Role of Hall Effect in Magnetotelluric Sounding
Many minerals belong to the semiconductor class from the point of view of the mechanism of electrical conductivity. One of the experimental methods for determining the electrical conductivity of semiconductor minerals is based on the Hall effect. Due to the presence of the Earth’s magnetic field it is possible to expect the manifestation of this effect in natural conditions during electromagnetic soundings. To detect manifestations of the Hall effect during magnetotelluric (MT) sounding, a polarization analysis method is proposed, based on a data processing algorithm that divides the time spectrum of the MT field into normal mode spectra with right and left circular polarization. Numerical estimates and results of a special field experiment are presented.
KeywordsMagnetotelluric sounding Hall effect Normal modes Right and left circular polarizations
This work was executed with a financial support of Russian Foundation for Basic Research, grant 17-05-00083.
- 1.Gololobov, D.V., Malevich, I.Yu.: Physical and electrochemical processes in the environment above the carbon-hydrogen deposit. Doklady BGUIR (1), 22–27 (2005) (in Russian with English abstract)Google Scholar
- 2.Mogilatov, V.S.: Influence of geomagnetic field on the transient process of the secondary currents in the Earth. Geofizika (4), 70–75 (2013) (in Russian with English abstract)Google Scholar
- 3.Plotkin, V.V.: Technique of contribution definition of the Hall’s effect by magnetotelluric sounding. In: XIII International Scientific Congress and GEO-SIBIR-2017 INTEREKSPO Exhibition. International Scientific Subsurface Use Conference. Mining. New Directions and Technologies of Search, Investigation and Development of Mineral Deposits. Geoecology. Collection of Materials, vol. 2, no. 3, pp. 187–192. Novosibirsk (2017) (in Russian)Google Scholar
- 4.Aleksandrov, P.N.: The forward problem of geoelectrics in a one-dimensional bianisotropic medium. Izv. Phys. Solid Earth 37(4), 324–333 (2001)Google Scholar