岩石学・地球化学・年代学のリンク　　鉱物粒界の直視　　高分解能電子顕微鏡観察

• 平賀 岳彦

  東北大学大学院理学研究科地学専攻地球物質科学

書誌事項

タイトル別名

• Links of Petrology, Geochemistry and Geochronology. Observation of Grain Boundaries in Rocks by High-Resolution Transmission Electron Microscopy.
• コウブツ リュウカイ ノ チョクシ コウ ブンカイノウ デンシ ケンビキョウ カンサツ
• 高分解能電子顕微鏡観察

抄録

Grain boundaries in metamorphic rocks were obsereved by high-resolution transmission electron microscopy. Most of the boundaries have no distinct secondary phases at a nanometer scale. Not only between the same kind of minerals but also between different minerals, mineral grains are directly connected at their boundaries, showing that the structual width of the grain boundaries is less than 0.5nm. Grain boundaries with spheroidal voids are observed in the boundaries. It can be concluded that this type of grain boundary is formed by the healing of microcracks. Low-index plane boundaries are well-developed, showing that this type of boundary has low grain boundary energy. Local structural modification, indicating the segregation of impurities, in grain boundaries is observed. The present results show that the actual width of the grain boundary in rocks is too small for the grain boundary diffusion to be as the dominant transport mechanism.

収録刊行物

• 地学雑誌

  地学雑誌 108 (2), 110-121, 1999

  公益社団法人 東京地学協会

キーワード

• 岩石
• 鉱物
• 粒界
• 高分解能電子顕微鏡法

詳細情報

• CRID: 1390282679206536064
• NII論文ID: 10002238876
• NII書誌ID: AN00322536
• DOI: 10.5026/jgeography.108.2_110
• ISSN: 18840884
• ISSN: 0022135X
• ISSN: http://id.crossref.org/issn/0022135X
• NDL書誌ID: 4780767
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4780767
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可