REE characteristics of microfine disseminated gold ores in Danzhai, Guizhou

Described in this paper are the fundamental characteristics of mineralization of gold ores in the Sandu-Danzhai Hg-Sb-As-Au ore belt of Guizhou Province. Through systematic sampling of the industrial orebody and alteration zone, the total amount of the rare-earth elements, that of the light rare-earth elements, Eu depletion and other parameters are clarified. There have been distinguished two types of REE distribution patterns: the “clay type” and the “quartz type”. High-grade orebodies are closely related with silicification, illitization and pyritization. The seven-component diagram of the REEs of even numbers in the periodic table (Balasov, 1966) is capable of distinguishing ore-bearing from ore-barren deposits.