2 weeks 23 hours
Expedition 351 Izu-Bonin-Mariana Arc Origins
DATES: MAY 31st - JULY 30th, 2014
PORT OF DEPARTURE/RETURN: YOKOHAMA, JAPAN
CHIEF SCIENTISTS: RICHARD ARCULUS (AUSTRALIAN NATIONAL UNIVERISTY)
OSAMU ISHIZUKA (GEOLOGICAL SURVEY OF JAPAN)
EXPEDITION PROJECT MANAGER: KARA BOGUS
EDUCATION OFFICERS: ADAM BOGUS & MIKE PROSALIK
Scientist Supporting Institution Map: https://mapsengine.google.com/map/viewer?mid=z-3dATgLw2_Q.kOBdFJkX-eZA<
Expedition 351's objectives involve the study of both the sediment (oceanic crust Layer 1) and igneous basement (Layer 2) and were established to address a number of fundamental aims. The primary objectives include:
1) Determining the nature of the preexisting crust and mantle prior to subduction onset in the middle Eocene<,
2) Identifying and modeling the subduction initiation process and initial arc crust formation,
3) Determining the Paleogene <compositional evolution of the IBM arc, and
4) Establishing the geophysical properties of the Amami Sankaku Basin.
Expedition 351 is conceptually straightforward, targeting a single site involving penetration of a thick sedimentary section overlying oceanic crust of normal thickness. Nevertheless, the water depth (4720 m), sediment thickness (1300 m), and consequent depth into basement (~150 m) impose technical challenges. Relatively short transit times to and from the Amami Sankaku Basin will maximize the time available for scientific drilling and logging operations.
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