Ar Isotope Analysis for K-Ar Dating Using Two Modified-VG5400 Mass Spectrometers-1-Isotope Dilution Method

• NAGAO Keisuke

  Institute for Study of the Earth's Interior, Okayama University

• OGATA Atsumi

  Institute for Study of the Earth's Interior, Okayama University

• MIURA Yayoi N.

  Institute for Study of the Earth's Interior, Okayama University

• YAMAGUCHI Kenji

  Institute for Study of the Earth's Interior, Okayama University

書誌事項

タイトル別名

• Ar Isotope Analysis for K-Ar Dating Using Two Modified-VG5400 Mass Spectrometers-I: Isotope Dilution Method.
• Ar Isotope Analysis for K Ar Dating Usi
• Ar isotope analysis for K–Ar dating using two modified-VG5400 mass spectropmeters-I: isotope dilution method
• Ar isotope analysis for K–Ar dating using two modified-VG5400 mass spectrometers—I: isotope dilution method

抄録

Two noble gas mass spectrometry systems (MS-I and MS-II) have been installed in 1989, one of which was designed in our laboratory for Ar isotope analysis to measure K-Ar age by isotope dilution method using ³⁸Ar-spike. The whole system was modified and improved to obtain high quality Ar data. The improved system composed of an Ar extraction and purification line and a Modified-VG5400 mass spectrometer enables us to determine precise Ar isotope composition easily and speedily irrespective to operator's skillfulness.<br>Formulas calculating radiogenic ⁴⁰Ar abundance, which takes account of correction for Ar isotopes of both spike and blank, are presented. For samples with young K-Ar age, formulas to estimate the radiogenic ⁴⁰Ar abundance based on ⁴⁰Ar/³⁶Ar ratio are also proposed. Replicate analyses on many K-Ar standard samples show that the system can be applicable to samples with ages ranging 0.01 to 1500 Ma without any systematic analytical errors.

収録刊行物

• 質量分析

  質量分析 44 (1), 39-61, 1996

  一般社団法人 日本質量分析学会

キーワード

• At isotope analysis
• K-Ar determination method
• Isotope dilution method

詳細情報

• CRID: 1390001206494752640
• NII論文ID: 10016279313
• NII書誌ID: AN0010555X
• ISSN: 05428645
• ISSN: 18804225
• ISSN: 18843271
• ISSN: 13408097
• ISSN: http://id.crossref.org/issn/13408097
• DOI: 10.5702/massspec.44.39
• COI: 1:CAS:528:DyaK28XitFegs7Y%3D
• NDL書誌ID: 3926627
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3926627
• Web Site: http://www.jstage.jst.go.jp/article/massspec/44/1/44_1_39/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可