TY  - JOUR
A1  - Vasseur, Jérémie
A1  - Wadsworth, Fabian B.
T1  - The Permeability of Columnar Jointed Lava
Y1  - 2019
VL  - 124
IS  - 11
SP  - 11305
EP  - 11315
JF  - Journal of Geophysical Research: Solid Earth
DO  - 10.1029/2019JB018118
DO  - 10.23689/fidgeo-5030
N2  - Columnar jointed lava is an important facies in many geothermal reservoir systems. The permeability of jointed lavas is dominated by the contribution from fracture networks. We use a scaling for the permeability of a set of fractures in a solid or porous mass and extend this to arrays of hexagonal intercolumn fractures. To validate our analytical results, we create numerical domains with relevant geometries and extract system-scale permeability using the LBflow lattice-Boltzmann fluid flow simulation tool. Finally, we model the cooling contraction of columns to extend our results so that they predict the permeability with time after lava emplacement. Importantly, we use these results to estimate the range of permeabilities typical of columnar joints that form during cooling from high temperature and are preserved in the crust at moderate to low temperatures.
UR  - http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9376
ER  -