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<p>Self-potential (SP) inversion is an effective geophysical technique for metal mineral exploration. Traditional deep learning-based inversion methods are prone to overfitting and may fail to produce reliable results in scenarios with limited samples. To address this challenge, a two-dimensional convolutional neural network (2DCNN)-based transfer learning (TL) framework TL-2DCNN is proposed to interpret SP anomalies as regular polarized bodies. We evaluate its capability using synthetic data and conduct comparative analyses with other deep learning methods. To further test the efficacy of the TL-2DCNN in complex conditions, limited-sample experimental data are used for transfer network training. The inversion results of two test datasets illustrate that the TL-2DCNN can deliver reliable parameter estimations even when pre-training datasets are derived from regular polarized bodies, confirming the feasibility of the transfer training strategy. Overall, the superior performance of the TL-2DCNN framework establishes it an effective tool for SP inversion under sample-limited conditions in practical exploration.</p>

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CNN-based transfer learning for self-potential inversion

  • 期刊论文

  • 发表日期：

    2025年6月23日

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  • Yian Cui,
  • Xiangbo Yang,
  • Hao Li,
  • Pu Wang,
  • Jing Xie,
  • Jianxin Liu

摘要

Self-potential (SP) inversion is an effective geophysical technique for metal mineral exploration. Traditional deep learning-based inversion methods are prone to overfitting and may fail to produce reliable results in scenarios with limited samples. To address this challenge, a two-dimensional convolutional neural network (2DCNN)-based transfer learning (TL) framework TL-2DCNN is proposed to interpret SP anomalies as regular polarized bodies. We evaluate its capability using synthetic data and conduct comparative analyses with other deep learning methods. To further test the efficacy of the TL-2DCNN in complex conditions, limited-sample experimental data are used for transfer network training. The inversion results of two test datasets illustrate that the TL-2DCNN can deliver reliable parameter estimations even when pre-training datasets are derived from regular polarized bodies, confirming the feasibility of the transfer training strategy. Overall, the superior performance of the TL-2DCNN framework establishes it an effective tool for SP inversion under sample-limited conditions in practical exploration.