Application Of Transient Electromagnetic Method To Deep Geological Prospecting For The Sipingshan Gold Mining Area

Transient electromagnetic method (TEM) is a rising geophysicalprospecting method. Working principle: Pulse current is provide by labor,and produce a transient electromagnetic field, which vertical launch coil totwo different direction: spread to underground and upper half space, andneglect spatial field above ground. The useful signal spread to theunderground will give different reponse when encounter different geologicbody. According to different feedback information from the geologic body,nature and distributed characteristics of corresponding geologic body. This isworking principle for TEM.Based on “Deep orebody general survey for the Sipingshan golddeposit in the Hulin, Heilongjiang province”project, we carried outresearch on discovered surface orebodies in the Sipingshan gold deposit inorder to discover deep bline orebody.According to research on strata, tectonic and gold orebodies in theSipingshan gold deposit, we ascertained that relationship with orebodies andanomaly of electrical resistivity and polarizability for the Sipingshan gold deposit, and established geology-geophysics prospecting model.Summarized ore-forming characteristics and regularity of the Sipingshangold deposit, we ascertained volcanic mechanism, volcanism andore-forming conditions.The exploration of research methods is mainly TEM and sounding ofinduced polarization, combining pre-existing geology, geophysics data inorder to carry on reseach. Data collection and deploy for transientelectromagnetic in field adopted CUGTEM data collection system andMapsource, and overcome complex terrain in the work area and difficulty ofconstruction. The data processing is achieved by CUGTEM data collectionsystem, which can only produce JPG graphic file, so second data processingadopted Geoipas and Mapgis software.The explain for electromagnetism anomaly is that comprehensiveconsideration of IP and high magnetic anomaly, we considered thatperspecting model is high electrical resistivity after profound understand oredeposit characteristics and ore-controlling factors.