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Figure 12 | Geothermal Energy

Figure 12

From: Physical property relationships of the Rotokawa Andesite, a significant geothermal reservoir rock in the Taupo Volcanic Zone, New Zealand

Figure 12

Results of geometric modeling for Rotokawa Andesite. (A) Initial damage parameter D0 as predicted by Equation 10 and described by Baud et al. ([2014]) plotted versus calculated crack densities by the method of (Underwood [1970]). (B) Prediction of compressional wave velocity (Vp) as a function of the initial damage parameter D0 the relationship between D0 and Vp shows a moderate correlation with high initial damage parameter but becomes quite clouded in those samples with a very small calculated D0 (see text for further expansion on this relationship).

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