著者

中尾 征三

出版者

The Sedimentological Society of Japan

雑誌

堆積学研究会報 (ISSN:18844715)

巻号頁・発行日

vol.31, no.31, pp.3-14, 1989-10-31 (Released:2010-05-27)

参考文献数

32

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The Geological Survey of Japan has been conducting a study on submarine hydrothermal activity in the Izu-Ogasawara (or Bonin) Arc and the northernmost part of the Mariana Arc since 1984. Hydrothermal products, both unequivocal and inferred, are divided into three categories: 1) manganese or iron enriched sediments, and Mn-Fe hydroxide and silica deposits (chimneys) in the back-arc basin area; 2) manganese and/or iron oxide deposits occurring in the mountainous areas of both the back-arc and the volcanic front areas; and 3) a veinlet of iron-copper-zinc sulfides in hydothermally altered andesite on a wall of a submarine caldera along the volcanic front. This paper outlines these products as well as related geological, geophysical and geochemical data in the area.