Ohgama Mines

To Improve and Maintain Quality and to Meet Tomorrow’s Needs

The Kuzuu District belongs to the Chichibu Paleozoic stratum，and dolomite mines are exposed in the form of semi－horseshoe shape，and dolomite occurs in limestone in layers The stratum is formed in order of upper limestone，dolomite，lower limestone，and sandstone from the top，and tilts inwards by about 30 degrees．Ohgama Mines are located in the northern part of the Kuzuu District，and the stratum lies east and west tilted by 20 to 25 degrees．The thickness of the stratum is assumed to be about 80 to 100 meters．The dolomite quality is high and stable．

Chemical composition of dolomite

Process Chart

Development

With the effective utilization of abundant natural resources set on the basis，fusing domestic resources with overseas resources，constant efforts will be continuously made to maintain high added values under stringent quality control in order to meet diverse needs of our customers．

The engineering staff at Tazawa will take on further challenges not only in acquiring still wider knowledge to satisfy requirements of wider ranges covering agricultural materials to steelmaking materials but also in still more improving the customers′reliability and satisfaction by flexibly meeting customers′ needs．