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Geothermal Energy

Science – Society – Technology

Fig. 2 | Geothermal Energy

Fig. 2

From: Structural control of the graben fault on hydrothermal alteration in the Cerro Pabellón geothermal system (Andean Cordillera, Northern Chile)

Fig. 2

Lithology, mud losses, measured injectivity index, permeable fracture and fault zones (FZ), temperature profile, and vertical distribution of hydrothermal minerals in CP5A well. Temperature profile was measured one year after drilling operations. The thickness and depth of the FZs are deduced from clay signature and thus are constrained by the sampling. Relative proportions of hydrothermal minerals are interpreted from EG-saturated XRD patterns (< 5 μm clay fraction). Di-clays proportion is the percentage of dioctahedral clay minerals (essentially illite and I-S) in the clay material. I-S R1 are expressed in percentage of smectite comprised between 60 and 90%. C-Crr chlorite/corrensite mixed layers, Crr corrensite, Chl chlorite, Ill illite, I-S illite–smectite mixed layers, Sm smectite, Zeo zeolites. Depth is expressed as Measured Depth

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