Physics – Geophysics
Scientific paper
Jan 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28..347b&link_type=abstract
Geophysical Research Letters, Volume 28, Issue 2, p. 347-350
Physics
Geophysics
25
Mathematical Geophysics: Modeling, Mathematical Geophysics: Fractals And Multifractals, Physical Properties Of Rocks: Microstructure, Volcanology: Eruption Mechanisms
Scientific paper
Both power law and exponential vesicle size distributions (VSDs) have been observed in many different types of volcanic rocks. We present results of computer simulations and laboratory analogue experiments which reproduce these findings and show that the distributions can be interpreted as the product of continuous bubble nucleation resulting from non-equilibrium degassing. This ongoing nucleation causes the bubbles to evolve through an exponential size distribution into a power law size distribution as nucleation and growth progress. These findings may explain the apparent contradiction between present models of bubble growth in magmas, which predict that degassing in explosive eruptions is a non-equilibrium process, and models of conduit flow, which assume perfect equilibrium degassing. The process of continuous nucleation is the mechanism whereby the volcanic system maintains near-equilibrium in the case of rapid depressurization and slow volatile diffusion.
Blower J. D.
Keating Jon P.
Mader Heidy M.
Phillips Charles J.
No associations
LandOfFree
Inferring volcanic degassing processes from vesicle size distributions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Inferring volcanic degassing processes from vesicle size distributions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Inferring volcanic degassing processes from vesicle size distributions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-924604