International ocean discovery program expedition 372 preliminary report creeping gas hydrate slides and Hikurangi LWD

Ingo A. Pecher, Philip M. Barnes, Leah J. LeVay, Sylvain M. Bourlange, Morgane M.Y. Brunet, Sebastian Cardona, Michael B. Clennell, Ann E. Cook, Brandon Dugan, Judith Elger, Davide Gamboa, Aggeliki Georgiopoulou, Shuoshuo Han, Katja U. Heeschen, Gaowei Hu, Gil Young Kim, Hiroaki Koge, Karina S. Machado, David D. McNamara, Gregory F. MooreJoshu J. Mountjoy, Michael A. Nole, Satoko Owari, Matteo Paganoni, Paula S. Rose, Elizabeth J. Screaton, Uma Shankar, Marta E. Torres, Xiujuan Wang, Hung Yu Wu, Stephanie M. Sharuga, Erin K. Todd, Jacob C. Robinson, Mark Robinson, Robert Aduddell, Susan Boehm, Inva Braha, Ty Cobb, Lisa Crowder, Aaron De Loach, Lachlan Douglass, Keith Dupuis, David Fackler, Timothy Fulton, Clayton Furman, Randy Gjesvold, Kevin Grigar, Sandra Herrmann, Michael Hodge, Jon Howell, Minh Huynh, Rhonda Kappler, Nicolette Lawler, Aaron Mechler, Mike Meiring, William Mills, Beth Novak, David Pedulla, Garrick Van Rensburg, Liam Warda

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

International Ocean Discovery Program (IODP) Expedition 372 combined two research topics, slow slip events (SSEs) on subduction faults (IODP Proposal 781A-Full) and actively deforming gas hydrate-bearing landslides (IODP Proposal 841-APL). Our study area on the Hikurangi margin, east of the coast of New Zealand, provided unique locations for addressing both research topics.SSEs at subduction zones are an enigmatic form of creeping fault behavior. They typically occur on subduction zones at depths beyond the capabilities of ocean floor drilling. However, at the northern Hikurangi subduction margin they are among the best-documented and shallowest on Earth. Here, SSEs may extend close to the trench, where clastic and pelagic sediments about 1.0-1.5 km thick overlie the subducting, seamount-studded Hikurangi Plateau. Geodetic data show that these SSEs recur about every 2 years and are associated with measurable seafloor displacement. The northern Hikurangi subduction margin thus provides an excellent setting to use IODP capabilities to discern the mechanisms behind slow slip fault behaviour.

Original languageEnglish
Pages (from-to)1-35
Number of pages35
JournalInternational Ocean Discovery Program: Preliminary Reports
Issue number372
DOIs
Publication statusPublished - 2018 Jan

All Science Journal Classification (ASJC) codes

  • Oceanography

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