Three-dimensional gravitational and magnetic-data acquisition and analysis via a joint-gradient Eulerdeconvolution method*
Ma Guo-Qing 1, Yong Xiao-Yu 1, Li Li-Li 1, and Guo Hua 2
1. College of Geoexploration Science and Technology, Jilin University, Changchun 130021, China.
2. China Aero Geophysical Survey and Remote Sensing center for Land and Resources, Beijing 100083, China.
Abstract：
Three-dimensional (3D) gravitational and magnetic exploration is performed using aerial measurement tools, however, this has difficulties with measuring-height design and the construction of a joint-interpretation scheme. At present, the height in such experiments is set according to the measurement scale, and the distribution characteristics of anomalies are not fully considered. Here, we present the idea of using the attenuation characteristics of a singular-value spectrum to evaluate the contributions of various measurement heights and multi-height combinations for inversion to correctly and reasonably design appropriate measuring heights and the number of various measurement heights to be set. The jointgradient Euler-deconvolution method can accurately obtain the distribution of geological bodies from 3D gravitational and magnetic data at an improved resolution, and experimental tests confirm these findings. Therefore, an actual 3D aeromagnetic-data-acquisition and inversion test were carried out in the vicinity of the Zhurihe Iron Mine in Inner Mongolia. The flight-height difference was set to 60 m, and the specific distribution of lodes was obtained by the joint-gradient Euler-deconvolution method. This provides a reliable basis for future detailed exploration and proves that the methods presented in this paper have good practicalapplication effects and prospects.
. Three-dimensional gravitational and magnetic-data acquisition and analysis via a joint-gradient Eulerdeconvolution method*[J]. APPLIED GEOPHYSICS, 2020, 17(2): 297-305.
2020, Vol. 17 
