Thermal Liability of Hyaloclastite in the Krafla Geothermal Reservoir, Iceland: The Impact of Phyllosilicates on Permeability and Rock Strength

Figure 4

Influence of TT on mass, porosity, and permeability. (a) Percentage mass change induced by thermal treatment for each 26 mm by 52 mm core, showing increasing mass reduction up to temperatures of 600°C. (b) Increasing porosity-gas permeability of the as-collected and post-treatment samples as the treatment temperature is increased. (c) Normalised porosity and gas permeability change from the as-collected materials, showing a linear permeability change with increased normalised porosity change.

(a)

(b)

(c)