Application Of Low-altitude Magnetic Measurement System Of Power Glider In The Peripheral Area Of Duobaoshan

Geophysical aeronautical magnetic measurements began in the 1940 s and 1950 s,Different from the traditional ground magnetic measurement,aeromagnetic survey greatly improves the measurement efficiency,guarantees the integrity of the survey data,and has a significant effect on large-scale geological prospecting.The power glider equipped with the aeromagnetic data acquisition system is simple,light,efficient,adaptable to the environment,and the slower flight speed guarantees a higher resolution.Magnetic measurement in the peripheral areas of Duobaoshan,the selection of dynamic glider low-altitude magnetic measurement system mainly considers two factors,one of which is to weaken the geographical location,ecological environment and human factors in the periphery of Duobaoshan,The second is that there are obvious differences in the magnetic properties of rock ore in the outer area of Duobaoshan.The use of magnetic exploration can well represent the difference of different rock ore in the work area and achieve the purpose of assisting prospecting.In this paper,the low-altitude magnetic measurement system of the power glider is used as the technical means to process and analyze the aeromagnetic data with the scale of 1:10000 in the two working areas outside the Duobaoshan,combined with the local geological and mineral resources,the distribution of fault structures in the two work areas is inferred and the target areas for possible mineralization are delineated:(1)The composition of the low-altitude magnetic measurement system of the power glider,the working principle,the actual operation process in the field and the requirements of data quality evaluation are introduced in detail.And with the help of the previous magnetic data,the reliability of the system is guaranteed.(2)In order to separate the field source,the extension separation,interpolation cutting and matching filtering method are adopted,and the separation result is combined with the vertical gradient and the amplitude of the analytical signal to define the distribution range of the geological body in the two work areas.Integrated vertical gradient,horizontal derivative method,tilt derivative,the inclination angle of the total horizontal derivative,the normalized standard deviation method,the results Thate map method and parsing the signal amplitude method common to the field source border delineation and estimation faults.(3)Combining the aeromagnetic data processing results of the two work areas,according to the geological data of the work area,the structural boundaries and faults are divided,and a total of three possible metallogenic target areas are preliminarily delineated.