Journal of Jilin University(Earth Science Edition) ›› 2020, Vol. 50 ›› Issue (5): 1450-1461.doi: 10.13278/j.cnki.jjuese.20190279

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Metallogenic Prognosis Model of Xiyi Large Hidden Lead-Zinc Deposit in Baoshan in Western Yunnan Province

Cheng Jialong, Cui Ziliang, Li Jun   

  1. Yunnan Institute of Geology and Mineral Resources Exploration, Kunming 650051, China
  • Received:2019-07-20 Online:2020-09-26 Published:2020-09-29
  • Supported by:
    Supported by Project of China Geological Survey (12120114014001, 121201004000150017-82, 121201004000160901-38,121201004000160901-35, DD20190159-32)

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Abstract: Xiyi Pb-Zn deposit is located in the middle-north section of Baoshan block. The orebodies are mainly hosted in the Lower Carboniferous calcareous rocks of Xiangshan Formation. By using metallogenic prognosis theories and methods in the exploration area, Xiyi large scale hidden lead-zinc deposit was systematicly studied. The deposit genesis is of submarine exhalative sedimentary (SEDEX-type) with hydrothermal superimposion. The metallogenic geological bodies are secondary clastic and carbonate sedimentary rocks in the edge of Baoshan basin, which are superimposed by the Late Paleozoic (Devonian and Early Carboniferous) concealed magmatic rocks. The metallogenic structures are NE or concealed faults and fault fracture zone; the metallogenic structural planes are lithologic interfaces and siliceous-calcium interfaces. The characteristic indicator of mineralization is characterized by mineralization and alteration zoning, and the orebodies exend laterally in NE or NW direction. On these bases, the metallogenic prediction model of stratum+structure+siliceous-calcium interface+mineralization and alteration zoning is established. By using this prediction model, we deliniated the favorable metallogenic areas and suggested the exploration work in the peripheral area of Lutu and Guangyi, where Pb-Zn ore bodies were found.

Key words: metallogenic geological body, metallogenic structure, structural plane, characteristic indication of mineralization, metallogenic prognosis model, Xiyi lead-zinc hidden large scale deposit, Yunnan Province

CLC Number: 

  • P612
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