2024-03-28T08:17:37Z
https://niigata-u.repo.nii.ac.jp/oai
oai:niigata-u.repo.nii.ac.jp:00026806
2022-12-15T03:56:41Z
154:155:391:400
453:456
Correlation of the late Pliocene Mushono-Shiraiwa Tephra Beds in the Kobiwako and Kakegawa Groups to the Kyp-NAll-Jwg4 Tephra Beds in the Niigata region, central Japan
Correlation of the late Pliocene Mushono-Shiraiwa Tephra Beds in the Kobiwako and Kakegawa Groups to the Kyp-NAll-Jwg4 Tephra Beds in the Niigata region, central Japan
黒川, 勝己
157473
大橋, 明美
157474
樋口, 裕也
157475
里口, 保文
157476
correlation
Mushono Tephra Bed
Shiraiwa Tephra Bed
Kyp
Nkw
Sgs
NAll
Jwg-4
Kobiwako Group
Niigata region
widespread tephra
subaqueous fallout
late Pliocene
central Japan
The correlation of the late Pliocene Mushono Tephra Bed in the Kobiwako Group, the Shiraiwa Tephra Bed in the Kakegawa Group and the Kyp, NAll, Jwg-4 and their correlative Tephra Beds in the Niigata region was performed. The correlation of the Mushono Tephra Bed to the Shiraiwa Tephra Bed was also confirmed by chemical composition of glass shards, especially on the FeO contents of 1.6-1.8% in average. The Mushono-Shiraiwa Tephra Bed was correlative to the Nkw and Dgc Tephra Beds in the Tomikura area, eastern Arai City, the Kyp Tephra Bed in the Higashikubiki area, the Sgs Tephra Bed in the Hachikoku area, the NAll Tephra Bed in the Ojiya area and the Jwg-4 Tephra Bed in the Chuo and Nishiyama Oil Fields. These tephra beds commonly have primary pyroclastic deposits at the base of the beds that can be interpreted as subaqueous fallout origin. These correlative tephras in central Japan cover more than 300x250Km^2 area, which implies one of the prominent eruptions in late Pliocene around 2.35Ma. The source volcanic area can be supposed in the northern Chubu Mountains based on the distribution of the deposits.
departmental bulletin paper
新潟大学教育人間科学部
2004-02
application/pdf
新潟大学教育人間科学部紀要 自然科学編
2
6
107
120
新潟大学教育人間科学部紀要 自然科学編
AA11276235
13442961
https://niigata-u.repo.nii.ac.jp/record/26806/files/KJ00004261759.pdf
eng