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Trace Elements and Rare Earth Elements of Sulfide Minerals in the Tianqiao Pb-Zn Ore deposit,Guizhou Province,China

Acta Geologica Sinica(English Edition) 2011年第1期85卷 189-199页

作者： ZHOU Jiaxi HUANG Zhilong ZHOU Guofu LI Xiaobiao DING Wei BAO Guangping State Key Laboratory of Ore deposits Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

Trace elements and rare earth elements（REE） of the sulfide minerals were determined by inductively-coupled plasma mass *** results indicate that V,Cu,Sn,Ga,Cd,In,and Se are concentrated in sphalerite,Sb,As,Ge,and Tl are concentrated in galena,and almost all trace elements in pyrite are *** Ga and Cd contents in the light-yellow sphalerites are higher than that in the brown and the black *** contents of Ge,Tl,In,and Se in brown sphalerites are higher than that in light-yellow sphalerites and black *** shows that REE concentrations are higher in pyrite than in sphalerite,and *** sphalerites,the REE concentration decreases from light-yellow sphalerites,brown sphalerites,to black *** ratios of Ga/In are more than 10, and Co/Ni are less than 1 in the studied sphalerites and pyrites,respectively,indicating that the genesis of the Tianqiao Pb-Zn ore deposit might belong to sedimentary-reformed genesis associated with hydrothermal *** relationship between LnGa and LnIn in sphalerite,and between LnBi and LnSb in galena,indicates that the Tianqiao Pb-Zn ore deposit might belong to sedimentary-reformed *** on the chondrite-normalized REE patterns,δEu is a negative anomaly（0.13-0.88）,andδCe does not show obvious anomaly（0.88-1.31）;all the samples have low total REE concentrations（〈3 ppm） and a wide range of light rare earth element/high rare earth element ratios（1.12-12.35）.These results indicate that the ore-forming fluids occur under a reducing *** REE compositions and parameters of sphalerites,galenas,pyrites,ores,altered dolostone rocks,strata carbonates,and the pyrite from Lower Carboniferous Datang Formation showed that the ore-forming fluids might come from polycomponent systems,that is,different chronostratigraphic units could make an important contribution to the ore-forming *** with the tectonic setting and previous isotopic geochemistry evidence,we conclude that

关键词： trace element rare earth element sphalerite galena pyrite deposit genesis Tianqiao PbZn ore deposit

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