Noble gas compositions of individual chondrules from the SaU 290 CH3 chondrite

DOI Web Site 41 References
  • NAKASHIMA Daisuke
    Laboratory for Earthquake Chemistry, Graduate School of Science, University of Tokyo (Present address) Wisc SIMS Laboratory, Department of Geoscience, University of Wisconsin-Madison
  • NAGAO Keisuke
    Laboratory for Earthquake Chemistry, Graduate School of Science, University of Tokyo

Bibliographic Information

Other Title
  • CH3コンドライトSaU 290のコンドリュールの希ガス同位体組成
  • CH3 コンドライト SaU290 ノ コンドリュール ノ キガス ドウイタイ ソセイ

Search this article

Abstract

More than 300 small chondrules (50-200 μm) were found in the Sayh al Uhaymir (SaU) 290 CH3 chondrite which is a solar wind noble gas bearing meteorite and shows a brecciated texture. We analyzed noble gases in the individual chondrules using a laser ablation noble gas extraction system which enables to reduce blank noble gases. Isotopic ratios of He and Ne show no clear evidence of solar wind exposure, suggesting that the chondrules have not been exposed to solar winds. A chondrule shows an excess of cosmogenic 3He relative to other chondrules, which is explained by cosmic-ray exposure on the parent body. The derived parent exposure age is longer than 2.0 Ma, while the space exposure age is estimated as 1.4 Ma.

Journal

  • Chikyukagaku

    Chikyukagaku 43 (4), 133-142, 2009

    The Geochemical Society of Japan

References(41)*help

See more

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top