Research Of The Gravity And Magnetic Characteristics Based On The Metallogenic Model Of Lingshan Plutons In Jiangxi

Lingshan granite in Shangrao is located in southeast of the fracture in northeastern Jiangxi, belonging to the annular composite granitic plutons. The plutons has experienced four important geo-history stages, where there are a number of intrusive rocks and mineral resources. This paper relies on mineral resources survey project in Jiangxi and the 1:50000 high-precision ground magnetic survey of Lingshan area.The author analyzes the correlation between the mineralization condition and magnetic anomalies, verifying the aeromagnetic anomaly.This paper has counted the magnetic susceptibility of 1300 rocks and ores in Lingshan. The distributed regularity, magnetic characteristics of Lingshan plutons and other all kinds of lithology have been studied. It turned out that the magnetic susceptibility characteristics of granite in different areas and different periods are different. Study of magnetic susceptibility of rocks and minerals enriches the physical properties of materials in the region and provide the reliable basis for the interpretation of magnetic anomaly.On the basis of a large number of collection and access to relevant geological data and results of previous studies about Lingshan region, combined with ground magnetic anomalies, are the geological conditions, metallogenic characteristics and regularities of distribution verified reciprocally. The intrinsic relationship between ore-controlling structures, metallogenic characteristics and the formation of magnetic anomalies have been analyzed. Magnetic anomalies are processed and converted with method of reduction to the pole, analytic continuation, derivative calculation, which highlights the useful information about the exception better. In order to improve the depth of the magnetic geologic body, matched filtering is used to separate the regional and local field of the magnetic anomalies, as well as the wavelet multiscale decomposition.Compared with the known geological data, these anomaly information reflects the geological structure of the magnetic body, which indicates the existing credibility of the magnetic anomaly.In inversion interpretation of magnetic anomaly, it has achieved better inversion results to use the Hilbert transform inversion and 2.5D inversion of human-computer interaction by calculating a large number of models.Finally, the magnetic anomalies in the area and the formation mechanism have been studied. According to magnetic anomalies, the author has predicted the metallogenic prospective of the Lingshan pluton peripherals.