Some considerations on the crystallization teperature of eclogites in the Higasi-akaisi peridotite mass

On the basis of Fe2+-Mg partition between coehisting garnet and clinopyroxene of eclogites in the Higasi-akaisi peridotite mass, both from the Gongen valley and from the main adit of the Akaisi mine, it is suggested that the crystallization temperatnre of the eclogites in this peridotite mass corresponds to that of lower amphibolite fades. The temperature thus estimated appears to be higher than that of surrounding metabasites, and eclogites enclosed therein. The chemical compositions of six pairs of gamet-clinopyroxene assemblage, including the new analyses of three pairs, are described in Table 1.