On the Mode of Occurrence of Silver or Silver Minerals of the Toyoha Mine

Abstract

The mode of occurrence of silver or silver minerals in the Toyoha lead, zinc and iorn sulphides mine is classified into several types. The chracteristics of each type are described in detail. Mode of occurrence of silver and silver minerals in lead, zinc and iron sulphides concentrates is also discussed. Finally the ratio of the amount contained in each type of occurrence in the ore is calculated quariti-tatively.