2024-03-29T05:24:43Z
https://soar-ir.repo.nii.ac.jp/oai
oai:soar-ir.repo.nii.ac.jp:00012020
2023-03-08T01:55:44Z
1169:1171:1172:1183
浜名湖西方地域の秩父帯付加コンプレックスから産出した後期古生代および中生代放散虫化石
Late Paleozoic and Mesozoic radiolarian fossils from the Chichibu Accretionary Complex in the western area of Lake Hamana, central Japan.
丹羽, 耕輔
大塚, 勉
Chichibu Terrane
radiolaria
Permian
Triassic
Jurassic
accretionary complex
melange
deformation
The accretionary complex of the Chichibu Terrane in the western Lake Hamana area is divided into three tectonic units (Units A, B and C) on the basis of lithology and structure. Among them, the Units A and B are melanges comprising chert, basalt and limestone blocks and mudstone matrices. The Unit C is an accumulation of large-scale rock slabs of limestone and basalt. The Units A and C are characterized by horizontal accumulation structure of the slabs and well-developed cleavage. Although the Unit B steeply inclines in usual, rocks of the unit show less deformation than other units. Late Middle and late Middle to early Late Jurassic radiolarians are obtained from chert and siliceous mudstone respectively in the Unit A. Chert of the Unit B yields Early Permian and Middle Triassic radiolarians. Middle to late Middle Jurassic radiolarians are found in mudstone and other pelitic rocks of the Unit B. The fossile evidences suggest that the Unit A is correlative with the Togano Unit of the Southern Chichibu Terrane in radiolarian age.
Article
信州大学理学部紀要 36(2): 77-93(2002)
departmental bulletin paper
信州大学理学部
2002-03-29
application/pdf
信州大学理学部紀要
2
36
77
93
0583-063X
AA00697923
https://soar-ir.repo.nii.ac.jp/record/12020/files/Science36-02-03.pdf
jpn