Abstract
Cinnabar was found in a fault zone cutting the main ore bodies of the Shirataki mime which is one of the large bedded cupriferous pyritic deposits in the Sambagawa crystalline schist formation in Shikoku. The mineral occurs as fine crystals or aggregates in a druse or one of vein-stuffs of quartz or/and calcite veins cutting host rocks. It is also disseminated in the host rocks near the fault zone. The mercury mineralization is thought to be occured after the faulting, probably during Neogene in age.
