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  1. 040 理学部
  2. 0401 学術論文

Coarse Clastic Rocks of the Shimanto Supergroup in Eastern Shikoku and Kii Peninsula, Southwest Japan

http://hdl.handle.net/10091/12039
872d35c1-baf2-4a69-9d4a-ee905ed561ec
名前 / ファイル ライセンス アクション
Coarse_Clastic_Rocks_Shimanto_Supergroup.pdf Coarse_Clastic_Rocks_Shimanto_Supergroup.pdf (9.5 MB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2011-03-16
タイトル
タイトル Coarse Clastic Rocks of the Shimanto Supergroup in Eastern Shikoku and Kii Peninsula, Southwest Japan
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ departmental bulletin paper
著者 Kumon, Fujio

× Kumon, Fujio

WEKO 36343

Kumon, Fujio

Search repository
信州大学研究者総覧へのリンク
氏名 Kumon, Fujio
URL http://soar-rd.shinshu-u.ac.jp/profile/ja.ZUchOUkh.html
出版者
出版者 Faculty of Science, Kyoto University
引用
内容記述タイプ Other
内容記述 Memoirs of the Faculty of Science, Kyoto University. Series of geology and mineralogy. 49(1-2):63-109 (1983)
書誌情報 Memoirs of the Faculty of Science, Kyoto University. Series of geology and mineralogy

巻 49, 号 1-2, p. 63-109, 発行日 1983-09-30
抄録
内容記述タイプ Abstract
内容記述 The stratigraphy and correlation of the Cretaceous strata in eastern Shikoku and Kii Peninsula are examined based on the radiolarian biostratigraphy. As the results, the stratigraphic change of the sandstone composition was recognized. The sandstones of the late Early Cretaceous are rich in feldspar, especially of plagioclase, and poor in rock fragments. Most sandstones of the Late Cretaceous are dominant in rock fragments, especially of acidic to intermediate volcanic rocks. Most of the Paleogene sandstones are characterized by very dominant quartz and poor rock fragments. Such stratigraphic change is also supported by the change of conglomerate composition. It reflects the change of the provenance nature. The increasing trend of rock fragments consisting mainly of volcanic rocks in the Cretaceous sequences indicates that the volcanism of acidic to intermediate nature took place in the provenance to the north of the basin contemporaneously with the sedimentation of the Late Cretaceous Shimanto Supergroup, and provided a large amount of volcanic materials to the basin. This volcanism corresponds to the so~called late Mesozoic Igneous Activity in the Inner Zone of Southwest Japan. Thus, the Late Cretaceous Shimanto Supergroup represents one type of the forearc sedimentation in magmatic arc-trench system. The difference of clastic composition between the Cretaceous and the Paleogene is explained by the unroofing process of the Cretaceous magmatic terrane. Lastly, the geotectonic development of the Shimanto Belt and its provenance is discussed mainly based on the sedimentological analyses. The marginal sea setting similar to the present Philippine Sea is considered to be preferable for the Shimanto geosyncline.
資源タイプ(コンテンツの種類)
内容記述タイプ Other
内容記述 Article
書誌レコードID
収録物識別子タイプ NCID
収録物識別子 AA00732831
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