PROSPECTING WITH COMBINATION OF GROUND MAGNETIC SURVEY AND WELL LOGGING: A Case Study of the Galinge XI Orefield in Qinghai Province

The Galinge orefield, containing iron with polymetallic deposits of copper, cobalt, lead and zinc, is covered by Quaternary overburden about 200 m thick. The most direct and effective exploration methods are ground high-precision magnetic survey and three-component magnetic logging. The combination of ground magnetic survey and three-component data processing and analysis is applied to guide the layout of geological drilling and find blind orebody, which has achieved good results. Particularly, the three-component magnetic survey is more effective than the ground method in some way. The three-component borehole has been one of the essential methods to find magnetite ore and magnetic associated polymetallic deposits.