十和田火山中掫テフラ層の分布,粒度組成,年代

• 早川 由紀夫

  東京大学地震研究所

書誌事項

タイトル別名

• Chuseri Tephra Formation from Towada Volcano, Japan
• トワダ カサンチュウ ソウ テフラソウ ノ ブンプ リュウド ソセイ ネンダイ

抄録

The Chuseri pumice is a widespread Holocene dacitic tephra layer erupted from the Nakano Umi crater in the Towada caldera. The pumice is directly overlain by the Kanegasawa bedded pumice and Utarube ash. The Chuseri pumice. Kanegasawa pumice, and Utarube ash define the Chuseri tephra formation. Volumes are calculated using isopach maps to be 6.5 km^3 for the Chuseri pumice, 1.2 km³ for the Kanegasawa pumice, and 0.9 km³ for the Utarube ash. Plots of the areas enclosed by the isopleths of maximum pumice size and maximum lithic size show the Chuseri pumice to be an average plinian eruption product. The Utarube ash is an ash-fall deposit containing accretionary lapilli and is interbedded with surge deposit near source area. Grainsize characteristics of the Chuseri pumice are described. Like other plinian deposits, the Chuseri pumice does not contain an appreciable amount of fine ash (finer than 1/16mm), at least, as far as 45 km from the source vent. A new radiocarbon date (GaK-9761) on charcoal from within the Chuseri pumice deposit establishes an age for the eruption of 5,390±140 years B.P.

収録刊行物

• 火山.第２集

  火山.第２集 28 (3), 263-273, 1983

  特定非営利活動法人 日本火山学会

詳細情報

• CRID: 1390282681100919424
• NII論文ID: 110002994087
• NII論文ID: 10004720139
• NII書誌ID: AN10512786
• ISSN: 04534360
• ISSN: 24330590
• DOI: 10.18940/kazanc.28.3_263
• NDL書誌ID: 2606679
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I2606679
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可