The Fule Pb-Zn deposit is located in the southeastern part of the Sichuan-Yunnan-Guizhou (SYG) Pb-Zn mineralization district, which hosts significant Pb-Zn-Ag-dispersed elements deposits in China. Applying detailed mineralogy and elements analysis to the gangue minerals of the Fule Pb-Zn deposit, this paper reveals the characteristics and sources of ore-forming fluid, to help us understand the mechanism of mineralization. Based on the paragenesis sequence of the Fule deposit, the major elements and trace elements of gangue minerals were analyzed via Electron Probe Microanalyze (EPMA) and Laser Abrasion (LA)-ICPMS. Trace elements of carbonate in the Fule deposit reveal that there is a trend from various Eu anomaly to positive Eu anomaly and from a strong negative Ce anomaly to weak negative Ce anomaly, indicating precipitation of sulfide and dolomite are due to decreases of f(o2), temperature and pH. There is a trend of decrease of Fe and Mn from early to late mineralization, indicating Fe and Mn were released in a low pH environment and incorporated into dolomite. The Sr concentration of carbonate show an increasing trend, indicating the fluid continued to react with the wall rock, incorporating more Sr. Dolomite and calcite Fe-Sr and Mn-Sr illustrate that there are mixing of two fluids. We propose that mineralization is a result of mixing of metal-rich, oxidized acidic fluid and reduced alkaline fluid.

Publication name	ACTA PETROLOGICA SINICA, 32 (11):3418-3430; 2016
Author(s)	Liang Feng; Bi XianWu; Feng CaiXia; Tang YongYong; Wei DongXiao; Dai ZhiHui
Corresponding author	LIANG Feng   liangfeng@mail.gyig.ac.cn  1.Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550081, Peoples R China  2. Univ Chinese Acad Sci, Beijing 100049, Peoples R China

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