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Field work of the Magnetotelluric Research Group (DMTS)

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In the period from July 13 to July 24 2021 the MTS group consisted of 4 teams carried out detailed works on the profile "Boom", located near the Zholbulak village of, Kemin raion. Three teams conducted magnetotelluric sounding (MTS) on 16 points of the profile, where the duration of registration of MT field in MTS mode at each observation point was 16-20 hours and on one observation point in DMTS mode, duration of observations was 180 hours. The work was carried out by means of Phoenix MTU-5 and MTU-5A measuring complexes in the standard registration mode. The beginning of work was preceded by calibrations of recorders and sensors of MT stations. At all observation points, a control recording of at least 40 minutes was preceded by a check recording to assess the level of interference and adjust the parameters of the working recording. The electric components of MT field were measured using measuring units with electric dipoles 50 m long. The magnetic field components were measured using MTS-50 induction sensors. At all sounding points, grounding of dipoles was performed using non-polarizing electrodes, at 9 observation points including the DMTS point, grounding of dipoles was performed according to the "sensor to sensor" principle with the previous observations conducted in 2020. The orientations of measuring units at these points completely repeated the previous deployments. Installation of eight new MTS points was carried out between the observation points previously worked out in 2020, ensuring an equal distance to neighboring points, taking into account the terrain relief.

Boom 4 Монтажная область 1


Team №4 carried out work on the Boom profile using electrotomography and induced polarization methods using the Skala 48 multielectrode station. Registration of data on the profile was performed by two types of unit: "Schlumberger" and "Wenner". Operation of the station was performed using two multielectrode cables, the length of each connecting cable is 120 meters, installation of electrodes was carried out with a step of 5 meters, the total number of electrodes when deploying two connecting cables is 48 pieces. The length of the work area was 3555 meters, registration was carried out in 29 basic observation points. Upon completion of the main works on the profile, in the area of points FT9 (DMTS) - FT8 (MTS), a trial 24-hour monitoring was carried out in number of 36 registrations, duration of each 42-44 minutes by electrotomography and induced polarization methods, Schlumberger installation type.

 

Photogallery

Geographic location

40 km. from Bishkek