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Gold Science and Technology ›› 2014, Vol. 22 ›› Issue (1): 15-21.doi: 10.3969/j.issn.1005-2518.2014.01.015

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Geological Characteristics and Indication for Prospecting in Laoyachao Cryptoexplosive Breccia Pipe Gold Deposit，Hunan Province

CAO Qiong1，PANG Xucheng1，WAN Keyong2，LUO Huabiao2，SI Jiangtao2   

  1. 1.Institute of Resources and Environment，Henan Polytechnic University，Jiaozuo   454000，Henan，China；
    2.No.217 Team of Hunan Geological & Mining Organization for Non-ferrous Metals，Hengyang   521000，Hunan，China
  • Received:2013-09-26 Revised:2013-11-20 Online:2014-02-28 Published:2014-06-25

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Abstract:

Laoyachao gold deposit is located in the famous Shuikoushan orefield，the exposed strata are the upper Devonian to lower Cretaceous，the lithology is carbonate，paralic clastic rocks and terrigenous clastic rock.The Indosinian fold and the SN trending fracture are developed，magmation is rather strong.The ore-forming material enriched in the axle of the overturned anticline，the fault zone and surrounding the rock.Laoyachao gold deposit occurs in cryptoexplosive breccia pipe，which is controlled by F1 fault and No.4 granodiorite，alteration of the wall rock is developmend，silicification，pyritization，zinc mineralization has a close relationship with mineralization.Gold mainly exists as native gold，distribute in the gaps of quartz，pyrite，sphalerite and the particle clearances.Mineralization can be divided into skarn stage，hydrothermal stage and supergene stage，hydrothermal stage is the main mineralization stage.Quartz-pyrite-sphalerite-native gold stage is the main stage of mineralization.The main prospecting mark is cryptoexplosive breccia，silicification，sphalerite and pyritization is closely associated with mineralization.

Key words: cryptoexplosive breccia, geological characteristics, prospecting significance, Laoyachao gold deposit, Hunan Province

CLC Number: 

  • P618.51

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