- 構造地質部会

 º ./ » 3῎,* ,**+ Structural Geology, No. ./, 3῎,*, ,**+
ῌ Some Considerations on the Research History of the Paleo-Ryoke Belt
(+) Ichikawa’s Paleo-Ryoke Belt
*ῌ**
Ikuo Hara* and Takami Miyamoto**
Abstract : The Paleo-Ryoke Belt as a continent, which was first proposed by Ichikawa
(+31* in a viewpoint of geosynclinal orogeny, +32+ in a viewpoint of plate tectonics), is
now considered to be placed along the Median Tectonic Line in Southwest Japan and
to have been amalgamated with the original constituents of the Ryoke belt (accretionary complexes developed in front of the Hida continent) in early Cretaceous.
Some tectonic models for its reconstruction have been proposed by many authors, now
being in hot dispute. This paper investigates how the di#erence between two tectonic
models, Model I proposed by Takagi & Shibata (+330, ,***) and Model II proposed by
Hara et al. (+33*a, +33+, +33,) and Miyamoto & Hara (+330), is related with their
understanding of Ichikawa’s papers.
Key words : Paleo-Ryoke Belt, tectonic model, research history, Ichikawa’s papers
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OYO CORPORATION., -῎+῎-*, Minaga, Saeki-ku, Hiroshima, 1-+῎/+,., Japan
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Department of Earth and Planetary Systems Science,
Graduate School of Science, Hiroshima University, +῎-῎+
Kagamiyama, Higashi-Hiroshima, 1-3῎2/,0, Japan
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Uemura, T. and Yokota, S. +32+, Deformation facies
of the folded Jurassic Kuruma Group. Earth
Sci. (Chikyu Kagaku), -/, .+ῌ.2.
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Yao, A., +32., Subdivision of the Mesozoic complex
in Kii-Yura area, Southwest Japan and its bearing on the Mesozoic basin development in the
Southern Chichibu Terrane. Jour. Geosci.
Osaka City Univ., ,1, .+ῌ+*-.
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