Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/1408
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dc.contributor.authorallSvetov, B. S.; Geoelectromagnetic Research Institute, Institute of Physics of the Earth, RAS, Moscow, Russiaen
dc.contributor.authorallAgeev, V. V.; Geoelectromagnetic Research Institute, Institute of Physics of the Earth, RAS, Moscow, Russiaen
dc.date.accessioned2006-07-26T12:51:40Zen
dc.date.available2006-07-26T12:51:40Zen
dc.date.issued1999-08en
dc.identifier.urihttp://hdl.handle.net/2122/1408en
dc.description.abstractThe influence of frequency dispersion of conductivity (induced polarization) of rocks on the results of electromagnetic (EM) sounding was studied on the basis of calculation of electric field of vertical magnetic dipole above horizontally layered polarizable sections. Frequency dispersion was approximated by the Debye formula. Polarizable homogeneous halfspace, two, three and multilayered sections were analyzed in frequency and time domains. The calculations for different values of chargeability and time constants of polarization were performed. In the far zone of a source, the IP of rocks led to quasi-wave phenomena. They produced rapid fluctuations of frequency and transient sounding curves (interference phenomena, multireflections in polarizable layers). In the case of transient sounding in the near zone of a source quasistatic distortions prevailed, caused by the counter electromotive force arising in polarizable layers which may lead to strong changes in transient curves. In some cases quasiwave and quasistatic phenomena made EM sounding curves non-interpretable in the class of quasistationary curves over non-dispersive sections. On the other hand, they could increase the resolution and depth of investigation of EM sounding. This was confirmed by an experience of "high-resolution" electroprospecting in Russia. The problem of interpretation of EM sounding data in polarizable sections is nonunique. To achieve uniqueness it is probably necessary to complement them by soundings of other type.en
dc.format.extent4439329 bytesen
dc.format.mimetypeapplication/pdfen
dc.language.isoEnglishen
dc.relation.ispartofseries4/42 (1999)en
dc.subjectelectromagnetic soundingen
dc.subjectinduced polarizationen
dc.subjectfrequency dispersion of conductivityen
dc.subjectresolution of soundingen
dc.subjectmathematical modellingen
dc.titleHigh resolution electromagnetic methods and low frequency dispersion of rock conductivityen
dc.typearticleen
dc.type.QualityControlPeer-revieweden
dc.subject.INGV04. Solid Earth::04.02. Exploration geophysics::04.02.04. Magnetic and electrical methodsen
dc.description.journalTypeJCR Journalen
dc.description.fulltextopenen
dc.contributor.authorSvetov, B. S.en
dc.contributor.authorAgeev, V. V.en
dc.contributor.departmentGeoelectromagnetic Research Institute, Institute of Physics of the Earth, RAS, Moscow, Russiaen
dc.contributor.departmentGeoelectromagnetic Research Institute, Institute of Physics of the Earth, RAS, Moscow, Russiaen
item.cerifentitytypePublications-
item.grantfulltextopen-
item.openairetypearticle-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
item.languageiso639-1en-
crisitem.classification.parent04. Solid Earth-
crisitem.author.deptGeoelectromagnetic Research Institute, Institute of Physics of the Earth, RAS, Moscow, Russia-
crisitem.author.deptGeoelectromagnetic Research Institute, Institute of Physics of the Earth, RAS, Moscow, Russia-
Appears in Collections:Annals of Geophysics
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