###### Abstract
Only [PERSON] (2014) has conducted simple research on the application of infinite elements in CSAMT [16]. Therefore, conducting research on the geophysical model of the Jinding lead-zinc mining area with the coupled finite element-infinite element method has important guiding significance for the selection of geophysical exploration methods. In traditional CSAMT field surveys, due to the complexity of electromagnetic theory and a lack of technical training, most operators can only follow the equipment manufacturer's manual for fieldwork and data processing. Hence, a major challenge is the lack of effective quality control and evaluation of CSAMT data. For example, operators often focus on transmitter signal strength alone and neglect the quantitative evaluation of receiver signal strength. On the other hand, to improve efficiency, single-cycle data acquisition is commonly used, so the importance of time stacking for enhancing low-frequencydata quality is often overlooked, leading to unclear or incorrect near-field characteristics in resistivity sounding curves. These practices significantly reduce the effectiveness of CSAMT exploration. Therefore, in this study, the exploration of the Jinding lead-zinc mine was taken as an example. Firstly, based on existing geological survey results, geological models, and resistivity measurements of rocks in the mining area, research was conducted to construct a 3D geophysical model of the Jinding lead-zinc mine. Then, 3D forward modeling based on the finite element-infinite element method was used to numerically simulate the constructed geophysical model in order to verify the effectiveness of the CSAMT exploration method in the Jinding lead-zinc mine. Meanwhile, an optimal technical scheme for the CSAMT exploration of the mine was rationally designed based on the forward numerical simulation scheme. Secondly, field exploration using CSAMT was carried out in the Jinding mine to validate the field application's effectiveness. Through noise testing experiments and acquisition time trials, optimal transmission intensity and acquisition time parameters were determined, significantly improving the quality of CSAMT field data acquisition. A new method for calculating the signal-to-noise ratio (SNR) using the electromagnetic background signals in the mining area as the noise source was proposed to quantitatively evaluate the quality of data acquisition. Additionally, methods for qualitatively evaluating data quality based on the transition zone and near-zone characteristics of the CSAMT Cagniard resistivity sounding curves were proposed. Finally, the data obtained from the field exploration were inverted using a continuous medium inversion method to derive the 2D electrical structure characteristics of the deep part of the Jinding deposit, which were then interpreted. This provides rigorous geophysical evidence for the in-depth exploration of the deep metallogenic geological background and environment of the Jinding lead-zinc deposit. The entire set of CSAMT geophysical exploration technical schemes mentioned above can provide geophysical exploration models, directions, and ore-finding ideas for mineral resource exploration in the Jinding and similar deposits.