Study On Geochemical Characteristics And Ore Controlling Factors Of Bo Daoling Silver And Gold Mine,Guangshan County,Henan Province

Bo daoling silver and gold mine is located in the north slope of the western section of the dabie orogenic belt,and the regional tortoise(mountain)-mei(mountain)fault(the malting ductile shear zone)passes through the central part of the area from east to west,forming a tectonic fracture zone,mylonitic zone and tectonic schist zone with a width of several hundred meters,laying a regional tectonic framework.The strata in this area are bounded by the tortoise(mountain)-mei(mountain)fault(liangting ductile shear zone).The strata in the north of this area belong to the xinyang-shangcheng area in the north qinling formation area,and the strata in the south of this area belong to the xixia-dabie area in the south qinling formation area,and the post-triassic strata belong to the northern foothill basin of dabie mountain.Based on the summary of geophysical and geochemical data and geological characteristics of ore deposits,this paper analyzes the ore-controlling factors of the Bo daoling silver and gold mine deposit,providing geological basis for oreprospecting in the study area.The deposit is controlled by the malleable ductile shear zone,and the orebody mainly occurs in the stratum of the tortoise rock formation.The distribution of the ore body is controlled by the ductile brittle tectonic fracture zone.In the tectonic fracture zone,the ore body is arranged in a nearly east-west parallel or echelon pattern,and it is inclined to the south.The single orebody shows a soothing wave along the strike and tendency.The trace elements in the stratum show that the Ag,As and W anomalies can be formed in the stratum of the tortoise rock formation,and the silver ore body strata can be formed locally,which are the ore-bearing strata.The characteristics of trace elements in the main rocks indicate that the distribution characteristics of Ag and Au elements have a certain similarity,which is consistent with the results of correlation analysis.Gangue quartz and sericite quartz schist are important ore-bearing rocks,which are closely related to the formation of silver and gold deposits in the mining area.According to the composition of trace elements in ore,the ore deposit should be of medium and low temperature hydrothermal type,dominated by surrounding rock materials and superimposed hydrothermal mineralization.In the study of geochemistry,the characteristics of trace elements in ore-bearing structures,and the change rule of trace elements in vertical direction were respectively used;C.b.grigolian zonal index method was used to calculate the axial zonal sequence of elements to study the vertical zonal characteristics of mineral deposits.Axial changes according to the geochemical parameters of a = front halo elements(content,additive and multiplicative)/tail halo elements(content,additive and multiplicative)from the upper to the lower ore bodies gradually reduce model,selection of front elements As,Sb and tail elements Bi,W,Mo,4 line exploration profile are calculated respectively the ratio of different elevation(cross section)indicator elements.These methods show in the deep of Bo daoling there being a continuation or instructing the deep blind ore bodies.