2009•Acta Geological SinicaRequires access

REE Characteristics of the Xiejiagou Gold Deposit,Eastern Shandong Province and Its Significance to Mineralizations

Wang Jian-guo

Abstract

A newly-discovered Xiejiagou gold deposit, located in Eastern Shandong Province, is an alteration-rock type gold one controlled by the ductile shear belt. Ore bodies occur mainly in the NE-trending ductile and brittle shearing zone containing pyritic sercitized mylonite and ultramiylonite. The paper studies the REE geochemical characteristics of biotite granites, dikes and ore. The results show that they are characterized by enrichment of LREE and depletion of HREE, with low ΣREE and no obvious Eu anomaly, and their chondrite-normalized REE plots are primarily consistent. It is suggested that the rock and ore-forming materials originated mainly from deep crust-mantle transitional zone, and the mineralization of Xiejiagou gold deposit is controlled by the Mesozoic large-scale crust-mantle interaction in eastern China.

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Key concepts: Geology, Geochemistry, Mylonite, Shear zone, Crust, Dike, Mantle (geology), Mineralization (soil science)