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

Pecher, I. A., Barnes, P. M., LeVay, L. J., Bourlange, S. M., Brunet, M. M. Y., Cardona, S., Clennell, M. B., Cook, A. E., Dugan, B., Elger, Judith, Gamboa, D., Georgiopoulou, A., Han, S., Heeschen, K. U., Hu, G., Kim, G. Y., Koge, H., Machado, K. S., McNamara, D. D., Moore, G. F., Mountjoy, J. J., Nole, M. A., Owari, S., Paganoni, M., Rose, P. S. and Screaton, E. J. (2018) International ocean discovery program expedition 372 preliminary report: Creeping gas hydrate slides and Hikurangi LWD Integrated Ocean Drilling Program: Preliminary Reports, 372 . Texan A&M University. DOI 10.14379/iodp.pr.372.2018.

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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.

Document Type: Report (Cruise Report)
Keywords: IODP Expedition 372, Gas hydrate slides, Kikurangi LWD
Research affiliation: MARUM
GFZ
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-GDY Marine Geodynamics
DOI etc.: 10.14379/iodp.pr.372.2018
ISSN: 2372-9562
Projects: IODP
Expeditions/Models:
  • IODP Exp. 372
Date Deposited: 04 Jun 2018 07:53
Last Modified: 04 Jun 2018 07:53
URI: http://eprints.uni-kiel.de/id/eprint/43234

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