Estimation of oxygen diffusivity from anion porosity in minerals.

• Zheng Yong-Fei

  Department of Earth and Space Sciences, University of Science and Technology of China

• Fu Bin

  Department of Earth and Space Sciences, University of Science and Technology of China

書誌事項

タイトル別名

• Estimation of oxygen diffusivity from a

抄録

An empirical model for predicting oxygen diffusivity from anion porosity is presented for a wide range of minerals. It is based on the examination of experimental diffusion data under anhydrous and hydrothermal conditions. The relationship between activation energies and pre-exponential factors in all minerals is assumed to obey a common compensation law regardless of diffusion medium (H₂O, OH^-, CO₂ or O₂). However, the H₂O molecules and OH^- groups are relatively small in volume and thus can migrate within mineral structures with given anion porosities easier than the CO₂ and O₂. As a result, the rates of oxygen diffusion in minerals under hydrothermal conditions are greater than those under anhydrous conditions. The Arrhenius parameters for oxygen diffusion in about 130 minerals have been estimated for the anhydrous and hydrothermal conditions, respectively. The empirical results on oxygen diffusivity are internally consistent for the minerals of geochemical interest and thus can be applicable to oxygen isotope geospeedometry during cooling of high-temperature mineral assemblages.

収録刊行物

• ＧＥＯＣＨＥＭＩＣＡＬ　ＪＯＵＲＮＡＬ

  ＧＥＯＣＨＥＭＩＣＡＬ　ＪＯＵＲＮＡＬ 32 (2), 71-89, 1998

  一般社団法人日本地球化学会

キーワード

• Geochemistry and Petrology
• Geophysics

詳細情報

• CRID: 1390001204550783616
• NII論文ID: 130003904594
• NII論文ID: 10008802550
• NII書誌ID: AA00654975
• DOI: 10.2343/geochemj.32.71
• ISSN: 18805973
• ISSN: 00167002
• NDL書誌ID: 4483663
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4483663
• 本文言語コード: en
• データソース種別:
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  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可