Gold dust
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Gold exists as placer ore. It is found in the gravel of riverbeds and beaches as small pieces, but sometimes large nuggets are found. The purity is usually over 800/1000. It coexists with magnetite, ilmenite, quartz, monazite, zircon, etc. On a small scale, it is separated from the gravel by a cat-floating method, and on a large scale, it is collected by gold mining boats and separated by specific gravity. In Japan, it is found in the Sorachi River and Teshio River in Hokkaido. → Related topics Gold | Gold mines | Placer deposits | Gold mines Source : Heibonsha Encyclopedia About MyPedia Information |
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砂鉱として存在する金。河床や海浜の砂礫(されき)中に細片で散在するが，ときには大型の塊金が出ることもある。純度は通常800/1000以上。磁鉄鉱，チタン鉄鉱，石英，モナズ石，ジルコンなどと共存する。小規模にはねこ流しで砂礫と分離，大規模には採金船で採取，比重選鉱を行う。日本では北海道の空知川，天塩川などに産する。 →関連項目金｜金鉱｜砂鉱床｜山金 出典 株式会社平凡社百科事典マイペディアについて 情報 |
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