Li Zhen-li1,2, Ye Lin1, Huang Zhi-long1, Nian Hong-liang3, Zhou Jia-xi1,2
(1. State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. 317 Geological Team, Bureau of Nonferrous Metal Geology of Yunnan Province, Qujing 655000, China)
Abstract: The Tianqiao Pb-Zn deposit, located in the eastern part of the Sichuan-Yunnan-Guizhou Pb-Zn mineralization province, is a representative middle-sized Pb-Zn deposit in north-western Guizhou Province, P.R. China. There are different viewpoints about its genesis; most scientists mainly focus on the accumulation regulation of dispersed elements, characteristics of rare earth elements and isotope geochemistry, to study the genesis of the deposit. Few researchers have examined trace elements in sphalerite. Using ICP-MS, trace elements in sphalerite were analysed in this study. Results show that sphalerite is rich in Ge and Ga and poor in Mn, In, Sn and Cd, with a higher Zn/Cd ratio, which is clearly different from that of skarn-type, SEDEX-type and magmatic hydrothermal-type. However, it similar to sphalerite from classical MVT deposits (i.e. Mengxing and Niujiaotang deposit, etc.), except that the concentration of Cd (about 1282×10-6) is relatively lower, as compared to the Huize and Shanshulin Pb-Zn deposits in the same region. It is suggested that the Tianqiao Pb-Zn deposit belongs to a MVT Pb-Zn deposit, and formed at medium temperature.
Keywords: Tianqiao Pb-Zn deposit; trace element; sphalerite; MVT Pb-Zn deposit; ICP-MS
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ACTA MINERALOGICA SINICA Vol. 36, No. 2, 2016, Page 183-188
