Chlorite geothermometer: II Application to the hydrothermal alteration around Toyoha epithermal vein type ore deposit, Hokkaido

Abstract

We have estimate the formation temperatures of chlorites occurred in the hydrothermal alteration halo around Toyoha vein type ore deposit, Hokkaido, using the chlorite chemical geothermometer developed by Inoue et al. (2009). We focused on the determination of the ferric iron contents in chlorites by means of XPS in this study. The estimated temperatures were compared with the present subsurface temperatures and the filling temperatures of fluid inclusions in associating minerals in order to verify the chlorite geothermometer.