Mágneses fázisátalakulás és a magnetotellurika

János Kiss, Ernö Prácser, L. Szarka, A. Ádám

Research output: Article

3 Citations (Scopus)

Abstract

In an earlier paper we suggested a possible additional source of geomagnetic and crustal conductivity anomalies: the socalled second-order magnetic phase transition in the Earth's crust, namely a significant enhancement of the magnetic susceptibility near the Curie (Néel) depth. Some geomagnetic anomalies of unknown origin can be easily explained by this phenomenon. In this paper we summarize the one- and two-dimensional magnetotelluric signatures due to a thin but very high-permeability body at mid-crustal depths. The magnitude of the anomaly due to a high-permeability layer is comparable to that due to a high-conductivity layer, with opposite sign. Wherever the classical magnetotelluric interpretation produces an unrealistic high-resistivity and extremely thick layer, and the nearby geomagnetic anomalies have a spatial wavelength indicating the same depth as the depth of the high resistivity layer, the second-order magnetic phase transition might be also considered as a possible explanation. Although it has been still questionable whether this phenomenon exists in the Earth's crust, some recent solid state physics laboratory results make it more and more probable that the magnetic phase transition might be a potential source of various geophysical crustal anomalies.

Original languageHungarian
Pages (from-to)73-87
Number of pages15
JournalMagyar Geofizika
Volume51
Issue number2
Publication statusPublished - 2010

Fingerprint

phase transition
anomaly
Earth crust
magnetic anomalies
anomalies
permeability
electrical resistivity
conductivity
solid state physics
magnetic susceptibility
signatures
magnetic permeability
physics
augmentation
wavelength
wavelengths
earth's crust

ASJC Scopus subject areas

  • Geology
  • Geophysics

Cite this

Mágneses fázisátalakulás és a magnetotellurika. / Kiss, János; Prácser, Ernö; Szarka, L.; Ádám, A.

In: Magyar Geofizika, Vol. 51, No. 2, 2010, p. 73-87.

Research output: Article

Kiss, János ; Prácser, Ernö ; Szarka, L. ; Ádám, A. / Mágneses fázisátalakulás és a magnetotellurika. In: Magyar Geofizika. 2010 ; Vol. 51, No. 2. pp. 73-87.
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