EXPERIMENTAL STUDY OF THE HALL EFFECT IN THE EARTH AT THE CONTROLLED SOURCE TRANSIENT ELECTROMAGNETIC METHOD

• Main Authors: Vladimir S. Mogilatov, Vladimir V. Potapov, Aleksandr K. Zaharkin, Vladimir A. Gurev, Aleksandr N. Shein
• Format: Article
• Language: Russian
• Published: Tomsk Polytechnic University 2020-04-01
• Series: Известия Томского политехнического университета: Инжиниринг георесурсов
• Subjects: electrical exploration; controlled source transient electromagnetic (tem) method; geomagnetic field; hall effect; lorentz effect
• Online Access: http://izvestiya.tpu.ru/archive/article/view/2608/2214

In the period from 8 to 15 July 2018, the employees of the Laboratory of Geoelectricity of Trofimuk Institute of Petroleum Geology and Geophysics SB RAS conducted field studies under the RFBR grant no. 17-05-00083 A. This effect should be very weak in all signals of controlled source transient electromagnetic method. The studies were carried out by the following electric prospecting methods: complex of electrical prospecting methods was chosen due to the methodical efficiency and relative simplicity of the work.Research problems: work area selection; measurement of transient electromagnetic signals byfour radial MN linesfor registration of components,caused by the Hall effect; measurement of components for measurements control. The relevance of the researchis primarilycaused by the fact that the galvanomagnetic effects (including the Hall effect), arising in crossed electric and magnetic fields, are well known in physics, but have not been studied in relation to the geological environment – this means that these effects are not yet accounted for affect the signals of geoelectromagnetic soundings. The main aimof the research is todiscover the Hall effect in the geological media. Object: the Hall effect in the geological media. Methods: controlled source transient electromagnetic method, magnetotelluric sounding method. Results. The field studies in 2018 are the first purposeful field studies to detect the Hall effect in the geological environment by electromagnetic sensing methods. In researchers opinion, the goal of research, according to preliminary data, was achieved. The Hall conductivity was estimated at~1–2·10–3S/m.