<調査報告>東海大学 "望星丸II世" による第3次奥尻海嶺調査航海概報

概要

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The third exploratory cruise to the Okushiri Submarine Ridge, off the western coast of Hokkaido, was carried out from 6 to 8 July, 1988,by the R/V "Bosei Maru II "of Tokay University. Observation of submarine topography by P. D. R. and geophysical exploration by a proton magnetometer were performed through the cruise. Large quantities of rock samples were dredged from three stations on the western slope of Kaiyo Seamount of the northern Okushri Submarine Ridge. Most of the dredged samples on St. I and St. II represent fragments of basalt and pillow basalts. The results obtained by the use of proton magnetomer are as follows; 1) The mag-netic anomaly is mostly negative. 2) The correspondence of the anomaly with the subma-rine topography is not distinct. 3) Anormlies of short wave length are predominant with a maximum of amplitud no more than 500 nT.
北海道東海大学の論文
1989-03-30