International Ocean Discovery Program Expedition 352 Preliminary Report Izu-Bonin-Mariana Fore Arc Testing subduction initiation and ophiolite models by drilling the outer Izu-Bonin-Mariana fore arc 30 July–29 September 2014 Expedition 352 Scientists Published by International Ocean Discovery Program Publisher’s notes Material in this publication may be copied without restraint for library, abstract service, educational, or personal research purposes; however, this source should be appropriately acknowledged. Core samples and the wider set of data from the science program covered in this report are under moratorium and accessible only to Science Party members until 29 September 2015. This publication was prepared by the JOIDES Resolution Science Operator (JRSO) at Texas A&M University as an account of work performed under the International Ocean Discovery Program (IODP). Funding for the program is provided by the following agencies: National Science Foundation (NSF), United States Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan European Consortium for Ocean Research Drilling (ECORD) Ministry of Science and Technology (MOST), People’s Republic of China Korea Institute of Geoscience and Mineral Resources (KIGAM) Australian Research Council (ARC) and GNS Science (New Zealand), Australian/New Zealand Consortium Ministry of Earth Sciences (MoES), India Coordination for Improvement of Higher Education Personnel, Brazil Disclaimer Any opinions, findings, and conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the participating agencies, Consortium for Ocean Leadership, Lamont-Doherty Earth Observatory of Columbia University, Texas A&M University, or Texas A&M Research Foundation. Portions of this work may have been published in whole or in part in other International Ocean Discovery Program documents or publications. Copyright Except where otherwise noted, this work is licensed under a Creative Commons Attribution License. Unrestricted use, distribution, and reproduction is permitted, provided the original author and source are credited. Citation: Expedition 352 Scientists, 2015. Izu-Bonin-Mariana fore arc: Testing subduction initiation and ophiolite models by drilling the outer Izu-Bonin-Mariana fore arc. International Ocean Discovery Program Preliminary Report, 352. http://dx.doi.org/10.14379/iodp.pr.352.2015 ISSN World Wide Web: 2372-9562 February 2015 Expedition 352 Preliminary Report Expedition 352 participants Expedition 352 scientists Julian A. Pearce Aaron J. Avery Co-Chief Scientist Paleontologist (nannofossils) School of Earth & Ocean Sciences Earth, Ocean and Atmospheric Cardiff University Sciences Main Building, Park Place Florida State University Cardiff CF10 3AT 909 Antarctic Way United Kingdom Tallahassee FL 32306 [email protected] USA [email protected] Mark K. Reagan Co-Chief Scientist Claire Carvallo Department of Earth & Environmental Sci- Paleomagnetist ences Institut de Minéralogie et de Physique des The University of Iowa Milieux Condensés (IMPMC) 121 Trowbridge Hall Université Pierre et Marie Curie Iowa City IA 52242 4 Place Jussieu USA 75005 Paris [email protected] France [email protected] Katerina Petronotis Expedition Project Manager/ Timothy Chapman Staff Scientist Petrologist International Ocean Discovery School of Geosciences, F05 Program University of Sydney Texas A&M University 46 Brook Road 1000 Discovery Drive Glenbrook NSW 2773 College Station TX 77845-9547 Australia USA [email protected] [email protected] Gail L. Christeson Sally Morgan Physical Properties Specialist Logging Staff Scientist University of Texas Institute Department of Geology for Geophysics University of Leicester JJ Pickle Research Campus Building 196 University Road 10100 Burnet Road Leicester Austin TX 78758-4445 LE1 7RH USA United Kingdom [email protected] [email protected] Eric C. Ferré Renat Almeev Structural Geologist Physical Properties Specialist Department of Geology Institut für Mineralogie Southern Illinois University Leibniz University of Hannover at Carbondale Callinstrasse 3 1259 Lincoln Drive, Parkinson Lab 30167 Hannover Carbondale IL 62901-4234 Germany USA [email protected] [email protected] 3 Expedition 352 Preliminary Report Marguerite Godard Hongyan Li Inorganic Geochemist Petrologist Geosciences Montpellier- UMR 5243 State Key Laboratory of Isotope Université Montpellier II Geochemistry CC 60, Place Eugene Bataillon Guangzhou Institute of Geochemistry, Chi- 34095 Montpellier nese Academy of Sciences France 511 Kehua Street, Wushan [email protected] Guangzhou 510640 P.R. China Daniel E. Heaton [email protected] Petrologist College of Earth, Ocean and Yibing Li Atmospheric