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天然低频电场法是利用雷电场和游散电流场作为场源,以岩矿石电阻率差异为基础,在地面沿特定的剖面测量大地电场的水平分量,并通过对其变化规律的研究,用来解决水文,工程地质和找矿勘探等地质任务。此法不需要人工供电,可省去笨重的供电设备,因此方法简单,轻便,经济,效率高、适合于快速普查和评价航磁和航电异常。 本方法类似于音频大地电流法,所不同的我们采用的工作频率几周至2K周,野外工作中只测量单方向的大地电场的水平分量,在场源上除了利用天然电磁场变化在大地中感应的大地电流之外,还利用了工业游散电流场,为了使方法名称更符合实际,故将
The natural low-frequency electric field method uses the lightning field and the dissipative current field as the field sources, and based on the difference of resistivity of the rock and ore, measures the horizontal component of the electric field along a specific section on the ground and studies the variation law of the electric field to Solve hydrological, engineering geology and prospecting and other geological tasks. This method does not require manual power supply, eliminating bulky power supply equipment, so the method is simple, lightweight, economical and efficient, suitable for rapid census and evaluation of aeromagnetic and avionics anomalies. This method is similar to the audio earth current method, the different we use the operating frequency of a few weeks to 2K weeks, the field work only to measure the horizontal component of the earth direction in one direction, in addition to the field source using natural electromagnetic field induced in the earth In addition to the earth current, it also makes use of the industrial tour scattered current field. In order to make the method name more realistic,