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タイトル: 20. 地質學的,岩石學的に見た,昭和21年の櫻島の活動 : その1 地質學的觀察
その他のタイトル: 20. Geological and Petrological Notes on the Eruption of Sakura-jima in 1946. Part I. Geological observation
著者: 森本, 良平
著者(別言語): Morimoto, Ryohei
発行日: 1948年6月30日
出版者: 東京大学地震研究所
掲載誌情報: 東京大學地震研究所彙報. 第24冊第1/4号, 1948.6.30, pp.229-238
抄録: Since the great eruption in 1914, the insular volcano of Sakura-jima, Kagoshima Prefecture in Southern Kyusyu, has comparatively been in its calm state and has never outpoured its volcanic material as the lava-flow, though the minor activities, such as ejecting ash, bombs, and other gaseous or solid material, accompanied with or without volcanic earthquake, were sometimes recorded. The recent eruption occurred at the eastern flank of Minami-dake(south cone), at the point about 750m above the sea浜evel, without any conspicuous forerunning phenomena. The blocky lava was extruded through the vent seemed to be same formed during the former activities in 1939 and 1941. This lava emission lasted fa about two and half a months from March 11(?)th. to May 25th. and covered the area of about 3.2sq. km or more. Petrographically, the recent lava belongs to two pyroxenes-andesite and is similar to the ava erupted in 1914, but In former predominance of hyperstpene and almost absense of olivine are noticiable as compared with the main portion of the latter.
URI: http://hdl.handle.net/2261/10646
ISSN: 00408972


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