Advertisement

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)

Abstract

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].

Keywords

Carnegie Inst Diffusion Unit Geologic Interest Simple Silicate Negative Volume Change 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  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

Personalised recommendations