Solid Earth Sciences(S)
Session Sub CategoryComplex & General
Session IDS-CG63
TitleCrust-Mantle Connections / Hard-Rock Drilling
Short titleCrust-Mantle Connections
Main ConvenerNameYoshihiko Tamura
AffiliationR & D Center for Ocean Drilling Science, Japan Agency for Maine-Earth Science and Technology
Co-Convener 1NameKatsuyoshi Michibayashi
AffiliationInstitute of Geosciences, Shizuoka University
Co-Convener 2NameEiichi TAKAZAWA
AffiliationDepartment of Geology, Faculty of Science, Niigata University
Co-Convener 3NameKaty Jane Chamberlain
AffiliationJapan Agency for Marine-Earth Science and Technology
Co-Convener 4NameTomoaki Morishita
AffiliationSchool of Natural System, Colleage of Science and Technology, Kanazawa University
Co-Convener 5NameHenry JB Dick
AffiliationWoods Hole Oceanographic Institution
Co-Convener 6NameMark K Reagan
AffiliationUniversity of Iowa
Co-Convener 7NameSusanne M Straub
AffiliationLamont Doherty Earth Observatory of Columbia University
ScopeA number of IODP expeditions have focused on hard-rock drilling over the last decade including Expedition 352 in 2014, which drilled the volcanic sequence associated with subduction initiation in the Bonin fore-arc, and Expedition 360, which drilled the lithosphere associated with ultraslow-spreading at the Southwest Indian Ridge in 2016. In this session, we review the current status of our understanding for oceanic lithosphere and island arc formation or anything important beyond and discuss significant issue to be answered by up-coming/future hard-rock drilling. Preliminary results from the recent Expeditions are also welcome. The session also seeks to explore the crust-mantle connections among ophiolites, at divergent and convergent plate boundaries and ocean island settings. Crustal thickness and composition are correlated on ocean islands where the spatial variability in erupted magma compositions is reflected in the composition of the crust. To what extend to crustal composition reflect those of the primary melts? How diverse is the spectrum of primary melts and which factors may contribute to its variations? What is the influence of crustal processing vs. primary magma diversity in creating the diversity of the Earth's crust? The session invites contributions from interdisciplinary field ranging from geophysics, geochemistry, petrology, engineering and biology working on hard-rock cores/samples from the expeditions or any other research vessels as well as on-land geology such as ophiolites.
Type of presentationOral and Poster presentation
Invited authors