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

Figure 6

The impact of TT on strength. (a) UCS curves at 10^-5 s^-1 strain rate. (b) TXL curves at 10^-5 s^-1 strain rate. (c) UTS curves, using the Brazilian disc method, at 10^-4 s^-1 diametric equivalent strain rate. For increased TT, all strength test types display a weakening trend and an increased accommodation of strain prior to failure (additional tensile strength curves are shown in Supplementary Figure 8).

(a)

(b)

(c)