International Ocean Discovery Program

Expedition 352: Izu-Bonin-Mariana Forearc

July 2014 - September 2014

Expedition 352 MapThe principal aim of Expedition 352 is to examine magmatic evolution, chemostratigraphy and arc crustal accretion processes associated with subduction initiation in intra-oceanic convergent margins. Downhole logging will provide in situ measurements from the volcanic basement intervals in two 1 km deep holes in the Izu-Bonin-Mariana Forearc.

Results will help test the following hypotheses:

  • Forearc basalt tholeiites lie beneath boninites in the volcanic stratigraphy in this setting; and
  • Forearc lithosphere created during subduction initiation is the birthplace of supra-subduction zone ophiolites.

Logging Staff Scientist


  • Pearce, J.A., Reagan, M.K., Petronotis, K., Morgan, S., and IODP Expedition 352 Scientists. 2015. Izu-Bonin-Mariana fore arc: Testing subduction initiation and ophiolite models by drilling the outer Izu-Bonin-Mariana fore arc. Integrated Ocean Drilling Program: Preliminary Reports, doi: 10.14379/
  • Christeson, G., Morgan, S., et al., Physical Properties and Seismic Structure of Izu-Bonin-Mariana Fore Arc Crust: Results from IODP Expedition 352 and Comparison with Oceanic Crust, Geochemistry, Geophysics, Geosystems, 18. doi: 10.1002/2016GC006638.

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