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J4 ›› 2011, Vol. 19 ›› Issue (2): 1-7.

• article •     Next Articles

The Ore Grade Distribution Features and Grade Prediction of Maquan Gold Deposit,Gansu Province

LU Tiaojian   

  1. Gansu Vocation and Technology Institute of Industry,Tianshui 741025,Gansu,China
  • Received:2011-01-17 Revised:2011-03-19 Online:2011-04-28 Published:2012-05-11

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Abstract:

Through comparison the ore grade distribution situation of Maquan gold deposit and the corresponding mathematical model,we discover ore grade distribution law shows log-normal distribution,theoretically prove that ore grade is controlled by 1~2 major geological factors,the occurrence mineral of gold elements is mainly arsenopyrite and pyrite mine,gold has a selective for sulfide,but forming of the deposit is more times superposition results. The mathematical model of ore grade distribution is mean 3.566×10-6,2.006×10-6 variance for log-normal distribution. Through study of the average grade of ore deposits,geometry average,arithmetic average and the coefficient of variation,we think that the deposit belongs to grade uniformity deposit,and boundary grade is 1.0×10-6,lower limit of high-grade is 29×10-6.High-grade orebody （10×10-6~17.78×10-6）has prospecting potential.23 exploration line of the deposit is located in the elevation between 1 800~1 700 m,and it has great development potential.

Key words: Gold grade, Distribution characteristics of grade, Log-normal distribution, Maquan gold mine；Gansu Province

CLC Number: 

  • P618.51

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