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1997 Fiscal Year Final Research Report Summary

DEVELOPMENT OF HIGH SENSITIVITY LASER ICP MASS SPECTROMETER FOR ZIRCON CHRONOLOGY

Research Project

Project/Area Number 08554017
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Petrology/Mineralogy/Science of ore deposit
Research InstitutionTOKYO INSTITUTE OF TECHNOLOGY

Principal Investigator

YURIMOTO Hisayoshi  Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Associate Professor -> 東京工業大学, 理学部, 助教授 (80191485)

Co-Investigator(Kenkyū-buntansha) MARUYAMA Shigenori  Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Profe, 理学部, 教授 (50111737)
MATSUMOTO Kazuya  Olympus Optical Co., Ltd., Development Group 1, Chief Manager, 応用研究部・電子デバイス室, 室長
HIRATA Takafumi  Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Assia, 理学部, 助手 (10251612)
Project Period (FY) 1996 – 1997
KeywordsZircon U-Pb Chronology / Laser Sampling / ICP Mass Spectrometry / Sensitive Ion Detection / 2 Dimensional Ion Detector
Research Abstract

We have been developing a new analytical method for precise U-Pb age determinations using an inductively coupled plasma mass spectrometry coupled with newly developed laser microprobe technique. In order to determine the precise U-Pb age data from 10 microns spot of the zircon samples, laser ablation sampling technique using 266nm UV laser beam was developed. Resultant sample volume for the analysis was decreased down to 1/50 level compared with conventional laser sampling technique using IR fundamental Nd-YAG laser, and therefore enhancement of elemental sensitivity of the mass spectrometer was inevitable for the U-Pb age determinations. In this study this was achieved by different three techniques ; (a) modification of ion extraction lens, (b) improving the vacuum for first ion extraction stage by applying the high capacity rotary pump, and (c) sensitive ion detection using 2 dimensional solid ion detector called AMI (Amplified MOS Imager). The basic isotopic data obtained here demonstrate clearly that U-Pb chronology using Laser-ICPMS has a potential to become a significant and cost-effective tool for use in U-Pb zircon chronology.

Research Products

(12 results)

All Other

All Publications

  • [Publications] Takafumi Hirata: "Lead Isotopic Analysis using Multiple Collector-Inductively Coupled Plasma Mass Spectrometry coupled with Modified External Correction Method for Mass Discrimination Effect" Analyst. 121. 1407-1411 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Barrat, J.A., Keller, F., Amosse J., Taylor, R.N., Nesbitt, R.W.and Hirata, T.: "Determination of rare earth elements in sixteen silicate reference samples by ICP-MS after Tm addition and ion-exchange separation" Geostandard Newsletter. 20. 133-139 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yurimoto H., Matsumoto, K.Kim.K, Kitajima, H., Kosaka, K.and Hrata, H.: "Development of solid-state two-dimensional ion imaging device and new computer control system for SIMS. in Secondary Ion Mass Spectrometry SIMS X" Wiley. 987-990 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ito, M., Yurimoto, H., Morioka, W.and Nagawsawa, H.: "REE diffusivities in melilite : A preliminary study by SIMS-depth profile method" Lunar Planet. Sci.28. 627-628 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yurimoto, H.and Kuramoto, K.: "Si fractionation of chondrite Parent bodies by bipolar outflow." Lunar Planet. Sci.28. 1615-1616 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Hirata and R.W.Nebitt: "Distribution of platinum group elements and rhenium between metallic phases of iron meteorites." Earth and Planetary Science Letters. Vol.,147. 11-24 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Takafumi Hirata: "Lead Isotopic Analysis using Multiple Collector-Inductively Coupled Plasma Mass Spectrometry coupled with Midified External Correction Method for Mass Discrimination Effect." Analyst. 121. 1407-1411 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Barrat, J.A., Keller, F., Amosse J., Taylor, R.N., Nesbitt, R.W.and Hirata, T.: "Determination of rare earth elements in sixteen silicate reference samples by ICP-MS after Tm addition and ion-exchange separation" Geostandards Newsletter. 20. 133-139 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yurimoto, H., Matsumoto, K., Kim, K,Kitajima, H., Kosaka, K.and Hirata, H.: "Development of solid-state two-dimensional ion imaging device and new computer control system for SIMS.in Secondary Ion Mass Spectrometry SIMS X" Wiley. 987-990 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ito, M., Yurimoto, H., Morioka, M.and Nagasawa, H.: "REE diffusivities in melilite : A preliminary study by SIMS-depth profile method" Lunar Planet.Sci.28. 627-628 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yurimoto, H.and Kuramoto, K.: "Si fractionation of chondrite parent bodies by bipolar outflow." Lunar Planet.Sci.28. 1615-1616 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hirata, T.and R.w.Nesbitt: "Distribution of platinum grou pelements and rhenium between metallic phases of iron meteorites." Earth and planetary Science Letters. 147. 11-24 (1997)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-15  

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