Dairishiko Iron Ore Deposit is located about 10 km southwest of Rinko ( ?? ?? ) Tsuka province (on the bank of the Oryokko River), Manchoukuo., The ore bodies are the irregular mass of goethite and rather parallel beds in the so-called Utai dolomitic limestone, containing hematite, chlorite (thuringite) and the small amount of pyrite, chalcopyrite, and zincblende, penetrated by small dolomite and quartz veins., The ore deposit consists of limonite or siderite beds or other iron-bearing sediments secondarily enriched by weathering and hydrothermal solution., Hatidoko( ?? ?? ?? ) Iron Ore Deposit, located about 8 km northwest of Hatidoko, is an iron ore bed at the basal portion of Sinian quartzite, a shallow sea deposit., The ore is the quartz-hematite sandstone (Fe : 30∼40%), containing quartz, hematite, orthoclase, plagioclase and microcline, cemented with sericite, penetrated by quartz veins or porohyrilic dikes showing irregular enrichment (Fe : about 60%)., The deposit was formed by the primary deposition of hematite and clay minerals changed to sericite by the thermal metamorphism of dike rocks.,
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