Journal of Jilin University(Earth Science Edition) ›› 2018, Vol. 48 ›› Issue (5): 1394-1404.doi: 10.13278/j.cnki.jjuese.20160287

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Prospecting Potential and Primary Halo Characteristics of Dongping Pb-Zn Deposit in Qiaojia County, Yunnan

Ming Tianxue1,2, Tang Zhong1,2, Li Yongping1, Luo Jianhong1, Li Rong1,2, Xue Ge1, Chen Lei1   

  1. 1. Institute of Yunnan Geology Survey, Kunming 650051, China;
    2. Key Laboratory of Sanjiang Metallogeny and Resources Exploration and Utilization, Ministry of Land and Resources, Kunming 650051, China
  • Received:2017-09-26 Published:2018-11-20
  • Supported by:
    Supported by Project of China Geological Survey(12120114013901) and National Key Basic Research Program of China(2015CB452605)

Abstract: The Dongping Pb-Zn deposit,located in the southwest edge of Yangtze platform in the northeastern Yunnan, is a representative deposit with low research and exploitation. In the shape of vein and layer, the orebodies mainly occur in dolomites of the Sinian Dengying Formation, and are obviously controlled by the fractures and their Si/Ca surfaces. The major ore minerals are galena and sphalerite. The wall-rock alteration includes silicification, dolomitization, pyritization. The δ34S‰ value of the sulfides implies that the sulfur was likely derived from seawater and went through a series of thermal chemical sulfate reduction (TSR). The lead isotopic composition of sulfides indicates an extremely radiogenic feature similar to that of the crust. The mineralization is characterized by multiple stages of ore-forming evolution and overlapped by late fluids. A great amounts of lead were formed in the major metallogenic stage with a little zinc formed in the early stage. The near halo Pb, Zn components in borehole S5ZK001→ZK001→S4ZK001 are distributed from shallow to deep from the south-west to the north-east, the same as with those of the borehole ZK001→ZK701-1→ZK1701→ZK3901. With ZK001 as the center, the ore bodies have a bigger buried depth in the south-east and north-east parts of it. There is a certain prospecting potential in the deep part of the north-east (S4ZK001) and the south-east (ZK3901).

Key words: Dongping Pb-Zn deposit, geology characteristics, primary halo characteristics, prospecting potential

CLC Number: 

  • P588.1
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