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Developmental of high precision incremental heating device for Ar-Ar single mineral dating

Research Project

Project/Area Number 06554022
Research Category

Grant-in-Aid for Developmental Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Petrology/Mineralogy/Science of ore deposit
Research InstitutionOkayama University of Science

Principal Investigator

ITAYA Tetsumaru  Okayama University of Science, Research Institute of Natural Sciences, Professor, 自然科学研究所, 教授 (60148682)

Co-Investigator(Kenkyū-buntansha) HYODO Hironobu  Okayama University of Science, Research Institute of Natural Sciences, Lecturer, 自然科学研究所, 講師 (50218749)
Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥10,000,000 (Direct Cost: ¥10,000,000)
Fiscal Year 1995: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1994: ¥8,500,000 (Direct Cost: ¥8,500,000)
KeywordsSingle mineral crystal / Ar-Ar dating / Laser probe / High sensitive mass spectrometer / Stepwise heating / Infrared thermometer / Temperature control / Computer control / 高感度質量分析
Research Abstract

It is most important to analyze argon isotopes in gas phase fractions extracted from a single mineral by incremental heating for highly reliable Ar-Ar dating. This study is to develop a high precision incremental heating device with the temperature control system by using a laser probe heating apparatus and an infrared thermometer and to apply it to Ar-Ar single mineral dating. We have bought the main apparatuse of an infrared thermometer and then carried out the basic experiments using it and the former laser probe heating apparatuse. The new device to be developed makes it possible to measure the high temperature range using only the detector for medium temperature of infrared thermometer though the commercial base infrared thermometer has required the high temperature detector to measure the temperatures. This case follows our original idea to use a specific filter in measuring the high temperatures. In the calibration for energy loss of infrared rays coming through the filfter, we … More did not choose to re-write the program installed in the converter and does in stead to make a calibration curve between the true temperature and the out put voltage. This makes it possible to measure precisely and easily the sample temperatures controlled by laser incremental heating. This technique has been applied to Ar-Ar mineral dating of natural samples and some results have been presented at conferences.
In proceeding this project, there is a by-product ; we had to modify slightly the content of this project. This lead us to recognize a economical but precise quadruple mass spectrometer for qualitative and quantitative analyzes of gas species extracted from specimens in meddium temperature range. This mass spectrometer makes it possible to measure immediately mass spector of gas species of which the intensity change quickly in time and to estimate the absolute abundance of each gas species at the time zero when the gas was introduced into the mass spectrometer. In highly reliable Ar-Ar dating, it is neccessary to take the age spectrum for many incremental heating gas fractions, requiring decreasing of analysing time of each fraction. This new mass spectrometer makes it possible to evaluate the gas purification time before introducing the gas into mass spectrometer. Less

Report

(2 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] 板谷徹丸: "第四紀研究におけるK-Ar法の過去・現在・未来" 第四紀研究. 34. 249-259 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 兵藤博信: "レーザー加熱法における微小鉱物の温度測定とその精度" 岡山理大自然科学研報. No.21. 3-8 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Arribas,A. Jr.,: "Contemporaneous formation of adjacent porphyry and epithermal Cu-Au deposits over 300ka in northern Luzon,Philippines." Geology. 23. 337-340 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 兵藤博信: "レーザー段階加熱による単結晶鉱物^<40>Ar/^<39>Ar年代測定" 岡山理大自然科学研報. No.20. 63-68 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 岡田利典: "明礬石年代測定のためのガラス製ガス抽出精製装置" 岡山理大自然科学研報. No.20. 59-62 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Itaya, T.and Okada, T.: "Past, present and future of the K-Ar method for Quaternary Research" The Quaternary Research. 34 (3). 249-259 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Hyodo, H., Itaya, T.and Matsuda, T.: "Temperature meassurement and its precision of small minerals using laser heating." Bull.Research Inst.Natural Sci.21. 3-8 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Arribas, A.Jr., Hedenquist, J.W., Itaya, T., Okada, T., Concepcion, R.A.and Garcia, J.S.Jr.: "Contemporaneous formation of adjacent porphyry and epithermal Cu-Au deposits over 300ka in northern Luzon, Philippines." Geology. 23 (4). 337-340 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Hyodo, H., Matsuda, T., Fukui, S.and Itaya, T.: "^<40>Ar/^<39>Ar age determination of a single mineral grain by laser step heating" Bull.Research Inst, Natural Sci.20. 63-67 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Okada, T.and Itaya, T.: "Gas extraction and purification system made of glass for alunite K-Ar age determination." Bull.Research Inst. Natural Sci.20. 59-61 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 板谷徹丸: "第四紀研究におけるK-Ar法の過去・現在・未来" 第四紀研究. 34. 249-259 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 兵藤博信: "レーザー加熱法における微小鉱物の温度測定とその精度" 岡山理大自然科学研報. No21. 3-8 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Arribas, A. Jr.: "Contemporaneous formation of adjacent porphyry and epithermal Cu-Au deposits over 300ka in northern Luzon, Philippines." Geology. 23. (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Arribas, A. Jr.: "Contemporaneous formation of adjacent porphyry and epithermal Cu-Au deposits over 300ka in northern Luzon, Philippines." Geology. 23. (1995)337-340

    • Related Report
      1995 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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