Enhancement of Permeability Activated by Supercritical Fluid Flow through Granite

Figure 2

Photographs of rock core samples showing hydrothermal breccia veins in (a) borehole DH-11 and (b) borehole MIZ-1, as well as (c, d) glassy veins in borehole DH-13.

(a)

(b)

(c)

(d)