Joint inversion method of aviation TEM and aviation MT

Abstract

The invention relates to a joint inversion method of aviation TEM and aviation MT. The method comprises the following steps of measuring the same area by simultaneously using the aviation TEM and theaviation MT, obtaining two sets of data of the aviation TEM and the aviation MT through two measurement methods, processing the two sets of data to respectively obtain an apparent resistivity profileand an apparent resistivity three-dimensional map of the aviation TEM, and a two-dimensional inversion apparent resistivity profile and an apparent resistivity three-dimensional map of the aviation MT, forming an initial model by taking the two-dimensional inversion apparent resistivity three-dimensional map of the aviation MT as a deep part and constraining a shallow part by the apparent resistivity data of the aviation TEM, performing the joint 3D inversion on the initial model to obtain three-dimensional joint inversion resistivity profiles of the aviation TEM and aviation MT, and finally analyzing a low-resistance anomaly region according to the three-dimensional joint inversion resistivity profiles of the aviation TEM and aviation MT and the geological data. The joint inversion methodcan simultaneously have a large detection depth and a high resolution, thereby obtaining accurate data and obtaining accurate analysis results.

Description

technical field [0001] The invention relates to an engineering geological survey technology, in particular to a joint inversion method of aerial TEM and aerial MT. Background technique [0002] The purpose of engineering survey is mostly to find out the shallow geological features. In order to find out the features of engineering geology and unfavorable geological bodies, the controllable source audio magnetotelluric method, audio frequency magnetotelluric measurement method (AMT) or magnetotelluric measurement method (MT) is usually used. . However, in complex alpine mountainous areas, due to the complex terrain, high cold and hypoxia, it is difficult to implement the above methods. It is difficult to collect high-quality electromagnetic data, and the measurement depth is relatively limited. It is difficult to achieve good results with conventional methods. Therefore, airborne electromagnetic surveys have been carried out, including airborne TEM and airborne MT methods. Th...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a joint inversion method of aerial TEM and aerial MT to solve the problem that the aerial TEM or aerial MT method alone cannot meet the needs of large measurement depth and high resolution.

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