2001•Journal of Mineralogy and PetrologyRequires access

REE GEOCHEMISTRY OF THE XIACUN SILVER-POLYMETALLIC ORE DEPOSIT IN SICHUAN PROVINCE

Zhu Wei-guang

Abstract

The Xiacun silver-polymetallic ore deposit is a typical volcanic-hosted massive sulfide deposit in Yidun Late Triassic island arc volcanic belt. REE geochemical studies of ores, altered rocks and hydrothermal-sedimentary rocks from Xiacun deposit indicate that the patterns in ore fluids are characterized by LREE enrichment and remarkable positive Eu anomalies. The REE of ores is determined by their forming temperture .Above evedence in combination with isotopic data reveals that the ore-forming material was mostly derived from the underlying volcanic rocks.

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Key concepts: Geology, Geochemistry, Volcanic rock, Sedimentary rock, Ore genesis, Hydrothermal circulation, Polymetallic replacement deposit, Volcano