Depositional environments of "accreted bedded cherts" in the Shimanto terrane, Southwest Japan, on the basis of major and minor element compositions
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概要
- 論文の詳細を見る
Chemical characteristics and depositional environments of bedded cherts collected from a melange block in the Cretaceous northern Shimanto terrane were examined on the basis of their major and minor element compositions. The bedded cherts, accompanied by underlying pillow basalts, have been considered to be a part of an "accretional prism" originated in a low-latitude ocean ridge region far from the present position. However, geochemical data show that the bedded cherts are not enriched in hydrothermal elements such as Fe and Mn, and have deposited in an environment free from intense hydrothermal activities usually found around an ocean ridge. The present data, as well as those of marine sediments from various environments, demonstrate that the so-called "accreted bedded cherts" in the Shimanto terrane are not deep pelagic in origin but formed in a hemipelagic environment such as offshore or marginal sea.
- 名古屋大学の論文
著者
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Adachi Mamoru
Department of Earth and Planetary Sciences, Graduate School of Science, Nagoya University
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Adachi Mamoru
Department Of Earth And Planetary Sciences Graduate School Of Science Nagoya University
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YAMAMOTO Koshi
Department of Earth and Planetary Sciences, Graduate School of Science, Nagoya University
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NAKAMARU Kango
The Shin-Nippon Meteorological & Oceanographical Consultants CO., LTD.
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Yamamoto Koshi
Department Of Earth And Planetary Sciences Faculty Of Science Kobe University
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Nakamaru Kango
The Shin-nippon Meteorological & Oceanographical Consultants Co. Ltd.
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Yamamoto Koshi
Department Of Earth And Environmental Sciences Graduate School Of Environmental Studies Nagoya Unive
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Adachi Mamoru
Department Of Anesthesiology Fukushima Medical College
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YAMAMOTO Koshi
Department of Agriculture, Tokyo University of Agriculture, Tokyo 156–8502, Japan
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