Controlled source radiomagnetotellurics (CSRMT) is a new and innovative method of near surface geophysics. We applied this method for the detection of a buried fault beneath a test area close to St. Petersburg. During this survey, a rectangular current was injected into the ground using an electrical horizontal dipole with a length of 700 m and O.5, 11.5, 30 and 105 kHz -As well as their subharmonics - were used as main frequencies. The time series of two horizontal field components and three magnetic field components were observed at 97 stations with a station interval of 20 m in the near, the transition, and the far field zone of the electrical dipole. Transfer functions were derived in the frequency interval of 1 kHz to 1000 kHz from the observed electric and magnetic time series using the newly developed processing software. They showed a smooth dependence of frequency indicating the reliability of the observed CSRMT data. The CSRMT data were interpreted in the far field zone by using a 2D inversion algorithm and in the near zone by using 2D forward calculations. The derived 2D conductivity models showed clearly the location of buried faults as large resistivity contrasts.
Язык оригиналаанглийский
Название основной публикацииNear Surface Geoscience 4-8 September 2016, Barcelona, Spain
ИздательEuropean Association of Geoscientists and Engineers
ИзданиеEuropean Association of Geoscientists and Engineers, EAGE
DOI
СостояниеОпубликовано - 4 сен 2016
Событие22ND EUROPEAN MEETING OF ENVIRONMENTAL AND ENGINEERING GEOPHYSICS, NEAR SURFACE GEOSCIENCE 2016, 04-08 сентября 2016 г. - Barcelona, Испания
Продолжительность: 4 сен 20168 сен 2016
Номер конференции: 124666

конференция

конференция22ND EUROPEAN MEETING OF ENVIRONMENTAL AND ENGINEERING GEOPHYSICS, NEAR SURFACE GEOSCIENCE 2016, 04-08 сентября 2016 г.
Страна/TерриторияИспания
ГородBarcelona
Период4/09/168/09/16

    Предметные области Scopus

  • Геофизика

ID: 7592831