Technology Research In Magnetic Anomaly Processing And Information Extraction

As the foremost method used in geophysical exploration, magnetic exploration is widely used for its low-cost, high efficiency, simple operation and less restrictions on working conditions in various stages of geological survey. For developing more than one century, magnetic exploration plays an important role in different types of magnetite bed investigation and archaeological survey.Large-scale and even the global high-quality magnetic anomaly data has been gotten with high-precision ground magnetic survey work carried out. It has become an important aspect in geophysical research to use magnetic anomaly data to study the crustal magnetic anomalies structure for prospecting, seismic region partition and the Earth's magnetic field research. It becomes an extremely important task to operate the measured data, in-depth and accurate processing. It directly affects the reliability and objectivity of explanation. This paper is studying the contents of the magnetic anomaly processing and extraction. Highlight or extract useful information were obtained by using magnetic anomaly differential coefficient, Frequency filtering and wavelet transform which can restrain even eliminate random interference or separate stacking anomalies. The advantage and disadvantage of the selected methods were summed up to achieve effective processing and separation to different types stacking anomalies.Based on existing researched results at home and abroad and the knowledge of magnetic exploration, numerical calculation and signal processing, the better Methods to separate and extract magnetic anomalies were choosen by comparating study on the magnetic anomaly extraction technologys.