ID 74540
Title Transcription
シコク チュウオウブ イノ チイキ ニオケル チチブタイ ホクタイ ノ ナノカワ ショウジョウ ダンソウ シュウヘン ノ チシツ コウゾウ
Title Alternative
Geological structures around the Nanokawa thrust of the Northern Chichibu Terrain of the Ino Area, Central Shikoku
Author
Murata, Akihiro Geology Department,Faculty of Integrated Arts and Sciences,University of Tokushima Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Inufusa, Yoichi Graduate School of Human and Natural Environment Sciences,University of Tokushima
Hashimoto, Yosuke Faculty of Sciences,Osaka Prefectural University
Maekawa, Hirokazu Department of Physical Science,Graduate School of Science,Osaka Prefectural University
Keywords
Nanokawa thrust
geological structures
Sambagawa metamorphism
pumpellyite-actinolite facies
alkali amphibole
prehnite-pumpellyite facies
Shikoku
Northern Chichibu Terrain
Content Type
Departmental Bulletin Paper
Description
The Nanokawa thrust occurs in the Jurassic accretionary complexes of the Northern Chichibu Terrain in the Ino Area, Central Shikoku. Along the thrust,greenstones and pelitic semi-schists are thrust over chaotic formations,sandstones and greenstones. The strata of the hanging wall of the thrust dip gently and are slightly folded,whereas those of the footwall dip steeply to the north. Metamorphic minerals of the greenstones of the hanging wall and footwall of the Nanokawa thrust are examined. The greenstones of the hanging wall contain alkali amphibole, alkali pyroxene, stilpnomelane and pumpellyite, and have undergone the pumpellyite-actinolite facies metamorphism. On the other hand, those of the footwall contain prehnite and pumpellyite, and 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 Nanokawa thrust, which runs to the north of Shirakidani limestone body in Central Shikoku, and to the north of the Torigatayama limestone body in Middle West Shikoku, is probably a southern boundary of the Jurassic accretionary deposits which have undergone the Sambagawa Metamorphism.
Journal Title
徳島大学総合科学部自然科学研究 = Natural Science Research, The University of Tokushima
ISSN
0914-6385
NCID
AN10065859
Volume
22
Start Page
13
End Page
27
Sort Key
13
Published Date
2008
EDB ID
FullText File
language
jpn
departments
Science and Technology