This paper describes a method for estimating the continuation of ore bodies at depth based on concentrationvolume(C-V)fractal modeling of the pyrite thermoelectric coefficient in the Pujon gold deposit,Democratic Peo...This paper describes a method for estimating the continuation of ore bodies at depth based on concentrationvolume(C-V)fractal modeling of the pyrite thermoelectric coefficient in the Pujon gold deposit,Democratic People’s Republic of Korea.The method is first established using data in the Kumjomdong area,a well-explored brownfield,and it is then applied to estimate the continuation of ore bodies at depth in the Pyongsandok area,a less-explored greenfield.The methodology consists of four steps:(1)3D modeling of ore bodies using surface geological mapping,mining tunnels in different levels,and a borehole dataset;(2)3D modeling of thermoelectricity coefficients from Au-bearing pyrites based on discrete smooth interpolation and C-V fractal techniques;(3)determination of levels used for calculation of the thermoelectric parameter of pyrite by C-V fractal modeling instead of traditional levels;and(4)determination of the thermoelectric parameter vertical gradient of pyrite reflecting the variation characteristics of pyrite thermoelectricity in the Pujon deposit.The results indicate that(1)pyrites in the Pujon deposit are dominantly P-type,and it is not reasonable to use traditional levels to calculate the thermoelectric parameter of pyrite;(2)thresholds determined by C-V fractal modeling can be used as levels to calculate the thermoelectric parameter of pyrite;(3)the thermoelectric parameter vertical gradient of pyrite ranges from 1 to 2 in the Pujon deposit;and(4)ore body Pyongsan No.9 extends 85 m to 235 m downward from the current borehole location.展开更多
文摘This paper describes a method for estimating the continuation of ore bodies at depth based on concentrationvolume(C-V)fractal modeling of the pyrite thermoelectric coefficient in the Pujon gold deposit,Democratic People’s Republic of Korea.The method is first established using data in the Kumjomdong area,a well-explored brownfield,and it is then applied to estimate the continuation of ore bodies at depth in the Pyongsandok area,a less-explored greenfield.The methodology consists of four steps:(1)3D modeling of ore bodies using surface geological mapping,mining tunnels in different levels,and a borehole dataset;(2)3D modeling of thermoelectricity coefficients from Au-bearing pyrites based on discrete smooth interpolation and C-V fractal techniques;(3)determination of levels used for calculation of the thermoelectric parameter of pyrite by C-V fractal modeling instead of traditional levels;and(4)determination of the thermoelectric parameter vertical gradient of pyrite reflecting the variation characteristics of pyrite thermoelectricity in the Pujon deposit.The results indicate that(1)pyrites in the Pujon deposit are dominantly P-type,and it is not reasonable to use traditional levels to calculate the thermoelectric parameter of pyrite;(2)thresholds determined by C-V fractal modeling can be used as levels to calculate the thermoelectric parameter of pyrite;(3)the thermoelectric parameter vertical gradient of pyrite ranges from 1 to 2 in the Pujon deposit;and(4)ore body Pyongsan No.9 extends 85 m to 235 m downward from the current borehole location.
