F and Cl diffusion in phonolitic melts: Influence of the Na/K ratio

• Published in: Chemical geology Vol. 263; no. 1; pp. 89 - 98
• Main Authors: Balcone-Boissard, H., Baker, D.R., Villemant, B., Boudon, G.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.06.2009
• Subjects: Alkali ratio; Diffusion; Halogens; Magma degassing; Phonolite; MED, Italy; Germany; Phonolite; Alkali ratio; Magma degassing; Diffusion; Halogens

Fluorine and chlorine diffusion were measured in two natural phonolitic melts, from Vesuvius (Italy) and from Laacher See (Germany), at 0.5 and 1.0 GPa, between 1250 and 1450 °C at anhydrous conditions and with about 2 and 5 wt.% of dissolved water. The two different starting materials allow us to i...