Invasion of ice through rigid anisotropic porous media

Crystallographic textures are presented of ice formed in situ by directional cooling of saturated porous rocks. The observations of texture demonstrate that pore invasion, and not repeated nucleation, dominates the freezing process in these rocks. This implies that microscopic advance of crystallogr...

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Bibliographic Details
Published in:Journal of Geophysical Research. B. Solid Earth 2004-12, Vol.109 (B12), p.B12205.1-n/a
Main Authors: Swainson, I. P., Schulson, E. M.
Format: Article
Language:English
Subjects:
anisotropic permeability
Earth sciences
Earth, ocean, space
Exact sciences and technology
ice
invasion percolation
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Summary:Crystallographic textures are presented of ice formed in situ by directional cooling of saturated porous rocks. The observations of texture demonstrate that pore invasion, and not repeated nucleation, dominates the freezing process in these rocks. This implies that microscopic advance of crystallographically coherent ice occurs through the pore network. The textures are governed by the permeability of the pore network and not by the direction of bulk heat flow. The anisotropy of permeability provides a mechanism for grain competition during ice growth, as crystals with fast growth directions aligned favorably to the maximum permeability are favored.
ISSN:0148-0227
2156-2202
DOI:10.1029/2004JB003134