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<p>Unmanned Aerial Vehicle (UAV) aeromagnetic surveying, as a modern geophysical exploration method, demonstrates significant advantages in addressing challenges of complex terrain investigations. This study evaluates the practical performance of the GTF-D24 UAV aeromagnetic system equipped with a domestically produced fluxgate sensor. The system features a high-precision triaxial fluxgate probe with high stability, low cost, and easy maintenance, achieving a total weight of 1,200 g and a magnetic measurement accuracy better than 5 nT. A low-altitude aeromagnetic survey at a scale of 1:10,000 was conducted in the Huililala area of Sichuan Province, China. By processing the acquired magnetic data through reduction-to-the-pole (RTP), 3D inversion, and detailed interpretation, five magnetic anomalies were delineated. Three major magnetic geological bodies were identified, correlating with the basic volcanic rocks in the Paleoproterozoic Hekou Group (the primary ore-hosting stratum in this region). The results reveal the extension of magnetic strata beneath non-magnetic overburden, providing critical guidance for deep-seated concealed ore exploration. This study validates the reliability of the domestic fluxgate-based UAV aeromagnetic system and its practical value for high-resolution geophysical exploration in complex geological settings.</p>

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Unmanned Aerial Vehicle (UAV) Aeromagnetic System Based on Fluxgate Sensor and Its Applications

  • 期刊论文

  • 发表日期：

    2025年10月15日

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  • Nan Zhang,
  • Li-zhong Xu,
  • Tian-hao An,
  • Jin-ge Zhang,
  • Hua Guo

摘要

Unmanned Aerial Vehicle (UAV) aeromagnetic surveying, as a modern geophysical exploration method, demonstrates significant advantages in addressing challenges of complex terrain investigations. This study evaluates the practical performance of the GTF-D24 UAV aeromagnetic system equipped with a domestically produced fluxgate sensor. The system features a high-precision triaxial fluxgate probe with high stability, low cost, and easy maintenance, achieving a total weight of 1,200 g and a magnetic measurement accuracy better than 5 nT. A low-altitude aeromagnetic survey at a scale of 1:10,000 was conducted in the Huililala area of Sichuan Province, China. By processing the acquired magnetic data through reduction-to-the-pole (RTP), 3D inversion, and detailed interpretation, five magnetic anomalies were delineated. Three major magnetic geological bodies were identified, correlating with the basic volcanic rocks in the Paleoproterozoic Hekou Group (the primary ore-hosting stratum in this region). The results reveal the extension of magnetic strata beneath non-magnetic overburden, providing critical guidance for deep-seated concealed ore exploration. This study validates the reliability of the domestic fluxgate-based UAV aeromagnetic system and its practical value for high-resolution geophysical exploration in complex geological settings.