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Challenge to 30 ppm TOC: Does carbon isotope analysis on pelagic chert possible only with popular method?

Research Project

Project/Area Number 16K13897
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Stratigraphy/Paleontology
Research InstitutionKanazawa University

Principal Investigator

Hasegawa Takashi  金沢大学, 地球社会基盤学系, 教授 (50272943)

Co-Investigator(Kenkyū-buntansha) 松岡 篤  新潟大学, 自然科学系, 教授 (00183947)
Research Collaborator Goto Akiko S.  
Hasebe Keiichiro  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords炭素同位体 / 古環境 / 層序 / 対比 / チャート / 炭素同位体比 / 質量分析 / 有機炭素 / 有機物 / 質量分析装置 / 微量分析 / 地球化学 / 地質学 / 環境分析 / 環境変動
Outline of Final Research Achievements

To achieve carbon isotope analysis on samples with very low TOC, the minimum amount of introduced carbon, and minimum TOC available for regular EA-IRMS analysis was investigated. Our regular EA-IRMS system could reproduce the results with 10 micro gram carbon or 0.025% TOC samples. Therefore, 0.025% TOC is concluded to be a minimum TOC for regular carbon isotope analysis with EA-IRMS system. For samples with TOC<0.025%, pre-sample treatment with hydrofluoric acid to reduce the volume of silicate is required for the use of EA-IRMS. Or the sample introduction portion of the analytical system should be reconstructed to reduce the dead volume.

Academic Significance and Societal Importance of the Research Achievements

TOCが小さい試料を漠然とEA-IRMS法で他試料と同様に分析しても,一応のデータは出てしまう.それをそのまま分析値として用いる研究者が散見されたが,そのような分析に信頼性がないことが改めてわかった.一方,標準試料量を変えて特別に分析シーケンスを構築するなどすれば,0.025% TOCでも十分実用的なデータを出し得ることも分かった.それ以下のTOCであれば,分析装置だけでなくサンプルを包む錫箔に含まれる炭素の影響などもあり,EA-IRMS法での分析は困難であることが判った.TOC=0.025%を目安としてフッ酸処理するものとしないものを見極めて,効率的に研究を進められるようになった.

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (20 results)

All 2018 2017 2016 Other

All Int'l Joint Research (1 results) Journal Article (10 results) (of which Int'l Joint Research: 8 results,  Peer Reviewed: 10 results,  Open Access: 6 results) Presentation (9 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Int'l Joint Research] 南京大学(中国)

    • Related Report
      2018 Annual Research Report
  • [Journal Article] Fractionation of stable nitrogen isotopes (<sup>15</sup>N/<sup>14</sup>N) during enzymatic deamination of glutamic acid: Implications for mass and energy transfers in the biosphere2018

    • Author(s)
      A.S Goto, M.T. Miura, T. Korenaga, T. Hasegawa, N. Ohkouchi, Y. Chikaraizhi
    • Journal Title

      GEOCHEMICAL JOURNAL

      Volume: 52 Issue: 3 Pages: 273-280

    • DOI

      10.2343/geochemj.2.0513

    • NAID

      130007379059

    • ISSN
      0016-7002, 1880-5973
    • Year and Date
      2018-05-30
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Tectonic, paleoclimate, and paleoceanographic history of high-latitude southern margins of Australia during the Cretaceous2018

    • Author(s)
      B.T. Huber, R.W. Hobbs, K.A. Bogus, and the Expedition 369 Scientists (Hasegawa, T. 順不同)
    • Journal Title

      International Ocean Discovery Program Expedition 369 Preliminary Report

      Volume: - Pages: 1-33

    • DOI

      10.14379/iodp.pr.369.2018

    • Related Report
      2018 Annual Research Report 2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Origin of methane and heavier hydrocarbons entrapped within Miocene methane-seep carbonates from central Japan2018

    • Author(s)
      Miyajima Yusuke、Ijiri Akira、Miyake Akira、Hasegawa Takashi
    • Journal Title

      Chemical Geology

      Volume: 498 Pages: 83-95

    • DOI

      10.1016/j.chemgeo.2018.09.014

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Depositional ages and characteristics of Middle-Upper Jurassic and Lower Cretaceous lacustrine deposits in southeastern Mongolia2018

    • Author(s)
      Hasegawa H., Ando H., Hasebe N., Ichinnorov N., Ohta T., Hasegawa T., Yamamoto M., Li G., Erdenetsogt, B., Heimhofer U., Murata T., Shinya H., Enerel G., Oyunjargal G., Munkhtsetseg O., Suzuki N., Irino T., Yamamoto K.
    • Journal Title

      Island Arc

      Volume: 27 Issue: 3 Pages: 1-17

    • DOI

      10.1111/iar.12243

    • Related Report
      2018 Annual Research Report 2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Cool eastern rim of the North Pacific during Late Cretaceous time; A seep-carbonate paleothermometry from the Nanaimo Group, British Columbia2017

    • Author(s)
      Jenkins, R.G., Hasegawa, T.(責任著者, 2番/4名) et al.
    • Journal Title

