ID 74537
タイトルヨミ
シコク チュウオウブ ササガタニ チイキ ニオケル チチブ ホクタイ ノ チシツ コウゾウ
タイトル別表記
Geological structures of the Northern Chichibu Terrain of the Sasagatani Area,Central Shikoku
著者
村田, 明広 徳島大学大学院ソシオ・アーツ・アンド・サイエンス研究部 徳島大学 教育研究者総覧 KAKEN研究者をさがす
山崎, 亮輔 日本道路株式会社
前川, 寛和 大阪府立大学大学院理学系研究科物理科学教室
キーワード
Sasagatani fault
Nanokawa thrust
geological structures
Sanbagawa metamorphism
pumpellyite-actinolite facies
alkali amphibole
Shikoku
Northern Chichibu Terrain
資料タイプ
紀要論文
抄録
The Sasagatani fault in central Shikoku was considered to be a tectonic boundary between the Sanbagawa high-P/T metamorphic belt and the Chichibu non-high-P/T belt. Metamorphic minerals of the greenstones around the Sasagatani fault are examined. Alkali amphibole, alkali pyroxene, actinolite, stilpnomelane and pumpellyite are found not only on the north side of the fault, but also on the south side. Strata around the Sasagatani fault have undergone the pumpellyite-actinolite facies metamorphism. Thus, the Sasagatani fault is not an upper boundary fault of the Sanbagawa metamorphic rocks.
The Nanokawa thrust occurs in the Jurassic accretionary complexes of the Northern Chichibu Terrain in the Sasagatani Area. The greenstones of the hanging wall of the thrust have undergone the pumpellyite-actinolite facies metamorphism, whereas those of the footwall have undergone the prehnite-pumpellyite facies metamorphism. The Nanokawa thrust is a large overthrust, which has a different metamorphic grade between the hanging wall and footwall. The thrust is probably a southern boundary of the Jurassic accretionary deposits which have undergone the Sanbagawa metamorphism.
掲載誌名
徳島大学総合科学部自然科学研究 = Natural Science Research, The University of Tokushima
ISSN
09146385
cat書誌ID
AN10065859
23
3
開始ページ
61
終了ページ
72
並び順
61
発行日
2009
EDB ID
フルテキストファイル
言語
jpn
部局
理工学系