The effect of hydrogen on oxygen diffusion in quartz; evidence for fast proton transients?
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|Authors:||Elphick, S. C.; Graham, C. M.|
|Author Affiliations:||Primary: |
Univ. Edinburgh, Dep. Geol., Edinburgh, United Kingdom
|Volume Title:||Nature (London)|
|Source:||Nature (London), 335(6187), p.243-245. Publisher: Macmillan Journals, London, United Kingdom. ISSN: 0028-0836|
|Note:||In English. 29 refs.; illus. incl. 1 table|
|Summary:||Experiments on the diffusion of oxygen in quartz at high P" (1 kbar) and T (to 850 degrees C), are described and the results are compared with those using dry O2 gas. The results indicate that the activity of H+ ions rather than or if H2, is the main variable in mineralogical changes affected by H2O. Geological fluids should, therefore, be examined for their ability to supply or maintain H+ on a mineral lattice during solid-state changes. Any process affecting H+ concentration in a fluid (e.g. salt solution, P/T changes) may be highly significant. The rapid change in O diffusion rates in quartz reported, are explained by fast protons transient through the silicate lattice. [R.K.H.]|
|Subjects:||Diffusion; Experimental studies; Framework silicates; Gases; Geochemistry; Geophysics; High pressure; High temperature; Hydrogen; Minerals; Oxygen; P-T conditions; Physicochemical properties; Pressure; Processes; Protons; Quartz; Silica minerals; Silicates; Temperature; Transient phenomena; Water|
|Copyright Information:||GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom|
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