宇宙塵の同位体研究 –希ガス同位体–  [in Japanese] Isotope studies on interplanetary dust particles (IDPs) –Noble gases–  [in Japanese]

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Author(s)

    • 長尾 敬介 NAGAO Keisuke
    • 東京大学大学院理学系研究科地殻化学実験施設 Laboratory for Earthquake Chemistry, Graduate School of Science, University of Tokyo

Abstract

Only a few laboratories have reported noble gas data for a single particle of interplanetary dust particles (IDPs) because of difficulties in analyzing extremely small particle sizes, 〜10μm and〜10ng, for which a noble gas detection system with low analytical blank level and high sensitivity is required. Noble gas studies performed on IDPs until now have been aimed at identifying their extraterrestrial origin and at estimating heating temperature experienced during their entry into the terrestrial atmosphere. Isotopic compositions of light noble gases He, Ne and Ar indicate solartype noble gas component, and strongly support their extraterrestrial origin. Step-heating experiments show variable release patterns for He and Ne depending on the thermal history of particles, which may help in identifying the origins, asteroidal or cometary, of individual particles. Noble gases of extraterrestrial origin observed in deep-sea sediments are also described.

Journal

  • Chikyukagaku

    Chikyukagaku 32(4), 193-201, 1998

    The Geochemical Society of Japan

References:  38

Codes

  • NII Article ID (NAID)
    110008679961
  • NII NACSIS-CAT ID (NCID)
    AN00141280
  • Text Lang
    JPN
  • Article Type
    REV
  • ISSN
    0386-4073
  • NDL Article ID
    4628324
  • NDL Source Classification
    ZM41(科学技術--地球科学)
  • NDL Call No.
    Z15-645
  • Data Source
    CJP  NDL  NII-ELS  J-STAGE 
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