      Palaeogeography, Palaeoclimatology Palaeoecology

      Volume: 487 Pages: 407-415

    • DOI

      10.1016/j.palaeo.2017.09.027

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Excursion guide to the radiolarians of the East China Sea near Sesoko Island, Okinawa, Japan: An important research station for living radiolarian studies2017

    • Author(s)
      Matsuoka, A., Suzuki, N., Ito, T., Kimoto, K., Tuji, A., Ichinohe, R., Li, X.
    • Journal Title

      Science Reports of Niigata University (Geology)

      Volume: 32 Pages: 103-123

    • NAID

      120006762529

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Review of microfossil-bearing clasts within upper Mesozoic strata in East Asia: staged denudation of mid-Mesozoic accretionary complexes2017

    • Author(s)
      Ito, T., Sakai, Y., Feng, Q., Matsuoka, A.
    • Journal Title

      Ofioliti

      Volume: 42 Pages: 39-54

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Characterization ascertained from d13C and D14C of particulate organic matter in surface water from a shallow and semi-closed Lake Kiba2017

    • Author(s)
      Hong, T. B, Nagao, S., Ochiai, S., Fukushi, K., Goto, A., and Hasegawa, T.
    • Journal Title

      Journal of Nuclear and Radiochemical Sciences

      Volume: 17

    • Related Report
      2016 Research-status Report
    • Peer Reviewed
  • [Journal Article] 白亜系の国際対比:最近の動向2017

    • Author(s)
      長谷川卓
    • Journal Title

      化石

      Volume: 101 Pages: 75-80

    • NAID

      130007623291

    • Related Report
      2016 Research-status Report
    • Peer Reviewed
  • [Journal Article] A late Miocene methane-seep deposit bearing methane-trapping silica minerals at Joetsu, central Japan2016

    • Author(s)
      Miyajima, Y., Watanabe, Y., Yanagisawa, Y., Amano, K., Hasegawa, T. and Shimobayashi, N.
    • Journal Title

      Palaeogeography, Palaeoclimatology, Palaeoecology

      Volume: 455 Pages: 1-15

    • DOI

      10.1016/j.palaeo.2016.05.002

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 白亜紀セノマニアン/チューロニアン期境界の南太平洋高緯度域における環境変動2018

    • Author(s)
      加藤禎理, 長谷川卓, 後藤晶子, Crampton, J.
    • Organizer
      古生物学会2018年会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 南テチス海高緯度域における白亜紀セノマニアン/チューロニアン境界のOAE2:国際深海科学掘削計画(IODP)第369次航海の予察成果2018

    • Author(s)
      長谷川卓, 外山浩太郎, O’Connor, L.K.,Huber, B.T.,Hobbs, R.W., Bogus, K.A., IODP Exp. 369乗船研究者
    • Organizer
      古生物学会2018年会
    • Related Report
      2018 Annual Research Report
  • [Presentation] カナダ太平洋沿岸に分布する上部カンパニアン-マーストリヒチアン階に関する有機地球化学的特徴2018

    • Author(s)
      吉川亞理紗,長谷川卓,後藤晶子,岩瀬優也,守屋和佳, Haggart, J.
    • Organizer
      古生物学会2018年会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 南テチス海高緯度域における白亜紀セノマニアン/チューロニアン境界のOAE2:国際深海科学掘削計画(IODP)第369次航海の予察成果2018

    • Author(s)
      長谷川卓・外山浩太郎・L.K.O’Connor・R.W.Hobbs・ K.A. Bogu・IODP Exp. 369乗船研究者
    • Organizer
      日本古生物学会2018年会
    • Related Report
      2017 Research-status Report
  • [Presentation] ジュラ系/白亜系境界GSSPの設定に向けて:白亜系国際層序学委員会の動向と日本からの貢献2017

    • Author(s)
      長谷川卓
    • Organizer
      日本地質学会2017年会
    • Related Report
      2017 Research-status Report
  • [Presentation] Stratigraphic potential of radiolarians for determining the Jurassic/Cretaceous boundary: evidence from pelagic sequences in the Pacific and Tethys2017

    • Author(s)
      Matsuoka, A.
    • Organizer
      10th International Symposium on the Cretaceous, Vienna, Austria
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] チャートシーケンスの炭素同位体比層序構築を目指した超微量有機炭素の同位体比分析法の検討2016

    • Author(s)
      長谷川卓
    • Organizer
      日本地質学会 第123年学術大会
    • Place of Presentation
      東京都 日本大学
    • Year and Date
      2016-09-10
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] Syndepositional formation of calcareous nodules on muddy sea floor: elucidating depositional history by C, O, S isotope characterization2016

    • Author(s)
      Hasegawa, T. and Kobiyama, Y.
    • Organizer
      Goldschmidt Conference 2016
    • Place of Presentation
      Yokohama, Japan
    • Year and Date
      2016-06-27
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 微量有機炭素・低TOC試料の有機炭素同位体比分析法の検討2016

    • Author(s)
      長谷部桂一郎・後藤(桜井)晶子・長谷川卓
    • Organizer
      日本地球惑星科学連合2016年大会
    • Place of Presentation
      幕張メッセ 千葉
    • Year and Date
      2016-05-23
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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