Change of redox state during the antigorite serpentinization at Higashi-akaishi peridotite body, SW Japan

Abstract

Antigorite serpentinization is an important process for the fluid migration at the wedge mantle. Oxidization coincides with progression of the antigorite serpentinization at Higashi-akaishi peridotite body, indicated by the petrological studies of antigorite, altered chromite and sulfide minerals. Relativity reduce condition recorded in the samples is a legacy of peridotite stage. It is not brought by the serpentinization, as the formation of lizardite and chrysotile at low temperature.