Sciences Inorganic Geochemist Oregon State University Institute of Geology 104 CEOAS Administration Building Chinese Academy of Geological Science Corvalis OR 97331-5503 Baiwanzhuang Road 26 USA Beijing 100037 [email protected] P.R. China [email protected] Maria Kirchenbaur [email protected] Inorganic Geochemist Geologisches Institut Katsuyoshi Michibayashi Universität Kõln Physical Properties Specialist Zulpicher Strasse 49 Institute of Geosciences 50674 Koln Shizuoka University Germany 836 Ohya, Suruga-ku [email protected] Shizuoka 422-8529 Japan Walter Kurz [email protected] Structural Geologist Institute of Earth Sciences Wendy R. Nelson University of Graz Petrologist Heinrichstrasse 26 Earth & Atmospheric Sciences A-8010 Graz University of Houston Austria 312 Science & Research Building 1 [email protected] Houston TX 77204 USA Steffen Kutterolf [email protected] Sedimentologist GEOMAR Helmholtz Centre for Ocean Julie Prytulak Research Kiel Petrologist Wischhofstrasse 1-3 Department of Earth Science & 24148 Kiel Engineering Germany Imperial College London [email protected] South Kensington Campus Prince Consort Road London SW7 2AZ United Kingdom [email protected] 4 Expedition 352 Preliminary Report Marie Python Tetsuya Sakuyama Alteration Petrologist Physical Properties Specialist Department of Earth and Planetary Institute for Research on Earth Sciences Evolution (IFREE) Hokkaido University Japan Agency for Marine-Earth Science and Kita-ku, Kita 10, Nishi 8 Technology (JAMSTEC) Hokkaido Sapporo 060-0810 2-15 Natsushima-cho Japan Yokosuka Kanagawa 237-0061 [email protected] Japan [email protected] Alastair H.F. Robertson Sedimentologist Present address (1 October 2014): School of Geosciences Department of Science University of Edinburgh Osaka University West Mains Road 3-3-138 Sugimoto Edinburgh EH9 3JW Sumiyoshi-ku Osaka 558-8585 United Kingdom Japan [email protected] John W. Shervais Jeffrey G. Ryan Petrologist Inorganic Geochemist Department of Geology Department of Geology Utah State University University of South Florida, Tampa 4505 Old Main Hill 4202 East Fowler Avenue SCA 528 Logan UT 84322-4505 Tampa FL 33620 USA USA [email protected] [email protected] Kenji Shimizu William W. Sager Petrologist Paleomagnetist Institute for Research on Earth Earth & Atmospheric Sciences Evolution (IFREE) University of Houston Japan Agency for Marine-Earth Science and 127B Science and Research Building 1 Technology (JAMSTEC) Houston TX 77204 2-15 Natsushima-cho USA Yokosuka 237-0061 [email protected] Japan [email protected] Scott A. Whattam Petrologist Department of Earth and Environmental Sciences Korea University Seoul 136-701 Republic of Korea [email protected] 5 Expedition 352 Preliminary Report Siem Offshore AS officials Steve Bradley Wayne Malone Master of the Drilling Vessel Offshore Installation Manager Education and outreach Elizabeth A. Christiansen Amy E. West Education Officer Education Officer H.H. Dow High School San Luis Obispo CA Midland MI 48640 USA USA [email protected] [email protected] Technical support Lisa Brandt Rachael Gray Chemistry Laboratory Chemistry Laboratory Timothy Bronk Margaret Hastedt Assistant Laboratory Officer Core Laboratory Chad Broyles Michael Hodge Curatorial Specialist Marine Computer Specialist Lisa Crowder Stephen Midgley Assistant Laboratory Officer Operations Superintendent Keith Dupuis William Mills Publications Specialist Laboratory Officer Emily Fisher Algie Morgan Thin Section Laboratory Applications Developer Seth Frank Zenon Mateo X-ray/Microbiology Laboratory Underway Geophysics Laboratory Timothy Fulton Beth Novak Imaging Specialist Paleomagnetism Laboratory Clayton Furman Garrick Van Rensburg Schlumberger Logging Engineer Marine Instrumentation Specialist Randy Gjesvold Thomas Wick Marine Instrumentation Specialist Marine Computer Specialist 6 Expedition 352 Preliminary Report Abstract The objectives for Expedition 352 were to drill through the entire volcanic sequence of the Bonin fore arc to 1. Obtain a high-fidelity record of magmatic evolution during subduction initia- tion and early arc development, 2. Test the hypothesis that fore-arc basalt lies beneath boninite and understand chemical gradients within these units and across the transition, 3. Use drilling results to understand how mantle melting processes evolve during and after subduction initiation, and 4. Test the hypothesis that the fore-arc lithosphere created during subduction initiation is the birthplace of suprasubduction zone (SSZ) ophiolites. Expedition 352 successfully cored 1.22 km of igneous basement and 0.46 km of over- lying sediment, providing diverse, stratigraphically controlled