<調査報告>東海大学 "望星丸II世" による第4次奥尻海嶺調査航海概報

概要

論文の詳細を見る
The fourth exploratory cruise of the R/V "Bosei Maru II" of Tokai University to the Okushiri Submarine Ridge, off the western coast of Hokkaido, was carried out from 6 to 9 July, 1989. Observation of submarine topography with P. D. R. and geophysical exploration with a proton magnetometer were perfoemed through the cruise. Large quantities of rock samples were dredged from six stations on the western slope of the Kaiyo Seamount Ridge of the northern Okushiri Submarine Ridge and columner core, 600 cm in length, was obtained with a piston corer in the northern Japan Sea Basin. Many rock types were distinguished in these dredged samples. Most of the dredged samples collected on St. 2 and St. 3 were basaltic rocks, comprising fragments of massive basalt, lava, pillow basalt and dolerite, some of which have been severly altered by weathering, associated with authigenic secondary minerals.
北海道東海大学の論文
1990-03-20