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Trace Element Characteristics of Fluorite and Its Sm-Nd Isotopic Dating in Getang Gold Deposit, Guizhou Province

Huang Jianguo 1,2, Li Hujie 1, Li Wenjie 1, Dong Lei 1   

  1. 1.College of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, China;
    2.College of Resource and Environment Engineering, Guizhou University, Guiyang 550003, China)
  • Received:2012-07-24 Revised:2012-08-17 Online:2012-10-10 Published:2012-10-10

Huang Jianguo, Li Hujie, Li Wenjie, Dong Lei. Trace Element Characteristics of Fluorite and Its Sm-Nd Isotopic Dating in Getang Gold Deposit, Guizhou Province[J]. Advances in Earth Science, DOI: 10.11867/j.issn.1001-8166.2012.10.1087.

Trace element characteristics of symbiotic fluorite with Getang gold deposit have shown that: Its high-temperature element (including Mo, W, As, Cd, Bi, etc.) have higher contents than the crustal values. Those elements (including V, Cr, Cu, Cs, Th, Mo, Ga, Ge, etc.) have bigger coefficient of variation and strong activation energy. Fluorite’s total REE is low, only 10.299×10-6~17.455×10-6, and enrichment of heavy rare earth is obvious (LREE/HREE is 0.48-0.69), and have negative anomalies of Eu and Ce (δEu=0.71-0.91,δCe=0.62-0.78). The Tb/Ca vs. Tb/La diagram shows that fluorite is hydrothermal and is in its late stage. Rb/Sr ratios of fluorite and its initial 87Sr/86Sr ratios are closer to the mantle value, which reflect that its ore-forming fluids are from the upper mantle or (magma) deep. The formation of fluorite experienced a long-term evolution of the hydrothermal activity, lower ore-forming temperature (<200°~250°), and mineralization age is 35.83±0.37 Ma (Sm-Nd isochron age)

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