5:15 PM - 6:30 PM
[MIS09-P02] Detailed Topographic survey on basin areas of the Japan Sea and around Hokkaido
Keywords:marine topographic map, submarine slide, submarine channel
Many sets of submarine slide sheet and adjacent cliff are observed in West of the Oki Islands and the Oki Trough areas, and no major submarine channels are found in these areas. In the southwest part of Oki Trough, almost of all trough floor are occupied by a large number of slide sheets. Although several number of slides are found, large submarine channels, flat basin floor are observed, and many topographic highs formed by tectonic inversion (Okamura et al., 1996a, b) are distributed in the Toyama Trough and the Mogami Trough area. Many sets of cliffs and slide sheets are found in the slopes of western and northeastern margin of the Hidaka Torough, and with no major submarine canyons. Two remarkable submarine channels are observed and topographic highs are extended from south to north between two channels off Abashiri area in the Okhotsk Sea.
This study was conducted as a part of the shallow methane hydrate exploration project of METI.
Matsumoto, R., Hiromatsu, M., Aoki, S., Yanagimoto, Y., Satoh, M. and Nakajima T. (2014) Regional bathymetry and surface geology survey for gas chimney mapping, Shallow methane hydrate forum; Toward shallow methane hydrate as a resource, 3-1.
Matsumoto, R., Satoh, M. (2015) Reconnaissance survey of shallow gas hydrates: types and confirmed number gas chimney structure, Shallow methane hydrate forum 2014; Second year results for resource assessment of shallow gas hydrates, 02.
Okamura, Y. Morijiri, R., Tsuchiya, N. and Satoh, M. (1996a), Geological map of the vicinity of Awashima, Marine geology map series 47, Geological Survey of Japan.
Okamura, Y. Morijiri, R. and Satoh, M. (1996b), Geological map West of Akita, Marine geology map series 48, Geological Survey of Japan.