Enhancement of Permeability Activated by Supercritical Fluid Flow through Granite

Figure 8

Homogenization temperatures of fluid inclusions and summary of P–T conditions. (a) Histogram of (homogenization) of fluid inclusions in glassy veins. (b) b1: summary of temperature constraints for glassy veins. b2: P–T plot showing the conditions for the formation of the host granite, glassy veins, and fluid inclusions. The grey area indicates P–T conditions of the host granite determined using the amphibole-plagioclase thermometer and Al-in-hornblende barometer. The area in red and orange indicates P–T conditions for the glassy-vein formation constrained by amphibole-plagioclase, Ti-in-biotite, and Ti-in-quartz thermometers.

(a)

(b)