ANALYSIS ON THE MAGNETIC ANOMALY OF GROUP V OF GALINGE OREFIELD IN QINGHAI PROVINCE

The Galinger orefield is located on the edge of Qaidam Basin, with ore bodies of mainly magnetite, locally with lead, zinc and copper. The region is covered by Quaternary gravel overburden with thickness of 180-300 m. The obvious magnetic difference between the orebodies and surrounding rocks makes the magnetic survey in the area mostly direct and effective. Due to the great depth of the orebodies, the ground measured ΔT abnormal is unclear, thus the inference and interpretation for the ores exist errors or multiplicity. The new technology and methods of reduction to the pole, analytical continuation and wavelet multi-scale decomposition add information for analysis and eliminate the interference factors. The method is applied in the prospecting for Group V ores in Galinger orefield. A magnetite body with an average thickness of 50 meters was found in depth from 450 to 650 meters, which has been verified by drilling.