Highly-silicic glass inclusions in eucrites and diogenites

• Kitazato Kouhei

  Department of Earth and Planetary Science, University of Tokyo

• Kurosawa Masanori

  Institute of Geoscience, University of Tsukuba

抄録

Textural and chemical descriptions are reported for glass inclusions from the Dhofar 007 cumulate eucrite and the Johnstown and Tatahouine diogenites. Although previous studies described inclusions of tridymite or cristobalite, the glass inclusions found in the present samples are distributed in planar arrays transecting mineral grains, indicating a secondary origin. These glass inclusions often contain precipitated daughter minerals, such as negative crystals of chromite and troilite. Assuming each of these inclusions originally was a single phase having a homogeneous composition, EPMA and LAM-ICP-MS data suggest that the parent melts were highly silicic and sulphur-rich, and had low abundances of incompatible elements. These glass inclusions in cumulate eucrites and diogenites may be derived from silica-rich melts generated from the incongruent melting of orthopyroxene.

収録刊行物

• Antarctic meteorite research

  Antarctic meteorite research 17 200-208, 2004-09

  国立極地研究所

キーワード

• glass inclusion, eucrite, diogenite, incongruent melting

詳細情報

• CRID: 1574231876590329344
• NII論文ID: 110001052382
• NII書誌ID: AA11182426
• ISSN: 13434284
• 本文言語コード: en
• データソース種別:
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