Application Of Integrated Electrometry In Graphite Exploration Of Datonggou South Mountain-Yellow Mine,Qinghai Province

On the basis of systematic analysis of the data from previous achievements,relying on known mineral belts and physical and chemical anomalies,and making full use of the new theory of ore prospecting,we have carried out a special filling map of crystalline graphite ore in the Datonggou south mountain-Yellow mine.The metallogenic model of typical graphite deposits in different mineral belts in the northwestern margin of the Qaidam Basin was initially constructed,and the Geophysical model of typical graphite deposits in different mineral belts in the northwestern margin of the Qaidam Basin was established.Marble and quartz sandstone are widely developed in the area,and dacite dike,granite porphyry vein,and quartz vein are locally visible.Graphite mineralization,coal-containing graphite ore,and carbonaceous sandstone can be seen in marble and quartz sandstone.Graphite mineralization,coal-containing graphite ore,and carbonaceous sandstone have extremely low resistivity and high polarization rate.They are excellent electronic conductors and generally produce very strong natural electric fields and excited electrical anomalies.The rocks that do not contain mineral marble,quartz sandstone,dacite,and granite porphyry have the characteristics of high resistivity and low polarization,and cannot produce obvious natural electric field and electric excitation anomaly.This paper discusses the application effect of natural electric field method and excitation method of graphite mine in the Datonggou south mountain-Yellow mine,and has carried out the natural potential profile measurement and the symmetric four-level electric depth measurement,the negative potential anomaly of ore prospecting mark,and the low resistance height polarization characteristics.The area carried out a 1/5000 natural electric field section survey of the newly discovered graphite ore site of 45.75 km,and traced the extension of the ore body.Nine autoelectric negative abnormal areas caused by graphite mineralized bodies were identified and one autoelectric anomaly zone was divided.The size and amplitude of the anomaly zone are large,and it is in good agreement with the graphite mineralization zone found on the surface of the surface.The plane anomaly range and extension direction of the graphite mineralization body are initially determined.A total of 30 points were laid for measuring the depth of the vertical mineralization of graphite in the region with good self-negative emission,and seven "low-resistance high-polarization" anomalies were identified,and the self-negative anomalies were further verified.The buried depth and space distribution of known graphite mineralized bodies were identified.It is the Jinhong mountain area.The natural electric field method and the excitation electric method verify each other and complement each other.Through Geological measurement and surface engineering verification,it is shown that the anomaly has played a direct guiding role in ore prospecting and has achieved good application results.