Enhancement of Permeability Activated by Supercritical Fluid Flow through Granite

Figure 9

SEM image and photomicrographs of microfractures in the granite. (a) SEM image of developed open microfractures without filling minerals of the borehole DH-13 553.8. (b) Photomicrograph (thin section, open nicol) and (c) traced lines of these open microfractures. (d) Photomicrographs of fewer microfractures and second growth of the relict biotite of the borehole DH-11 537.2 (thin section, cross nicol).

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