Permeability-control on volcanic hydrothermal system : case study for Mt. Tokachidake, Japan, based on numerical simulation and field observation

• 資料種別: 記事
• タイトル: Permeability-control on volcanic hydrothermal system : case study for Mt. Tokachidake, Japan, based on numerical simulation and field observation
• 著者・編者: Ryo Tanaka; Takeshi Hashimoto; Nobuo Matsushima
• 出版事項: 日本 : Springer Nature
• 出版年月日等: 2017-03-08
• 出版年（W3CDTF）: 2017-03-08
• タイトル（掲載誌）: EPS : Earth, Planets and Space
• 巻号年月日等（掲載誌）: 69(39)
• 掲載巻: 69(39)
• ISSN（掲載誌）: 1880-5981
• ISSN-L（掲載誌）: 1343-8832
• 本文の言語コード: eng
• DOI: 10.1186/s40623-017-0623-5; https://doi.org/10.1186/s40623-017-0623-5
• 国立国会図書館永続的識別子: info:ndljp/pid/10319690; https://dl.ndl.go.jp/pid/10319690
• コレクション（共通）: 障害者向け資料
• コレクション（障害者向け資料：レベル1）: テキストデータ
• 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 > その他; https://dl.ndl.go.jp/collections/B00035
• 収集根拠: オンライン資料収集制度
• 受理日（W3CDTF）: 2017-04-04T20:19:14+09:00
• 保存日（W3CDTF）: 2017-03-24
• 記録形式（IMT）: application/pdf
• オンライン閲覧公開範囲: 国立国会図書館内限定公開
• デジタル化資料送信: 図書館・個人送信対象外
• 遠隔複写可否（NDL）: 可
• 掲載誌（URI）: http://earth-planets-space.springeropen.com/articles
• 掲載誌（国立国会図書館永続的識別子）: info:ndljp/pid/10319651; https://dl.ndl.go.jp/pid/10319651
• 連携機関・データベース: 国立国会図書館 : 国立国会図書館デジタルコレクション; https://dl.ndl.go.jp

• 要約等: We investigate a volcanic hydrothermal system by using numerical simulation with three key observables as reference: the magnetic total field, vent temperature, and heat flux. We model the shallow hydrothermal system of Mt. Tokachidake, central Hokkaido, Japan, as a case study. At this volcano, continuous demagnetization has been observed since at least 2008, suggesting heat accumulation beneath the active crater area. The surficial thermal manifestation has been waning since 2000. We perform numerical simulations of heat and mass flow within a modeled edifice at various conditions and calculate associated magnetic total field changes due to the thermomagnetic effect. We focus on the system’s response for up to a decade after permeability is reduced at a certain depth in the modeled conduit. Our numerical simulations reveal that (1) conduit obstruction (i.e., permeability reduction in the conduit) tends to bring about a decrease in vent temperature and heat flux, as well as heat accumulation below the level of the obstruction, (2) the recorded changes cannot be consistently explained by changing heat supply from depth, and (3) caprock structure plays a key role in controlling the location of heating and pressurization. Although conduit obstruction may be caused by either physical or chemical processes in general, the latter seems more likely in the case of Mt. Tokachidake.
• DOI: 10.1186/s40623-017-0623-5; https://doi.org/10.1186/s40623-017-0623-5
• オンライン閲覧公開範囲: インターネット公開
• 著作権情報: Creative Commons Attribution 4.0 International
• 関連情報（URI）: https://hdl.handle.net/2115/67560; http://id.ndl.go.jp/digimeta/10319690; https://dl.ndl.go.jp/pid/10319690; http://link.springer.com/content/pdf/10.1186/s40623-017-0623-5.pdf; http://link.springer.com/article/10.1186/s40623-017-0623-5/fulltext.html; http://hdl.handle.net/2115/67560
• 参照: Sulfur dioxide flux measurement at Mount Tokachi, Japan, with TROPOspheric Monitoring Instrument; https://cir.nii.ac.jp/crid/1360017279880712064; Significance of Electromagnetic Surveys at Active Volcanoes: Toward Evaluating the Imminence of Wet Eruptions; https://cir.nii.ac.jp/crid/1390001288144285440; Comparative Petrological Studies of 1962 and 1988–1989 Eruptions of Tokachidake Volcano, Japan: A Case Study for Understanding the Relationship Between Eruption Style and Magma Processes; https://cir.nii.ac.jp/crid/1390282763132700928; 火山の活動不安定評価における熱消磁現象の活用と噴火予測の可能性; https://cir.nii.ac.jp/crid/1390290879762527872; Quantitative relationship between plume emission and multiple deflations after the 2014 phreatic eruption at Ontake volcano, Japan; https://cir.nii.ac.jp/crid/2050307417117557248
• 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: 学術機関リポジトリデータベース; https://irdb.nii.ac.jp; 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）: 10319690; http://id.ndl.go.jp/bib/10319690
• NII論文ID: 120006360154