Tectonic Evolution of the Southern Negros Geothermal Field and Implications for the Development of Fractured Geothermal Systems

Figure 3

Group 1 fractures at the macroscale. (a) Close-up photo of the E-W to WNW-ESE sinistral faults showing the cataclastic core mapped along Okoy River (refer to Figure 1(c), i for the location). (b) Slickenlines preserved on the sinistral fault. (c) Pyrite-filled veins (located at Figure 1(c), i and ii). (d) Fault planes (red) and tensile fractures (blue) represented in an equal-area lower-hemisphere stereonet.

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