Sandstone compositions of so-called "Hidaka Supergroup" in the Erimo area, southeastern part of Hokkaido, Japan

Characteristics of sandstones from so-called "Hidaka Supergroup" in the Erimo area were discussed based on modal compositions and chemical compositions of heavy minerals by means of an electron-probe microanalyser. The modal compositions suggest transitional to undissected arc provenance. Chemical features of detrital grains indicate that intermediate to basic rocks, partly metamorphosed to intermediate grade, and peridotites of arc or fore-arc origin were exposed on the land. These formations in the Erimo area can be correlated to the Nakanogawa Group in the Hidaka Belt.