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Development and application of new methods for calculating magma mixing timescales

Research Project

Project/Area Number 19K23471
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0204:Astronomy, earth and planetary science, and related fields
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

Conway Christopher  国立研究開発法人産業技術総合研究所, 地質調査総合センター, 研究員 (50844619)

Project Period (FY) 2019-08-30 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsmagma mixing / eruption time scales / volcanic hazards / diffusion chronometry / active volcanoes
Outline of Research at the Start

This research project will develop and apply new methods for calculating mineral diffusion timescales for samples from recent eruptions in Japan to explore the key question: how long does it take for magma mixing to trigger a volcanic eruption? This methodology will be practiced on olivine and
orthopyroxene crystals in samples from the recent eruptions of Miyakejima (2000) and Shinmoedake (2011) to constrain the timescales of magma mixing processes that triggered these explosive events.

Outline of Final Research Achievements

Chemical data was collected for volcanic crystals in lava and tephra from recent eruptions at Miyakejima volcano, Japan. Time scale constraints from the crystals indicate that magma moved rapidly from its source to the eruption vent over a period of 1-5 days prior to the eruption in 1874 AD, and 12-25 days prior to the eruption in 2000 AD. These constraints closely match reports of corresponding increases in seismicity before the two eruptions, and indicate that volcanic crystals provide valuable information regarding the warning and evacuation time periods before eruptions.

Academic Significance and Societal Importance of the Research Achievements

将来の火山災害から社会を守るためには、マグマの移動から噴火までの潜在的な期間を知る必要があります。 この研究の結果は、三宅島では山腹火口の溶岩噴火は、火山活動開始から数日で発生する可能性があるが、山頂噴火の前には数週間にわたる前兆現象が続く可能性があることを示している。 この研究は、危機管理者に対して、火山噴火に備る際必要な火山活動の時間スケールについての情報を提供するために、マグマ中の結晶の分析が役立つ可能性を示しています。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (9 results)

All 2023 2022 2021 2020

All Journal Article (4 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (5 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results)

  • [Journal Article] Caldera collapse thresholds correlate with magma chamber dimensions2023

    • Author(s)
      Geshi Nobuo、Miyagi Isoji、Saito Genji、Conway Chris E.
    • Journal Title

      Scientific Reports

      Volume: 13 Issue: 1 Pages: 1-9

    • DOI

      10.1038/s41598-023-34411-5

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Petrogenesis of isotopically enriched Quaternary magma with adakitic affinity associated with subduction of old lithosphere beneath central Myanmar2022

    • Author(s)
      Sano Takashi、Tani Kenichiro、Yoneda Shigekazu、Min Hla、Htike Thaung、Maung Thein Zin Maung、Ishizuka Osamu、Kusuhashi Nao、Kono Reiko T.、Takai Masanaru、Conway Chris E.
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 1-11

    • DOI

      10.1038/s41598-022-07097-4

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Evolution of the magma plumbing system of Miyakejima volcano with periodic recharge of basaltic magmas2022

    • Author(s)
      Geshi Nobuo、Oikawa Teruki、Weller Derek J.、Conway Chris E.
    • Journal Title

      Earth, Planets and Space

      Volume: 74 Issue: 1 Pages: 20-20

    • DOI

      10.1186/s40623-022-01577-7

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Rapid assembly of high-Mg andesites and dacites by magma mixing at a continental arc stratovolcano2020

    • Author(s)
      Conway, C.E., Chamberlain, K.J., Harigane, Y., Morgan, D.J., Wilson, C.J.N.
    • Journal Title

      Geology

      Volume: 48 Issue: 10 Pages: 1033-1037

    • DOI

      10.1130/g47614.1

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] The effect of sector collapse on the magmatic plumbing system of Oshima-Oshima volcano, NW Japan2023

    • Author(s)
      Conway, C.E., Ishizuka, O., Katayama, H., Kataoka, K., Maeno, F.
    • Organizer
      International Association of Volcanology and Chemistry of Earth’s Interior, Scientific Assembly
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Collection and integration of crystal orientation and composition data for diffusion chronometry studies2021

    • Author(s)
      Conway, C.E., Harigane, Y., Geshi, N., Saito, G.
    • Organizer
      Volcanological Society of Japan, Annual Meeting
    • Related Report
      2021 Research-status Report
  • [Presentation] Timescales of magmatic processes related to the AD 2000 eruptions at Miyakejima, Japan2020

    • Author(s)
      Conway, C.E., Geshi, N., Harigane, Y., Saito, Tomiya, A.
    • Organizer
      Japan Geoscience Union, Annual Meeting
    • Related Report
      2020 Research-status Report
  • [Presentation] The types and tempos of magmatic processes that preceded historic eruptions at Miyakejima volcano, Japan2020

    • Author(s)
      Conway, C.E., Geshi, N., Harigane, Y., Saito, G., Weller, D., Aoki, Y.
    • Organizer
      American Geophysical Union, Annual Meeting
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Petrology, magma mixing, mush mobilization, and timescales of the 1874 A.D. Meiji Eruption of Miyakejima, Japan2020

    • Author(s)
      Weller, D., Aoki, Y., Geshi, N., Conway, C.E., Sakata, S., Yasuda, A., Gresse, M., Hokanishi, N., Harigane, Y.
    • Organizer
      American Geophysical Union, Annual Meeting
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research

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Published: 2019-09-03   Modified: 2024-01-30  

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