1998/01/01 by Yong-Fei Zheng, Yong‐Fei Zheng, Bin Fu · 1 citation
Chemistry · Engineering · Environmental Science · #CO2 Sequestration and Geologic Interactions #Hydrocarbon exploration and reservoir analysis #Radioactive element chemistry and processing
paper · pdf · doi:10.2343/geochemj.32.71
crossref issued 1998/01/01 · crossref published 1998/01/01 · crossref published-print 1998/01/01 · openalex publication_date 1998/01/01 · crossref created 2011/10/11 · crossref deposited 2021/05/20 · openalex created_date 2025/10/10 · crossref indexed 2026/07/31 · openalex updated_date 2026/07/31
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.