Constraints on the deep structure of the Pyrenees from new magnetotelluric data

  1. J. Pous 1
  2. J. J. Ledo 1
  3. P. Queralt 1
  4. J. A. Muñoz 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: 395-400

Type: Article

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Abstract

Magnetotelluric data registered along a N-S profile in the central Pyrenees as well as along-strike indicate the existence of very high conductive zones at lower crustal and mantle depths. This deep conductor is interpreted as partial melted lberian subducted lower crust. lt is present all along the Axial Zone. Westwards the western termination of the Axial Zone it seems to disappear. This has been interpreted as a smaller volume of subducted lower crust as a result of the westwards decrease of orogenic contraction accompanied by an increasing of the Mesozoic extensional thinning.

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