Multi-channel seismic reflection experiments in Izu-Ogasawara arc –2005 cruises–

Abstract

Multi-channel seismic (MCS) reflection experiments were carried out in 2005 to investigate a typical oceanic island arc system by obtained crustal structures in the Izu-Ogasawara region, by using R/V Kairei of Japan Agency for Marine-Earth Science and Technology (JAMSTEC). Swath-bathymetry, geomagnetic and gravity data are simultaneously observed during these cruises. In 2005, we collected a total of 3720km of MCS data: 1739.65km in KR05-06 and 1980.35km in KR05-16 cruises. The clear seismic reflection profiles of the subducting Pacific plate, forearc tectonic features and backarc basin structures, for the investigation of the crustal growth, showing that all of the MCS data collected are of good quality by onboard processing.