PRESSURE EFFECT ON K DIFFUSION IN HYDRATED GRANITIC MELT

Authors
BAI TB VANGROOS AFK
Citation
Tb. Bai et Afk. Vangroos, PRESSURE EFFECT ON K DIFFUSION IN HYDRATED GRANITIC MELT, Science in China. Series B, Chemistry, life sciences & earth sciences, 37(7), 1994, pp. 879-886
Citations number
26
Categorie Soggetti
Multidisciplinary Sciences
Journal title
Science in China. Series B, Chemistry, life sciences & earth sciences → ACNP
ISSN journal
1001652X
Volume
37
Issue
7
Year of publication
1994
Pages
879 - 886
Database
ISI
SICI code
1001-652X(1994)37:7<879:PEOKDI>2.0.ZU;2-4
Abstract
The chemical diffusivity of K in a hydrated granitic melt was determin ed at temperatures of 750 - 900-degrees-C and pressures between 1 and 5.6 kbar. K diffusion follows the Arrhenius equation, its activation e nergy is about 20 kcal/mole and the activation volume is about 20 cm3/ mole under the conditions investigated. The diffusivity of K was found to be very sensitive to pressure. The results of this study could be used to evaluate K diffusion in various geological situations.