Ar Isotope Analysis for K-Ar Dating Using Two Modified-VG5400 Mass Spectrometers-I : Isotope Dilution Method
スポンサーリンク
概要
- 論文の詳細を見る
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 operators skillfulness.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.
- 日本質量分析学会の論文
- 1996-02-20
著者
-
Nagao Keisuke
Institute for Study of Earth's Interior, Okayama University
-
OGATA Atsumi
Institute for Study of the Earth's Interior, Okayama University
-
Ogata Atsumi
Institute For Study Of The Earth's Interior Okayama University
-
Miura Yayoi
Institute for Study of the Earth's Interior, Okayama University
-
Miura Yayoi
Institute For Study Of The Earth's Interior Okayama University
-
YAMAGUCHI Kenji
Institute for Study of the Earth's Interior, Okayama University
-
Yamaguchi Kenji
Institute For Study Of The Earth's Interior Okayama University
-
Nagao Keisuke
Institute For Study Of Earth's Interior Okayama University
関連論文
- 40Ar-39Ar analyses of a lumar meteorite (Yamato-86032) and a few LL3 and LL4 chondrites from Antarctica
- K-Ar AGES OF IGNEOUS AND METAMORPHIC ROCKS FROM MCMURDO, S∅R RONDANE AND DUMONT D'URVILLE, ANTARCTICA
- K-Ar ages of the basaltic rocks from Far East Russia : Constraints on the tectono-magmatism associated with the Japan Sea opening
- Application of Laser to Spot Analysis of Noble Gases in Primitive Meteorite
- Noble gases in pillow basalt glasses from the northern Mariana Trough back-arc basin
- SUBVOLCANIC ZONED GRANITIC PLUTON IN THE BARTON AND WEAVER PENINSULAS, KING GEORGE ISLAND, ANTARCTICA
- K-Ar Ages and Paleosecular Variation of Direction and Intensity from Quaternary Lava Sequences in the Ruapehu Volcano, New Zealand
- Trace element and isotopic characteristics of inclusions in the Yamato ordinary chondrites Y-75097, Y-793241 and Y-794046
- Noble gases and mineralogy of primary igneous materials of the Yamato-793605 shergottite
- Noble Gases in Tellurium and Associated Minerals and Double-Beta Decay of ^Te
- Where are noble gases trapped in Yamato-74063 (unique) ?
- Noble gases in the unique meteorites Yamato-74063 and -74357
- Ar Isotope Analysis for K-Ar Dating Using Two Modified-VG5400 Mass Spectrometers-I : Isotope Dilution Method
- Noble gases and 81Kr-terrestrial age of Asuka-881757 lunar meteorite
- Rb-Sr and K-Ar age determinations of the granitic rocks in the southern part of the Kyeongsang basin, Korea: Implication for cooling history and evolution of granitic magmatism during late Cretaceous
- Noble Gases in Japanese Chondrites: Their Gas Retention and Cosmic-Ray Exposure Histories
- Noble gases and 81Kr-Kr exposure ages of non-Antarctic ordinarychondrites: An attempt to measure terrestrial ages of Antarctic meteorites
- Oxygen isotope study of Tsukuba chondrite, some HED meteorites and Allende chondrules
- Noble gases, chemical composition, and cosmic-ray exposure age of the Yamato-74357 lodranite
- Noble gases in hosts and inclusions from Yamato-75097 (L6), -793241 (L6) and-794046 (H5)
- 40Ar-39Ar analyses of Juvinas fragments
- A Preliminary Study on the Chemical and Isotopic Characteristics of Geothermal Waters and Gases in Northern Thailand (軽元素同位体比測定)