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Gold Science and Technology ›› 2013, Vol. 21 ›› Issue (4): 20-25.

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Discussion on the Characteristics and Metallogenic Mechanism of Ductile Shear Zone in Bayanwenduoer Gold Deposit,Inner Mongolia

ZHANG Yong1,2,WANG Cuixian3,LUO Xuehui1,CHAO Yinyin1,4,XU Tao1   

  1. 1.Gold Geological Institute of CAPF,Langfang   065000,Hebei,China;
    2.School of Earth and Space Sciences,Peking University,Beijing   100871,China;
    3.No.2 Gold Geological Part of CAPF,Hohhot   010010,Inner Mogolia,China;
    4.Geoscience and Resource Academy,China University of Geosciences,Beijing   100083,China
  • Received:2013-01-06 Revised:2013-04-13 Online:2013-08-28 Published:2014-01-26

Abstract:

The Bayanwenduoer gold deposit was located in the volcanic passive margin between north China plate and Siberia plate and on the collision belt for them.The deposit was controlled by the Bayanwenduoer-barunsarah ductile shear zone,and the tectonic deformation was mainly in Indosinian.The mylonite series were well developed.And the whole pattern of ductile shear zone is stagger appearance of strong and weak strain.It had obvious typical macro and micro structural characteristics in the zone,and also has ductile shear deformation characteristic which is form left lateral to right lateral.The formation temperature of the ductile is about 220 ℃,the formation pressure is about 270 Mpa,and the formation depth is 11 km under the ground.It is given priority to with low temperature alteration about silicification,pyritization,sericitization,chloritization,petrochemical,galena,sphalerite,clay,etc,and belongs to the shear deformation at low temperature.Based on the geological background,geological characteristics of the deposit,ductile shear zone in the macroscopic and microscopic characteristics and evolution analysis,we discussed the mechanism for the formation of gold deposit,and provided a strong guidance for future geological survey research and metallogenic prediction.

Key words: ductile shear zone, metallogenic mechanism, Bayanwenduoer gold deposit, Inner Mongolia

CLC Number: 

  • P618.51

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