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Metal Mine ›› 2016, Vol. 45 ›› Issue (10): 103-108.

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Ore-controlling Factors and Prospecting Prediction of Zhaxikang Pb-Zn Polymetallic Deposit，Southern Tibet

Li Hongliang1，Li Guangming1,2，Zhang Zhi2，Fu Jiangang2,3，Liang Shengxian2   

  1. 1.College of Earth Science,Chengdu University of Technology,Chengdu 610059,China；2.Chengdu Centre,China Geological Survey,Chengdu 610081,China；3.College of Earth Science and Resources,China University of Geosciences (Beijing),Beijing 100083,China
  • Online:2016-10-15 Published:2016-11-04

Abstract: Zhaxikang Pb-Zn polymetallic deposit is one of the most important hydrothermal vein type deposits in southern Tibet gold antimony metallogenic belt.Based on the detailed filed geological survey and indoor comprehensive analysis,the ore-controlling factors and the geological characteristics,geophysical characteristics and geochemical characteristics of the concealed ore-bodies that have been found in the mining area are analyzed synthetically,it is show that output of the ore-bodies of Zhaxikang Pb-Zn polymetallic deposit are strictly constrained by the two normal fault of high angle,which trending direction is SN and NW-SE,the metallogenic materials of Zhaxikang Pb-Zn polymetallic deposit are derived from lower-middle Jurassic Lure formation (J1-2l) and the Cuonadong leucogranite vault in the south of the mining area.Based on the above analysis results,according to the geological characteristics of the concealed ore-bodies that have been prospected in the mining area,the comprehensive prospecting factors of Zhaxikang Pb-Zn polymetallic deposit are summarized,which include outcrop of surface gossan,strong soil geochemical anomalies (Pb,Zn anomalies) and the electronic mutation interface (ore-bearing fault) in the audio-frequency magnetotelluric sounding (AMT) section,besides that,the prospecting prediction work with large scale is done,the similar comprehensive anomalies belt in the east of 40# exploration line，and the prospecting target area is delineated.The study result show that Zhaxikang deposit is a hydrothermal vein type Pb-Zn polymetallic deposit which is strongly controlled by faults，the ideal prospecting effects of the prospecting of concealed ore-bodies by using geological,geochemical and geophysical methods，the target area that is delineated by the methods can be treated as the important working area of the further prospecting work in the mining area.

Key words: Ore-controlling factor, Source of metallogenic material, Prospecting prediction factor, Comprehensive anomaly belt, Prospecting target area