<資料>インドネシア・マレーシアの錫鉱床に伴う未利用鉱物資源について

Abstract

The annual production of tin in Southeast Asia has not increased significantly in the last 20 years in spite of new exploratory. The main reason are a relative increase in low-grade tin ore and a lack of large-scale mining operation. Tin deposits in Southeast Asia are, however, also accompanied with various kinds of useful minerals, such as ilmenite, zircon, monazite and xenotime, which have not been fully exploited. Efforts should be made to recover these minerals besides discovering new tin deposits, because extraction of these accessory minerals will, at the same time, result in an increase in the production of tin. In this paper the occurrence, aggregates and chemical composition of these minerals are discussed.