ID | 62929 |
Title Transcription | ヨシノガワタニ ミマチョウ ナカウエ ノ ドチュウソウ カラ ミイダサレタ コウド ヘンセイガンレキ
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Title Alternative | Gravels of high-grade metamorphic rock from the Dochu Formation, Nakaue, Yoshinogawa Valley, East Shikoku, Japan
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Author |
Nakao, Ken-ichi
Tokushima Prefectural Museum
Ishida, Keisuke
University of Tokushima
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Nishiyama, Ken-ichi
University of Tokushima
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Morie, Takashi
Wajiki Junior High School
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Keywords | 三波川変成岩
土柱層
変成岩礫
ざくろ石角閃岩
点紋角閃岩
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Content Type |
Departmental Bulletin Paper
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Description | A condensed bed of the gravels derived from high-grade metamorphic rocks has firstly found in the lower Pleistocene Dochu Formation, from the Nakaue outcrop, Mima-cho in Tokushima Prefecture. The metamorphic gravels are garnet amphibolite, spotted amphibolite, serpentinite and coase grained piedmontite-quartz schist.
The content of the metamorphic gravels is nearly 10 percent. Comparison with the modern original gravels, based on the mineral composition and rock texture on the slab, the metamorphic gravels were identified with the Sambagawa Metamorphic Rocks. Among them, garnet amphibolite and spotted amphibolite are high-grade metamorphic rocks that the modern distribution is restricted only in the Higashi Akaishi-yama district, central Shikoku, and the amphibolite gravels are rarely found in recent Yoshino-gawa riverbed around the Mima-cho area. The Nakaue outcrop and gravels of high-grade metamorphic rocks were described, and the provenance of the gravels was discussed with tectonic and geomorphological respects. |
Journal Title |
徳島大学総合科学部自然科学研究 = Natural Science Research, The University of Tokushima
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ISSN | 09146385
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NCID | AN10065859
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Volume | 23
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Issue | 1
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Start Page | 7
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End Page | 11
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Sort Key | 7
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Published Date | 2009-03-16
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EDB ID | |
FullText File | |
language |
jpn
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departments |
Science and Technology
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