Self-Diffusion of Silicon and Oxygen in Silicate Melts: An Experimental Study

  • N. Shimizu
  • I. Kushiro
Conference paper
Part of the Springer Series in Chemical Physics book series (CHEMICAL, volume 36)


The rate of diffusive transport of Si and O in silicate melts is important not only in understanding kinetics of magmatic processes but also in studying the structure of silicate melts. The coefficients of self-diffusion of Si and O were determined experimentally in two simple silicate melts of geologic interest: jadeite composition; NaAlSi2O6, and diopside composition, CaMgSi2 O. These melts were selected because they represent: (1) contrasting degrees of polymerization, i.e., jadeite melt is highly polymerized, whereas diopside melt is de-polymerized [1], (2) extremes in the spectrum of viscosities, i.e., jadeite melt at the high viscosity end and diopside melt at the low viscosity end [2], and (3) contrasting behavior in terms of their pressure-induced variations in viscosities, i.e., jadeite melt shows a decrease of viscosity with increasing pressure [3], whereas diopside melt shows an increase of viscosity with increasing pressure [2].


Quartz Silicate Fractionation Diopside 


  1. [1].
    S.K. Sharma, D. Virgo and B.O. Mysen: Carnegie Inst. Wash. Yb, 77, 658 (1978).Google Scholar
  2. [2].
    CM. Scarfe, B.O. Mysen and D. Virgo: Carnegie Inst. Wash. Yb, 78, 547 (1979).Google Scholar
  3. [3].
    I. Kushiro: Jour. Geophys. Res., 81, 6347 (1976).CrossRefGoogle Scholar
  4. [4].
    N. Shimizu and S.R. Hart: Journ. Appl. Phys., 53, 1303, (1982)CrossRefGoogle Scholar
  5. [5].
    C.A. Angell, P.A. Cheeseman and S. Tamaddon: Science, 218, 885 (1982).CrossRefGoogle Scholar
  6. [6].
    N. Shimizu and I. Kushiro: Geochim. Cosmochim. Acta, (submitted) (1983).Google Scholar
  7. [7].
    S.D. Hamann: Aust. Jour. Chem., 18, 1 (1965).CrossRefGoogle Scholar
  8. [8].
    E.B. Watson: Contrib. Mineral. Petrol., 80, 73 (1982).CrossRefGoogle Scholar
  9. [9].
    S.B. Brummer and G.J. Hills: Trans. Faraday Soc, 57, 1823 (1961).CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1984

Authors and Affiliations

  • N. Shimizu
    • 1
  • I. Kushiro
    • 2
  1. 1.Department of Earth, Atmospheric and Planetary SciencesMassachusetts Institute of TechnologyCambridgeUSA
  2. 2.Geological InstituteUniversity of TokyoTokyoJapan

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