紀伊半島中央部，三重県宮川村～奈良県天川村の秩父累帯

• 加藤 潔

• 清水 宏典

• 坂 幸恭

書誌事項

タイトル別名

• Chichibu Terrane of Miyagawa-mura, Mie Prefecture and Tenkawa-mura, Nara Prefecture in the central Kii Peninsula, Southwest Japan.
• キイハントウ チュウオウブ ミエケン ミヤガワムラ ナラケン テンカワムラ ノ チチブルイタイ

抄録

The Kurosegawa Terrane intervening in the Chichibu Terrane represents a serpentinite melange zone. It is characterized by various kinds of exotic rocks, including granitoids, metamorphic rocks of different metamorphic degrees and Siluro-Devonian sediments, and is intimately associated with the Cretaceous forearc basin sediments. The Chichibu Terrane of the central Kii Peninsula has long been believed to consist only of its southern belt, with its northern and middle belts missing due to fault-tectonics. We revealed that the terrane comprises the northern and the middle belts as well as the southern belt, separated by longitudinal faults from each other. Each belt is characterized by different lithology, structure and metamorphic grade of degree, and consists mainly of the Jurassic-Early Cretaceous accretionary complex. Peculiar rocks exotic to the accretionary complex and characteristic of the Kurosegawa Terrane are found in the middle belt. They are named the Gobanseki Metagabbro, the Dorokawa Metagabbro and the Kosakatoge Complex. Occurrence of rocks typical of the Kurosegawa Terrane in the middle belt safely attests that the middle belt is represented by the Kurosegawa Terrane and that the Kurosegawa Terrane, without an essential break in between, extends from the eastern end up to the central part of the Kii Peninsula where the deepest erosion level of the Chichibu Terrane is exposed on the ground surface due to the later tectonic uplift. Occurrence of the Kurosegawa Terrane in the central Kii Peninsula cannot be compatible with the nappe model proposed to explain the formation of the Kurosegawa Terrane and would be more satisfactorily explained by a new model that the Kurosegawa Terrane is a product of episodic fault tectonics in the late Early Cretaceous period.

収録刊行物

• 地質学雑誌

  地質学雑誌 108 (9), 557-574, 2002

  一般社団法人 日本地質学会

キーワード

• Nara Prefecture

詳細情報

• CRID: 1390001206235332992
• NII論文ID: 110003009746
• NII論文ID: 10010167724
• NII書誌ID: AN00141768
• DOI: 10.5575/geosoc.108.557
• COI: 1:CAS:528:DC%2BD38XotF2nt70%3D
• ISSN: 13499963
• ISSN: 00167630
• ISSN: http://id.crossref.org/issn/00167630
• NDL書誌ID: 6311306
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6311306
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
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