10:30 AM 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:Eiichi Takazawa(Niigata University), Norikatsu Akizawa(AORI The University of Tokyo)

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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9:00 AM - 9:15 AM

[SCG49-06] Melt transport and compositional heterogeneity of the mantle: a case study of peridotite, dunite, and wehrlite from Atlantis Massif

*Norikatsu Akizawa¹, Gretchen L. Früh-Green², Akihiro Tamura³, Chiori Tamura¹, Tomoaki Morishita³ (1.Atmosphere and Ocean Research Institute, The University of Tokyo, 2.Department of Earth Sciences, Eidgenössische Technische Hochschule-Zürich, 3.Institute of Science and Engineering, Kanazawa University)

9:15 AM - 9:30 AM

[SCG49-07] Lower crustal accretion processes revealed from the study of gabbroic cores in Holes GT1A and GT2A, the ICDP Oman Drilling Project

*Sayantani Chatterjee¹, Eiichi TAKAZAWA¹, Katsuyoshi Michibayashi², Peter B Kelemen³, Damon A.H. Teagle⁴, Oman Drilling Project Phase I Science Party (1.Department of Geology, Faculty of Sciences, Niigata University, Japan, 2.Department of Earth and Environmental Sciences, Nagoya University, Japan, 3.Lamont Doherty Earth Observatory, Columbia University, USA, 4.Southampton Marine and Maritime Institute, University of Southampton, United Kingdom)

9:30 AM - 9:45 AM

[SCG49-08] Petrology of Oman listvenite : Implications for carbon cycle in the subduction zone

*Toma Takahashi¹, Tomoaki Morishita², Hiroki Sato³, Juan Miguel Guotana², Tatsuhiko Kawamoto⁴, Peter B Kelemen⁵, Jude Ann Coggon⁶, Michelle Harris⁷, Juerg Michael Matter⁶, Katsuyoshi Michibayashi⁸, Eiichi TAKAZAWA⁹, Damon A H Teagle⁶, The Oman Drilling Project Phase 1 science Party (1.Faculty of Geosciences and Civil Engineering, Kanazawa university, 2.Division of Natural Sciences, Graduate School of Natural Science and Technology, Kanazawa university, 3.Faculty of Science, Kyoto university, 4.Department of Geoscience, Faculty of Science, Shizuoka university, 5.Lamont-Doherty Earth Observatory, Columbia university, 6.School of Ocean and Earth Science, National Oceanography Center Southampton, University of Southampton, 7.School of Geography, Earth and Environmental Sciences, Plymouth University, 8.Department of Earth Planetary Sciences, Graduate School of Environmental Studies, Nagoya university, 9.Institute of Science and Technology, Niigata university)

9:45 AM - 10:00 AM

[SCG49-09] PGE and Os isotope variation in the gabbros and peridotites from the Oman DP drilling cores in the Samail ophiolite, Oman

*Ryoko Senda^1,2, Katsuhiko Suzuki², Tomoaki Morishita³, Eiichi TAKAZAWA⁴, Katsuyoshi Michibayashi⁵, Peter B Kelemen⁶, Damon AH Teagle⁷, Jude Ann Coggon⁷, Marguerite Godard⁸, The Oman DP Science Party (1.Faculty of Social and Cultural Studies, Kyushu University, 2.Research and Development Center for Submarine Resources, JAMSTEC, 3.School of Natural System, Colleage of Science and Technology, Kanazawa University, 4.SDepartment of Geology, Faculty of Science, Niigata University, 5.Department of Earth and Planetary Sciences, Nagoya University, 6.Columbia University, 7.University of Southampton, 8.Géosciences Montpellier)

10:00 AM - 10:15 AM

[SCG49-10] Overview of drilling of crust-mantle boundary at CM1&2 sites of Wadi Tayin massif of Oman ophiolite: the ICDP Oman Drilling Project

*Eiichi TAKAZAWA¹, Damon A H Teagle², Katsuyoshi Michibayashi³, Yoshihiko Tamura⁴, Jude Ann Coggon², Juerg Matter², Peter B Kelemen⁵, Oman Drilling Project Phase 2 Science Party (1.Department of Geology, Faculty of Science, Niigata University, 2.University of Southampton, 3.Nagoya University, 4.JAMSTEC, 5.Columbia University)

10:15 AM - 10:30 AM

[SCG49-11] Petrological observation of core samples drilled from a mantle section of the Oman ophiolite: A preliminary report of the Oman Drilling Project Phase 2

*Yuji Ichiyama¹, Oman Drilling Project Phase 2 Scientific Party (1.Chiba University)

Session information