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Monitoring of temperature in hydrothermal reservoir using gaseous elemental mercury

Research Project

Project/Area Number 18H01290
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 17030:Human geosciences-related
Research InstitutionTokyo Institute of Technology

Principal Investigator

TERADA AKIHIKO  東京工業大学, 理学院, 准教授 (00374215)

Co-Investigator(Kenkyū-buntansha) 大場 武  東海大学, 理学部, 教授 (60203915)
Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥10,010,000 (Direct Cost: ¥7,700,000、Indirect Cost: ¥2,310,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywords火山 / 水蒸気噴火 / 気体単体水銀 / 側噴火 / 草津白根山 / 土壌気体水銀 / 火山噴火 / 火山モニタリング / 熱水系 / 火山防災 / 破砕帯 / ヘリウム同位体比 / 草津白根火山 / 水蒸気爆発 / 気体水銀(GEM) / モニタリング / 地下浅部温度
Outline of Final Research Achievements

The relation between mercury emission rates (φ) and temperature at the site RH was found to satisfy the Arrehenius equation, however, φ changes depending on the underground temperature (Tg), not the chamber temperature (Tc). Although ln(φ) changes linearly against Tc^-1 (Arrehenius equation), we can clearly see that the intercepts of the Arrehenius plot is different for the data recorded on morning (temperature increased with time) and evening (temperature decreased with time). The mechanisim for the difference in intercept is interpreted as a delayed response of the subsurface temperature (Tg) to the change in chamber temperature (Tc). On the basis of the consideration using the heat conduction equation, mercury emission rates (φ) changes depending on the ground temperature at a depth of two centimeters. Using the empirical relation obtained in this study, we modified the spatial distribution and temporal changes in GEM emission rate from volcanoes.

Academic Significance and Societal Importance of the Research Achievements

活火山で発生する水蒸気噴火は,周辺 1-2 km 以内に大きな噴石を落下させ,そこに滞在している登山者や事業者に甚大な被害を与える.本研究では,水蒸気噴火に先行する地下温度上昇を,地表において気体水銀放出率を観測することで検出する新しい方法を構築した.本研究の主たる成果は,水銀放出率に影響する地表面付近の温度効果を定量的に明らかにしたことである.この知見に基づき,火山活動としての水銀放出を高い信頼性のもとでモニタリングが可能となる.今後は草津白根山などの火山において実際の観測に適用することで,本手法の有効性を実証的に検討する.

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (19 results)

All 2022 2021 2020 2019 2018

All Journal Article (6 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 6 results,  Open Access: 6 results) Presentation (13 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Journal Article] The 2018 phreatic eruption at Mt. Motoshirane of Kusatsu-Shirane volcano, Japan: eruption and intrusion of hydrothermal fluid observed by a borehole tiltmeter network2021

    • Author(s)
      Terada Akihiko、Kanda Wataru、Ogawa Yasuo、Yamada Taishi、Yamamoto Mare、Ohkura Takahiro、Aoyama Hiroshi、Tsutsui Tomoki、Onizawa Shin’ya
    • Journal Title

      Earth, Planets and Space

      Volume: 73 Issue: 1 Pages: 157-157

    • DOI

      10.1186/s40623-021-01475-4

    • NAID

      120007166069

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Air-Fall Ash from the Main Crater of Asama Volcano on August 7, 2019, and its Water-Soluble Components2020

    • Author(s)
      Yaguchi Muga、Terada Akihiko、Ogawa Yasuo、Volcanology Research Department, Meteorological Research Institute, Japan Meteorological Agency 1-1 Nagamine, Tsukuba, Ibaraki 305-0052, Japan、Volcanic Fluid Research Center, School of Science, Tokyo Institute of Technology, Tokyo, Japan
    • Journal Title

      Journal of Disaster Research

      Volume: 15 Issue: 1 Pages: 53-56

    • DOI

      10.20965/jdr.2020.p0053

    • NAID

      130007793971

    • ISSN
      1881-2473, 1883-8030
    • Year and Date
      2020-02-01
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Anatomy of active volcanic edifice at the Kusatsu?Shirane volcano, Japan, by magnetotellurics: hydrothermal implications for volcanic unrests2020

    • Author(s)
      Tseng Kuo Hsuan、Ogawa Yasuo、Nurhasan、Tank Sabri Bulent、Ujihara Naoto、Honkura Yoshimori、Terada Akihiko、Usui Yoshiya、Kanda Wataru
    • Journal Title

      Earth, Planets and Space

      Volume: 72 Issue: 1

    • DOI

      10.1186/s40623-020-01283-2

    • NAID

      120006936897

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Volcanological applications of unoccupied aircraft systems (UAS): Developments, strategies, and future challenges2020

