| High precision magnetic prospecting ore plays an important role in the search for concealed underground iron. It is also widely used prospecting method of iron. High accuracy magnetic prospecting on the ground is produced according to all kinds of rocks and ores in the nature of different magnetic field of magnetic anomaly to indirectly infer that a method of mineral resources. With the development of science and technology, more and more advanced magnetic measurement instrument emerged. The more accurate data was collected by using this method. The ground high-precision magnetic prospecting in the field of geological prospecting will play a great role.In this paper, the author consulted a large number of literature research of the calculation of magnetic firstly. And then in order to solve the uncertainty of geophysical data processing, the author also used the method of potential field transformation to highlight the useful information. Then in order to better judge the geological body shape size, space location and so on, the author also made a common sphere, plate of positive and inverse model of geological body magnetic anomaly contrast research. Finally we took a Fe polymetallic ore as a research area, did 1:10 000 high-precision magnetic survey, and studied and analyzed the magnetic characteristics of it thoroughly. We used high precision magnetic survey to determined three identified magnetic anomaly. we set up a magnetic survey precision profile line in the main and most promising magnetic anomaly to determine the nature of the anomaly and the cross section characteristics of field source body.By using high precision magnetic exploration method to determine the magnetic anomaly in the study area and used a variety of data processing methods realized the interference suppressing, enhancing the signal-to-noise ratio of the measured data. It highlighted the magnetic anomaly information to reflect the characteristics of the geological structure and deposits and improved the reliability of magnetic anomaly interpretation. The author used many method of potential transformation such as the numerical integral method, the direct solution of lars equation method and the equivalent source method and finally found the most effective method. Combined with the data which was processed by using pole and analytical continuation and geological data. We delineated 3 area of anomaly and concluded 2 fracture of northeast and 3 fracture of nearly southeast.After fully studied the characteristics of the magnetic field, and combined with geological data, we achieved the results as follows:1. The curve of profile is not smooth of magnetic anomaly in the area. Flat contour line changed complexly. It indicate the inequality of magnet mineralization. In addition, the strong magnetic anomaly could probably be observed on the magnetic iron ore.2. We have delineated 3 magnetic anomaly(numbered: M1,M2,M3). The anomaly of M1 was closed, and the scope and the value are large. The scope and value of anomaly of M2 are large, but the distribution of anomaly is not even. The scope and value of anomaly of M2 are very small. The magnetic anomaly whole distributed as belt and block state. M1 anomaly area has found ? ore through the pit exposing. M2 anomaly area has found ? ore. M3 is a promising anomaly area.3. The author had concluded 2 fracture of northeast, namely F1 and F2, and 3 fracture of near southeast which are called F3, F4 and F5. |
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