Electrical conductive structure of the central Betics from magnetotelluric data

  1. J. Pous 1
  2. P. Queralt 1
  3. J. J. Ledo 1
  4. E. Roca 1
  5. X. García 1
  6. A. Marcuello 1
  1. 1 Universitat de Barcelona
    info

    Universitat de Barcelona

    Barcelona, España

    ROR https://ror.org/021018s57

Journal:
Revista de la Sociedad Geológica de España

ISSN: 0214-2708

Year of publication: 1995

Volume: 8

Issue: 4

Pages: 513-517

Type: Article

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Abstract

A magnetotelluric survey was carried out in the central part of the Betic range. We present the interpretation along a NW-SE profile across the chain. The periods recorded range from 0.0128 s to approximately 2000 s. Analysis of the data indicates that the electrical structure along this profile is roughly two-dimensional striking NE-SW. Accordingly, a two-dimensional resistivity cross-section along the profile was obtained by two-dimensional inversion. The most striking results are: (1) detection of shallow conductors, one of which is associated with the base of the External Betics; (2) the middle and lower crust in the Internal Betics are more conductive than those beneath the External Betics; (3) detection of a very high conductive zone at lower crustal and upper mantle depths beneath the Sierra de los Filabres.

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