阿寒カルデラとその周辺の重力構造

• 長谷川 健

• 山本 明彦

• 神山 裕幸

• 中川 光弘

書誌事項

タイトル別名

• Gravity　Structure of the Akan Caldera and Its Vicinity, Eastern Hokkaido, Japan
• アカンカルデラ ト ソノ シュウヘン ノ ジュウリョク コウゾウ

抄録

We performed gravity surveys and compiled pre-existing gravity data to obtain gravity anomalies of the Akan Caldera, eastern Hokkaido, and a new gravity map around the caldera was produced. In particular, we conducted gravity surveys on the frozen lake surface in winter to reveal a fine gravity structure. A new Bouguer anomaly map shows that the Akan Caldera is characterized by three closed mimima and takes its minimum value(～70mgal)in the central area of the caldera. It is consistent with our geologic studies suggesting that the Akan Caldera is multiple caldera. Characteristic low anomalies in the Akan Caldera gradually increase towards topographic rim outside and reach their maximum around the rims. Post-caldera volcanoes are distributed not along topographic caldera rim but along a periphery of the low-anomaly region, which is situated inside the topographic rim.

収録刊行物

• 北海道大学地球物理学研究報告

  北海道大学地球物理学研究報告 69 97-112, 2006-03-15

  北海道大学大学院理学研究科地球惑星科学専攻（地球物理学）

キーワード

• 450.12

詳細情報

• CRID: 1390009224794023168
• NII論文ID: 120000970582
• NII書誌ID: AN0008976X
• DOI: 10.14943/gbhu.69.97
• HANDLE: 2115/21503
• NDL書誌ID: 8631316
• ISSN: 04393503
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8631316
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • IRDB
  • NDL
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用可