日本のビスマス資源と世界の重要な供給源について
2008 年 58 巻 2 号 p. 131-138
詳細
2008 年 58 巻 2 号 p. 131-138
Bismuth can be supplied from two sources: primary Bi-bearing minerals concentrated in Sn-W polymetallic ore deposits, and by-product bismuth from sulfide concentrates from various ore deposits. The first example is best shown by the Shizhuyuan skarn-greisen-type Sn-W polymetallic deposits in southern China, and is still a major source for bismuth. This type of ore deposits occurs in carbonate rocks intruded by an ilmentie-series fractionated granite in a continental margin setting. New discovery of this type in a blind status, as exemplified at Nui Phao, northern Vietnam, is urgently needed, because the remaining ore reserves are only for 18 years.
