Permeability-porosity relationship in vesicular basalts

Details Permeability-porosity relationship in vesicular basalts Permeability-porosity relationship in vesicular basalts

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26..111s&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 1, p. 111-114

Physics

51

Hydrology: Groundwater Transport, Physical Properties Of Rocks: Permeability And Porosity, Physical Properties Of Rocks: Transport Properties, Volcanology: Lava Rheology And Morphology

Scientific paper

The permeability k and porosity ϕ of vesicular basalts are measured. The relationship between k and ϕ reflects the formation and emplacement of the basalts and can be related to the crystal and vesicle microstructure obtained by image analysis. Standard theoretical models relating k and ϕ that work well for granular materials are unsuccessful for vesicular rocks due to the fundamental difference in pore structure. Specifically, k in vesicular rocks is governed by apertures between bubbles. The difference between calculated and measured k reflects the small size of these apertures with aperture radii typically O(10) times smaller than the mean bubble radii.

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