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Geothermal Energy

Science – Society – Technology

Fig. 7 | Geothermal Energy

Fig. 7

From: The impact of hydrothermal alteration on the physiochemical characteristics of reservoir rocks: the case of the Los Humeros geothermal field (Mexico)

Fig. 7

a Total alkali versus silica (TAS) diagram (Le Maitre et al. 2002) of the pre-caldera andesite outcrop samples. Selected major-element Harker diagrams of the outcrop and reservoir samples in (b–i). The pre-caldera reservoir samples were classified regarding their degree of hydrothermal alteration observed during petrographic analyses (weak, moderate, and strong)

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