Cation diffusion in aluminosilicate garnets: experimental determination in pyrope-almandine diffusion couples

Cation diffusion in aluminosilicate garnets: experimental determination in pyrope-almandine diffusion couples

Diffusion couples made from homogeneous gem quality natural pyrope and almandine garnets were annealed within graphite capsules under anhydrous conditions at 22-40 kbar, 1057-1400 degC in a piston-cylinder apparatus. The concentration profiles that developed in each couple were modeled to retrieve t...

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Veröffentlicht in:Contributions to mineralogy and petrology 1998-04, Vol.131 (2-3), p.171-180
Hauptverfasser: Ganguly, Jibamitra, Cheng, Weiji, Chakraborty, Sumit
Format: Artikel
Sprache:eng
Schlagworte:
Cations
Diffusion coefficient
Geology
Mineralogy
Petrology
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Zusammenfassung:Diffusion couples made from homogeneous gem quality natural pyrope and almandine garnets were annealed within graphite capsules under anhydrous conditions at 22-40 kbar, 1057-1400 degC in a piston-cylinder apparatus. The concentration profiles that developed in each couple were modeled to retrieve the self diffusion coefficients AD(I)B of the divalent cations Fe, Mg, Mn and Ca.
ISSN:0010-7999
1432-0967
DOI:10.1007/s004100050386