北海道屈斜路カルデラ中島火山の噴火年代

• 後藤 芳彦

  室蘭工業大学くらし環境系領域

• 和田 恵治

  北海道教育大学旭川校

書誌事項

タイトル別名

• Eruption Age of Nakajima Volcano at Kutcharo Caldera, Hokkaido, Japan: Tephrochronology of Nakajima Pumice
• 北海道屈斜路カルデラ中島火山の噴火年代 : 中島軽石のテフロクロノロジー
• ホッカイドウ クッシャロ カルデラ ナカジマ カザン ノ フンカ ネンダイ : ナカジマ カルイシ ノ テフロクロノロジー
• ─中島軽石のテフロクロノロジー─

抄録

 Kutcharo caldera is situated in the eastern part of Hokkaido, Japan. It is subcircular with a diameter of 20-26 km and was formed by repeated violent rhyolitic explosive eruptions from 340 to 35 ka. The caldera has three post-caldera volcanoes: Atosanupuri, Nakajima and Mashu. Our new tephrostratigraphical survey suggests that a pyroclastic fall deposit (Nakajima pumice), which was extruded from Nakajima, is exposed at the western slope of Atosanupuri. The deposit comprises dacitic pumice clasts (< 9 cm across) in a fine-grained matrix. The pumice clasts are coated with fine-grained ash, suggesting the deposit was produced by a phreatomagmatic eruption. The deposit directly overlies a scoria-fall deposit, which was ejected from Mashu volcano at 17-12 ka, and is overlain by Ma-k tephra, which was extruded from Mashu volcano at 10 ka. The stratigraphy of the deposit suggests that a phreatomagmatic eruption occurred at Nakajima volcano between 17 and 10 ka.

収録刊行物

• 地学雑誌

  地学雑誌 127 (2), 157-173, 2018-04-25

  公益社団法人 東京地学協会

キーワード

• 屈斜路カルデラ
• 中島火山
• テフラ
• 層序
• 噴火史
• 中島軽石

詳細情報

• CRID: 1390001288037630592
• NII論文ID: 130007395817
• NII論文ID: 40021559439
• NII書誌ID: AN00322536
• DOI: 10.5026/jgeography.127.157
• ISSN: 18840884
• ISSN: 0022135X
• NDL書誌ID: 029017769
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I029017769
• Web Site: https://www.jstage.jst.go.jp/article/jgeography/127/2/127_127.157/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可