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Collaborative study between Japan and Philippine on volcanic and geothermal history of Irosin caldera, south Luzon, Philippine

Research Project

Project/Area Number 21401005
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section海外学術
Research Field Geography
Research InstitutionFukuoka University

Principal Investigator

OKUNO Mitsuru  福岡大学, 理学部, 教授 (50309887)

Co-Investigator(Kenkyū-buntansha) TAGUCHI Sachihiro  福岡大学, 理学部, 教授 (00108771)
KOBAYASHI Tetsuo  鹿児島大学, 大学院・理工学研究科, 教授 (70112430)
Co-Investigator(Renkei-kenkyūsha) MORIYA Ichio  金沢大学, 文学部, 名誉教授 (50052494)
NAKAMURA Toshio  名古屋大学, 年代測定総合研究センター, 教授 (10135387)
TAKASHIMA Isao  秋田大学, 工学資源学部, 名誉教授 (50163192)
Project Period (FY) 2009 – 2011
Project Status Completed (Fiscal Year 2011)
Budget Amount *help
¥14,560,000 (Direct Cost: ¥11,200,000、Indirect Cost: ¥3,360,000)
Fiscal Year 2011: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2010: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2009: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Keywordsイロシン / カルデラ / 年代測定 / 地熱変質 / 噴火史 / ボーリング掘削 / テフロクロノロジー / 火砕流
Research Abstract

Irosin caldera is located at the southeastern end of Luzon Island, Philippines. Bulusan volcano is a post-caldera cone. To reveal the sequence of the Irosin caldera eruption and the eruptive history of post-caldera volcanism, we conducted a collaborative project with PHIVOLCS. A small lava dome and ash-fall deposits were erupted as forerunners of the main caldera-forming eruption. The first stage of the caldera eruption was the plinian, which occurred shortly before the main ignimbrite eruption. The second stage of the eruption was the formation of the Irosin ignimbrite which can be divided into two units ; the lower fine unit and the upper coarse unit. The fine rhyolitic ash-fall deposit exposed in the summit crater of Inascan cone 80 km from the caldera is regarded as a co-ignimbrite ash-fall associated with the Irosin ignimbrite. Cummingtonite phenocrysts were identified in the Irosin ignimbrite and related deposits. Cored sediments obtained from the caldera are composed mainly of lahar deposits. Rhyolitic to andesitic ashes are intercalated with the sediments. One of them has similar petrographic characteristics with the Irosin ignimbrite. Recent volcanic ash from Bulusan volcano is composed of accessory materials, which involves gypsum. Chemistry and isotopic composition of hot springs distributed around Bulusan volcano suggests that all of the hot springs are dominant in HCO_3 suggesting a steam-heated type of water.

Report

(4 results)
  • 2011 Annual Research Report   Final Research Report ( PDF )
  • 2010 Annual Research Report
  • 2009 Annual Research Report
  • Research Products

    (12 results)

All 2012 2011 2010 2009 Other

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (6 results) Remarks (1 results)

  • [Journal Article] Eruptions of Bulusan Volcano since November 20102011

    • Author(s)
      Okuno, M., Laguerta, E. P., Delos Reyes, P. J., Bornas, M. A. V., Mirabueno, M. H. T., Arpa, M. C. B., Bariso, E., Solidum, R. U. Jr., Taguchi, S., Torii, M. and Kobayashi, T.
    • Journal Title

      The Journal of the Geological Society of Japan

      Volume: 117巻

    • NAID

      130003363851

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] The Irosin co-ignimbrite ash-fall deposit : a widespread tephra marker in the Bicol arc, south Luzon, Philippines2011

    • Author(s)
      Mirabueno, M. H. T., Okuno, M., Torii, M., Danhara, T., Laguerta, E. P., Newhall, C. G. and Kobayashi, T.
    • Journal Title

      Quaternary International

      Volume: Vol.246 Pages: 289-295

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] The Irosin co-ignimbrite ash-fall deposit : a widespread tephra marker in the Bicol arc, south Luzon, Philippines2011

