In the coupled electric interaction of rock fractures and gas invasion, that is, when gases interact with newly created crack surfaces, the unpaired electrons within the rock crystal defects are thermally stimulated, released into the crack due to the temperature rise at the crack tip via plastic work, and attached to ambient gas molecules to electrify them in a negative state. Using a working hypothesis that this mechanism is the source mechanism of seismo-electromagnetic phenomena, we conducted laboratory experiments in which rocks were fractured with pressurized N₂, CO₂, CH₄, and hot water vapour. Fractures were induced by a flat-ended indenter equipped with a flow channel, which was loaded against blocks of quartz diorite, gabbro, basalt, and granite. Fracture-induced negatively electrified gas currents at ~ 25 °C and ~ 160 °C were successfully measured for ~ ≥ 100 μs after full development of the crack. The peak electric currents were as high as 0.05–3 μA, depending on the rock species and interaction area of fractured rock and gas and to a lesser extent on the gas species and temperature. The peak current from fracturing granite, which showed higher γ-ray activity, was at least 10 times higher than that from fracturing gabbro, quartz diorite, and basalt. The results supported the validity of the present working hypothesis, that coupled interaction of fracturing rock with deep Earth gases during quasi-static rupture of rocks in the focal zone of a fault might play an important role in the generation of pre- and co-seismic electromagnetic phenomena.

在岩石破裂和气体入侵的电耦合作用中，即当气体与新产生的裂缝表面相互作用时，岩石晶体缺陷中未成对的电子受到热刺激，由于裂纹尖端处的温度升高而释放到裂缝中。塑性工作，并附着在周围的气体分子上使它们带负电。使用一种可能的机制，即该机制是地震电磁现象的源机制，我们进行了实验室实验，在该实验中，岩石被加压的N ₂，CO ₂，CH ₄压裂和热水蒸气。配备有流道的平头压头会引起断裂，该压头加载在石英闪长岩，辉长岩，玄武岩和花岗岩块上。裂纹完全发展后，在〜≥100μs的情况下，成功地测量了在〜25°C和〜160°C下由断裂引起的负带电气体流。峰值电流高达0.05–3μA，这取决于岩石种类和压裂岩石与气体的相互作用区域，而在较小程度上取决于气体种类和温度。压裂花岗岩的峰值电流显示出更高的γ射线活性，它比裂隙辉长岩，石英闪长岩和玄武岩的峰值电流至少高10倍。结果支持当前工作假设的有效性，