    • Author(s)
      James Mike、Carr Brett、D'Arcy Fiona、Diefenbach Angela、Dietterich Hannah、Fornaciai Allesandro、Lev Einat、Liu Emma、Pieri David、Rodgers Mel、Smets Benoit、Terada Akihiko、von Aulock Felix、Walter Thomas、Wood Kieran、Zorn Edgar
    • Journal Title

      Volcanica

      Volume: 3 Issue: 1 Pages: 67-114

    • DOI

      10.30909/vol.03.01.67114

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Kusatsu-Shirane volcano as a site of phreatic eruptions2018

    • Author(s)
      寺田暁彦
    • Journal Title

      The Journal of the Geological Society of Japan

      Volume: 124 Issue: 4 Pages: 251-270

    • DOI

      10.5575/geosoc.2017.0060

    • NAID

      130007413090

    • ISSN
      0016-7630, 1349-9963
    • Year and Date
      2018-04-15
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Volcanic smoke reduction in visible and thermal infrared imagery2018

    • Author(s)
      Hashimoto Takeshi、Terada Akihiko、Tanaka Ryo
    • Journal Title

      Earth, Planets and Space

      Volume: 70 Issue: 1 Pages: 109-109

    • DOI

      10.1186/s40623-018-0886-5

    • NAID

      120006486810

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 火山における土壌拡散水銀放出率の精密測定2022

    • Author(s)
      髙橋祐希,寺田 暁彦
    • Organizer
      日本地球惑星科学連合2022年大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 草津白根火山・湯釜火口周辺における土壌ガス中のヘリウム同位体比分布‐潜在破砕帯検出の試み-2021

    • Author(s)
      若松 海,寺田暁彦,角野浩史,小長谷智哉,谷口無我,大場 武
    • Organizer
      日本火山学会2021年秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 火口周辺から放出される土壌ガスの起源ーヘリウム同位体比からの示唆ー2020

    • Author(s)
      髙橋昌孝・寺田暁彦・角野浩史・外山浩太郎・大場 武・鈴木 レオナ
    • Organizer
      日本地球惑星科学連合2020年大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 草津白根火山の火山ガスのヘリウム同位体比2020

    • Author(s)
      角野浩史・外山浩太郎・大場 武・谷口無我・寺田暁彦
    • Organizer
      日本地球惑星科学連合2020年大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Relationship between phreatic eruptions and the active hydrothermal system of Kusatsu-Shirane volcano, Japan2020

    • Author(s)
      Terada, A.
    • Organizer
      International Workshop on the mechanism of Phreatic Eruption
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 草津白根火山・湯釜火口周辺における土壌水銀放出帯2019

    • Author(s)
      寺田暁彦・水谷紀章
    • Organizer
      地球惑星科学連合大会2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] Source characteristics of demagnetization and ground deformation during inter-eruptive periods2019

    • Author(s)
      Hashimoto, T., Utsugi, M., Ohkura, T., Kanda, W., Terada, A., Miura, S. and Iguchi, M.
    • Organizer
      27th IUGG General Assembly
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 草津白根山(湯釜)の火山活動に対応した火山ガス組成変化2019

    • Author(s)
      風早竜之介・北川隆洋・大場 武・谷口無我・寺田暁彦・神田 径
    • Organizer
      日本火山学会秋季大会2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] 伊豆大島三原山火口底の火山ガス組成測定2019

    • Author(s)
      寺田暁彦・森 俊哉・大場 武・谷口無我・鬼澤真也・大野鷹士・森田裕一
    • Organizer
      日本火山学会秋季大会2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] Active magmatic-hydrothermal system beneath Yugama crater lake at Kusatsu-Shirane volcano, Japan: Temporal variations in subaqueous fumarolic activities2019

    • Author(s)
      Terada, A., Kuwahara, T.
    • Organizer
      IAVCEI Commission on Volcanic Lakes 2019
    • Related Report
      2018 Annual Research Report
  • [Presentation] 草津白根火山・白根火砕丘南側斜面における気体水銀放出域2018

    • Author(s)
      水谷紀章・寺田暁彦
    • Organizer
      日本火山学会2018年秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 草津白根火山・白根火砕丘周辺の浅部熱水系2018

    • Author(s)
      香取 慧・寺田暁彦・西野佳奈・沼波 望・大場 武
    • Organizer
      日本火山学会2018年秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 草津白根火山・本白根山で2018年1月23日に発生した噴火 -地球物理学的観測からの示唆-,2018

    • Author(s)
      寺田暁彦・神田 径・小川康雄・青山 裕・山本 希・筒井智樹・大倉敬宏・野口里奈
    • Organizer
      地球惑星科学連合大会2018年大会
    • Related Report
      2018 Annual Research Report

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Published: 2018-04-23   Modified: 2023-01-30  

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