物質科学としての宇宙塵研究  [in Japanese] Research of cosmic dust as material science  [in Japanese]

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Author(s)

    • 田澤 雄二 TAZAWA Yuji
    • 京都大学大学院理学研究科物理学第二教室 Department of Physics, Graduate School of Science, Kyoto University
    • 福岡 孝昭 FUKUOKA Takaaki
    • 立正大学地球環境科学部環境システム学科 Department of Environmental Systems, Faculty of Geo-Environmental Science, Rissho University

Abstract

Extraterrestrial microparticles have been collected and investigated for more than a century. Recent developments of analytical techniques and mass collecting methods have brought us three types of collections and new knowledge of cosmic dust; (1) the smallest size group (smaller than 100μm) from the Stratosphere mainly consisting of the most primitive and fragile particles, most of which are unmelted porous aggregates of fine grains thought to be typical of interplanetary dust particles (IDPs) or cometary debris just falling onto the earth, (2) the largest size group (several 10 μm to several mm) from deep sea sediments, the best known cosmic dust collection as "cosmic spherules", all of which melted during atmospheric entry and were heavily weathered during their terrestrial ages, and (3) the medium size group (several μm to several 100μm) from the Polar ice/ snow mainly consisting of partially melted and unmelted particles distinct from conventional chon- dritic materials. Although quantity of a single particle is too small, compiled information obtained by the various new methods will give us a new horizon of material science of the extraterrestrial matter.

Journal

  • Chikyukagaku

    Chikyukagaku 32(4), 149-159, 1998

    The Geochemical Society of Japan

References:  68

Cited by:  1

Codes

  • NII Article ID (NAID)
    110008679957
  • NII NACSIS-CAT ID (NCID)
    AN00141280
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0386-4073
  • NDL Article ID
    4628320
  • NDL Source Classification
    ZM41(科学技術--地球科学)
  • NDL Call No.
    Z15-645
  • Data Source
    CJP  CJPref  NDL  NII-ELS  J-STAGE 
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