| The Qingchengzi gold ore concentration area is located in the northeast of Qingchengzi Town,Fengcheng City,Liaoning Province.The geotectonic location is in the middle of the Liao-Ji rift zone in the Paleoproterozoic.A series of large-medium-sized gold deposits developed in the area,such as: Baiyun Gold Mine,Linjia Sandaogou Gold Mine,Xiaotongjiapuzi Gold Mine,etc.Based on the collection,sorting and analysis of previous research results,and guided by the theory of ore field structure,this paper systematically carried out a systematic analysis of typical gold deposits in the Qingchengzi Gold Mine Concentration Area through a large number of field geological surveys and comprehensive analysis of indoor data.The study of the geological characteristics of the deposit and the structure of the ore field restored the paleo-tectonic stress field,summarized the law of structural ore control,and proposed the direction of deep prospecting.The specific understanding mainly includes the following points:The ore-controlling structures in the Qingchengzi gold ore concentration area are mostly EW and NNW directions.The NNW rightward-strike-slip Jianshanzi fault is a primary ore-controlling structure in the area,which controls the distribution of the Linjia Sandaogou,Taoyuan,Xiaotongjiapuzi gold deposits along the fault strike;the main manifestation of the metallogenic structure It is a EW-trending detachment structure.The gold ore bodies mainly occur in the lower part of the Gaixian Formation and the contact part of the Dashiqiao Formation and the Gaixian Formation;Ore body,but the overall damage to the gold deposit is small.The morphology and distribution of gold ore bodies in the Qingchengzi gold ore concentration area are greatly affected by the fault-controlled ore structure.The gold orebodies in the Baiyun and Xiaotongjiapuzi mining areas have the phenomenon of pinpointing and reappearance,which are arranged at nearly equal intervals.The ore body of Baiyun gold deposit lies sideways to SW,and the ore body of Xiaotongjiapuzi gold deposit lies sideways to NW;the ore body of Sandaogou gold deposit in Linjia is lying flat and lentil-shaped.The thickness and grade of the ore body have a positive correlation.The correlation coefficient between gold grade and thickness in Baiyun mining area is 0.38,the correlation coefficient between gold grade and thickness in Linjia Sandaogou mining area is 0.31,and the correlation coefficient between gold grade and thickness in Xiaotongjiapuzi mining area is 0.38.Bit 0.88.Through the occurrence measurement and statistical analysis of multiple gold veins,pyrite veins and quartz veins in the ore concentration area,the direction of the tectonic stress field in the Qingchengzi gold ore concentration area can be obtained.The Baiyun gold deposit was squeezed in the NW-SE direction during the mineralization period,and was squeezed in the NW-SE and NE-SW directions after the mineralization.The main stress direction of the Sandaogou gold deposit in Linjia during the mineralization period is NE-SW,and after the mineralization,it is the SN direction.The main stress direction of the Xiaotongjiapuzi gold deposit during the mineralization period is NW-SE,and after the mineralization,it is NW-SE.Based on the structural analysis of the various gold ore bodies in the ore concentration area,combined with the exploration and drilling data of the mining area,it can be known that the western Baiyun gold mine,the area near the Sandaogou gold mine of Linjia,and the deep part of Xiaotongjiapuzi have good prospecting potential..The specific prospecting areas are the southwest of vein 60 on the 40-48 exploration line of Baiyun gold mine,300-260 on the west side of No.5 ore body of Sandaogou gold mine in Linjia,and the 48 exploration line in the middle section of Xiaotongjiapuzi-200 m.Prospecting potential. |
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