Drilling Results and Exploration Update
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Modern Gold Mining in Japan
Hishikari mine is the largest active gold mine in Japan. Gold
production is about 225 Koz per year. A head grade of 30 gpt
Au is achieved by ore sorting, optical ore sorters used for small
pieces of rock and hand labor used for sorting larger pieces
(right).
Hishikari has no mill. High-grade ore is shipped to Sumitomo
Metal Mining's smelters where it is utilized as smelter flux.
Gold and silver are recovered during smelting and refining of
copper resulting in high recoveries and low processing costs.
Similarly, silica-rich gold ores ("keisan-ko") from the Akeshi
mine (Mitsui Kushikino Kozan Co. Ltd.) and Kasuga and Iwato
mines (Nippon Mining) are utilized for smelter flux.
The Kushikino mine complex (Mitsui Kushikino Kozan Co. Ltd.)
is the only operating gold mine utilizing a CN mill for
processing. Gold-bearing industrial waste and low grade ore
(~18 gpt Au) from Hishikari are also treated at this facility.
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