    • Author(s)
      Mirabueno, M.H.T., Okuno, M., 他5名
    • Journal Title

      Quaternary International

      Volume: 246巻 Issue: 1-2 Pages: 289-295

    • DOI

      10.1016/j.quaint.2011.08.043

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Eruptions of Bulusan Volcano since November 20102011

    • Author(s)
      Okuno, M., 他10名
    • Journal Title

      The Journal of the Geological Society of Japan

      Volume: 117巻

    • NAID

      130003363851

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] テフラ編年学の多様な役割:フィリピン,中国,韓国,日本,アリューシャン列島の研究例

    • Author(s)
      奥野充
    • Journal Title

      第四紀研究

      Volume: 51巻(印刷中)

    • NAID

      10030973036

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Presentation] フィリピン,イロシンカルデラとブルサン火山の噴火史研究2012

    • Author(s)
      奥野充, 他8名
    • Organizer
      日本地理学会2012年春季学術大会
    • Place of Presentation
      首都大学東京
    • Year and Date
      2012-03-28
    • Related Report
      2011 Annual Research Report
  • [Presentation] イロシンカルデラとブルサン火山の噴火史研究2012

    • Author(s)
      奥野充・Mirabueno, M. H. T.・Laguerta, E. P.・Delos Reyes, P. J.・Bornas, M. A. V.・高島勲・鳥井真之・檀原徹・小林哲夫, フィリピン
    • Organizer
      日本地理学会2012年春季学術大会
    • Place of Presentation
      首都大学東京
    • Year and Date
      2012-03-08
    • Related Report
      2011 Final Research Report
  • [Presentation] The Irosin co-ignimbrite deposits : discovery of a widespread tephra in the Philippines. International Field Conference and Workshop on Tephrochronology2010

    • Author(s)
      Mirabueno, M. H. T., Okuno, M., Nakamura, T., Torii, M., Danhara, T., Laguerta, E. P., Newhall, C. G. and Kobayashi, T.
    • Organizer
      Volcanism and Human Activity "Active Tephra in Kyushu, 2010"
    • Place of Presentation
      Kirishima City, Kagoshima, Japan
    • Year and Date
      2010-05-11
    • Related Report
      2011 Final Research Report
  • [Presentation] The Irosin co-ignimbrite deposits : discovery of a widespread tephra in the Philippines2010

    • Author(s)
      M.H.T.Mirabueno, M.Okuno, T.Nakamura, M.Torii, T.Danhara, E.P.Laguerta, C.G.Newhall, T.Kobayashi
    • Organizer
      International Field Conference and Workshop on Tophrochronology, Volcanism and Human Activity Active Tephra in Kyushu, 2010
    • Place of Presentation
      鹿児島県霧島市
    • Year and Date
      2010-05-11
    • Related Report
      2010 Annual Research Report
  • [Presentation] AMS radiocarbon dating for the Irosin ignimbrite and co-ignimbrite ash-fall, southern Luzon, Philippines2009

    • Author(s)
      Mirabueno, M. H. T., Okuno, M., Nakamura, T., Danhara, T., Laguerta, E. P., Newhall, C. G. and Kobayashi, T.
    • Organizer
      20th International Radiocarbon Conference
    • Place of Presentation
      Big Island, Hawaii
    • Year and Date
      2009-06-02
    • Related Report
      2011 Final Research Report
  • [Presentation] AMS radiocarbon dating for the Irosin ignimbrite and co-ignimbrite ash-fall, southern Luzon, Philippines2009

    • Author(s)
      MHT.Mirabueno, M.Okuno, T.Nakamura, T.Danhara, E.P.Laguerta, C.G.Newhall, T.Kobayashi
    • Organizer
      21th Radiocarbon Conference
    • Place of Presentation
      アメリカ合衆国, ハワイ
    • Year and Date
      2009-06-02
    • Related Report
      2009 Annual Research Report
  • [Remarks] 多島域フォーラム「フィリピン共和国、イロシンカルデラの火山・地熱活動史に関する研究会」の要旨集

    • URL

      http://cpi.kagoshima-u.ac.jp/2nd_Meeting_PROGRAM.pdf

    • Related Report
      2010 Annual Research Report

URL: 

Published: 2009-04-01   Modified: 2016-04-21  

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