Neutral metasomatic rocks

Overview

Metasomatic rocks by neutral hydrothermal fluid associated with dacitic magma activities. Protoliths are dacitic volcanic rocks, plutonic rocks, and sedimentary rocks. Neutral metasomatic rocks are observed near island arc volcanoes and intra-oceanic arc volcanoes on volcanic fronts.

Neutral metasomatic facies series

Smectite zone > Interstratified mineral zone > Illite-Chlorite zone > Epidote-Actinolite zone