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Gold Science and Technology ›› 2013, Vol. 21 ›› Issue (4): 32-38.

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Study on the Genisis of the Baimashan Gold Deposit,Gansu Province

LIU Shiqiang,WANG Jianzhong,DANG Manhong,FAN Wujie,WANG Shujuan   

  1. No.5 Gold Geological Party of CAPF, Xi’an   710100,Shaanxi,China
  • Received:2013-01-18 Revised:2013-03-24 Online:2013-08-28 Published:2014-01-26

Abstract:

The Baimashan gold deposit is located in the south ore-forming sub-belt of the southern Qinling Moutains area.Moutains The Ore body is en echelon distribution taking on NE,and compoundly controlled by the stratum (limestone,slate) and NE to the second-order faults,which is the main ore-controlling factors(structure).Ore bodies occur in contact regions of the limestone and marble and the slate.Hydrothermal alterations are mainly pyrite,marbleization and chloritization.Gold is given priority to with microscopic gold,accidentally see natural gold.By comparing the features of Baimashan gold deposit with the carlin-type gold deposit of Daqiao,Luerba and Shuiyindong,found that these deposits have a certain similarity in Au-Ag-As-Sb elements combination,ore mineral composition and altered mineral combination,and showed the deposit with the epithermal ore forming characteristics.Therefore,Baimashan gold deposits is more close to the carlin-type gold deposit,and has a big difference for the orogenic gold doposit and the magmatic-hydrothermal gold deposits.Combined with the geological background in southern Qinling and the latest research progress of carlin-type gold deposit,speculated that Baimashan gold deposits may be a fault-carlin type gold deposit,recommended that the further work should be mainly revolves the NE to the second-order faults.

Key words: gepithermal, genisis, carlin-type gold deposit, Baimashan gold deposit, Gansu Province

CLC Number: 

  • P618.51

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