玄武岩質火山成長に伴うカルデラ形成--重力崩壊モデル(特集 三宅島2000年噴火と神津島・新島周辺の地震活動)

• 資料種別: 記事
• タイトル: 玄武岩質火山成長に伴うカルデラ形成--重力崩壊モデル
• 著者・編者: 高田 亮
• シリーズタイトル: 特集 三宅島2000年噴火と神津島・新島周辺の地震活動
• 著者標目: 高田 亮
• タイトル（掲載誌）: 地学雑誌
• 巻号年月日等（掲載誌）: 110(2) (通号 975) 2001
• 掲載巻: 110
• 掲載号: 2
• 掲載通号: 975
• 掲載ページ: 245～256
• 掲載年月日（W3CDTF）: 2001
• ISSN（掲載誌）: 0022-135X
• ISSN-L（掲載誌）: 0022-135X
• 出版事項（掲載誌）: 東京 : 東京地学協会
• 出版地（国名コード）: JP
• 本文の言語コード: jpn
• 件名標目: basaltic volcano; caldera; instability; gravitational collapse; Galapagos; Hawaii; Miyakejima; 不安定; ガラパゴス; ハワイ; 三宅島
• NDLC: ZM41
• 対象利用者: 一般
• コレクション（個別）: 国立国会図書館デジタルコレクション > 電子書籍・電子雑誌 > 学術機関 > 学協会; https://dl.ndl.go.jp/collections/B00043
• オンライン閲覧公開範囲: インターネット公開
• 遠隔複写可否（NDL）: 不可
• 所蔵機関: 国立国会図書館
• 請求記号: Z15-169
• 関連情報（URI）: http://dl.ndl.go.jp/info:ndljp/pid/8766586
• 関連情報（国立国会図書館永続的識別子）: info:ndljp/pid/8766586; http://dl.ndl.go.jp/info:ndljp/pid/8766586
• 連携機関・データベース: 国立国会図書館 : 国立国会図書館雑誌記事索引; https://ndlsearch.ndl.go.jp
• 書誌ID（NDLBibID）: 5776565; http://id.ndl.go.jp/bib/5776565
• 整理区分コード: 632

• 要約等: Basaltic volcanoes above oceanic crust or island-arc crusts develop calderas. Upon the formation of this caldera, the collapsed volume was generally far larger than erupted volume. Caldera width, its depth, and caldera horizontal width (CR) / volcano size (VR) depend on the physical properties of an oceanic crust. The CR/VR ratio decreases away from the ridge. At Fernandina volcano, Galapagos, the elongated caldera of 3.5 km × 2.5 km was formed in 1968 during a phase dominated by circumferential fissure eruptions after a phase dominated by radial fissure eruptions. At Kilauea volcano, Hawaii, during a phase dominated by central eruptions, several drain backs of lava lake ccurred from 1800, and, finally, a caldera of 1 km in diameter collapsed in 1924. Caldera collapse seems to be inevitable because accumulated crystals and solidified magma under a volcano increases gravitational instability. According to the gravitational collapse model proposed in this paper, it is difficult to determine when, how wide, and how deep a caldera collapse will occur. The magma plumbing system expands horizontally and vertically during long-term growth. Caldera collapse should contribute to vertical growth. Horizontal growth and vertical growth are governed by physical properties of the crust beneath the volcano; the former process is dominant in Hawaii, and the latter in Galapagos. In the case of Miyakejima volcano, the caldera collapse may be triggered by dike intrusions into a region with a low probability of intrusions or by an increase in the magma supply beneath the magma chamber. At the Miyakejima eruption in 2000, the caldera of 1.5 km in diameter formed in the shallow crust; ductile mass or dense magma with crystal mush may have moved downward or northwestward in the deep crust.
• DOI: 10.5026/jgeography.110.2_245
• オンライン閲覧公開範囲: インターネット公開
• 連携機関・データベース: 科学技術振興機構 : J-STAGE; http://www.jstage.jst.go.jp

• 要約等: Basaltic volcanoes above oceanic crust or island-arc crusts develop calderas. Upon the formation of this caldera, the collapsed volume was generally far larger than erupted volume. Caldera width, its depth, and caldera horizontal width (CR) / volcano size (VR) depend on the physical properties of an oceanic crust. The CR/VR ratio decreases away from the ridge. At Fernandina volcano, Galapagos, the elongated caldera of 3.5 km × 2.5 km was formed in 1968 during a phase dominated by circumferential fissure eruptions after a phase dominated by radial fissure eruptions. At Kilauea volcano, Hawaii, during a phase dominated by central eruptions, several drain backs of lava lake ccurred from 1800, and, finally, a caldera of 1 km in diameter collapsed in 1924. Caldera collapse seems to be inevitable because accumulated crystals and solidified magma under a volcano increases gravitational instability. According to the gravitational collapse model proposed in this paper, it is difficult to determine when, how wide, and how deep a caldera collapse will occur. The magma plumbing system expands horizontally and vertically during long-term growth. Caldera collapse should contribute to vertical growth. Horizontal growth and vertical growth are governed by physical properties of the crust beneath the volcano; the former process is dominant in Hawaii, and the latter in Galapagos. In the case of Miyakejima volcano, the caldera collapse may be triggered by dike intrusions into a region with a low probability of intrusions or by an increase in the magma supply beneath the magma chamber. At the Miyakejima eruption in 2000, the caldera of 1.5 km in diameter formed in the shallow crust; ductile mass or dense magma with crystal mush may have moved downward or northwestward in the deep crust.
• DOI: 10.5026/jgeography.110.2_245; https://doi.org/10.5026/jgeography.110.2_245
• 関連情報（URI）: http://id.ndl.go.jp/bib/5776565; https://ndlsearch.ndl.go.jp/books/R000000004-I5776565; https://dl.ndl.go.jp/pid/8766586
• 参照: 八丈島における｀２２２´Ｒｎ散逸率の評価とその大気中濃度への影響; https://cir.nii.ac.jp/crid/1390001204288322560; インドネシア・スンダ弧におけるカルデラ噴火とカルデラ火山の特徴; https://cir.nii.ac.jp/crid/1390001206237459968
• 連携機関・データベース: 国立情報学研究所 : CiNii Research; https://cir.nii.ac.jp/
• 提供元機関・データベース: Japan Link Center; https://japanlinkcenter.org/top; 雑誌記事索引データベース; https://ndlsearch.ndl.go.jp; Crossref; https://www.crossref.org; CiNii Articles
• 書誌ID（NDLBibID）: 5776565; http://id.ndl.go.jp/bib/5776565
• NII論文ID: 110000379926; 10010519820