Wide-angle seismic experiment crossing the southern Izu-Ogasawara Arc and multi-channel seismic profiling of the Ogasawara Plateau –KR07-03 cruise–

Abstract

We carried out a wide-angle reflection and refraction experiment using 100 ocean bottom seismographs on a 536-km long seismic line crossing the southern Izu-Ogasawara Arc, and a multi-channel seismic reflection profiling of 204-channel hydrophone streamer on a 318-km long seismic line transecting from the Ogasawara Trough to the Ogasawara Plateau. The cruise was conducted by R/V Kairei of Japan Agency for Marine-Earth Science and Technology from March 4 to 30, 2007. The objectives of the cruise are to reveal the crustal structure of the southern Izu-Ogasawara Arc and detailed shallow structure of the Ogasawara Plateau and to understand the continental crustal formation and the collision style of oceanic plateau against to the subduction zone. In this paper, we summarize the seismic experiments and show the acquired data of ocean bottom seismographs and multi-channel seismic survey.