The Study Of Application And Characteristic Analysis In Aeromagnetic Anomaly After Reduction-to-the-Pole

With the rapid economic development, the demand for solid mineral resources is also growing. As the terrain better and near the surface of the mineral resources are decreasing, so workers will geophysical exploration work focused on remote areas and on deep mineral development. Aeromagnetic survey as an important magnetic geophysical exploration methods, in a large area of energy exploration on the mineral has its own advantages, so in equipment, technology has also been a rapid development.Aeromagnetic data processing and conversion is magnetic prospecting improtant part of inference and interpretion ,in the oblique magnetic conditions aeromagnetic data processing work,the treatment of reduction to the pole is often essential. First, this paper expatiates status quo of the current application of the aeromagnetic survey at home and abroad , then emphatically analyze that it is diferent in the precision ground magnetic survey and aeromagnetic anomaly, it obtain that aeromagnetic data obtained can be reducted to the pole, but ground magnetic measurement data can not be reducted to the pole; throuph the spatial domain processing compared to the frequency domain, discussed the superiority of reduction to the pole in the frequency domain, expatiates the basic theory,formula derivation , data processing realization.In this paper, on the basis of reduction to the pole, expatiates that the derivation of formula of the upward continuation, vertical derivative in the frequency domain, provided the main reference map for the magnetic field sub-region division, faulted zone division , ore-body delineation.The above-mention method belong to this paper,which we used to the Nixiong skarn-type iron deposit, Tibet, combined with the region's ground magnetic data, summarized Nixiong skarn-type mineralization mode. According to this model, combined with reduction-to-the-pole, upward continuation,first vertical derivative maps, delineate nine prospecting targets outside Nixiong iron deposit ,In addition, the paper forecasts faulted zone.