Preprints
https://doi.org/10.5194/se-2021-56
https://doi.org/10.5194/se-2021-56

  16 Jun 2021

16 Jun 2021

Review status: a revised version of this preprint is currently under review for the journal SE.

Two subduction-related heterogeneities beneath the Eastern Alps and the Bohemian Massif imaged by high-resolution P-wave tomography

Jaroslava Plomerová1, Helena Žlebčíková1, György Hetényi2, Luděk Vecsey1, Vladislav Babuška1,, and the AlpArray-EASI and AlpArray working groups Jaroslava Plomerová et al.
  • 1Institute of Geophysics, Czech Academy of Sciences, 141 31 Prague, Czech Republic
  • 2Institute of Earth Sciences, University of Lausanne, 1015 Lausanne, Switzerland
  • deceased
  • For the complete team list visit the link which appears at the end of the paper.

Abstract. We present high-resolution tomographic images of the upper mantle beneath the E. Alps and the adjacent Bohemian Massif (BM) in the North based on data from the AlpArray-EASI and AlpArray Seismic Networks. The tomography locates the Alpine high-velocity perturbations between the Periadriatic Lineament and the Northern Alpine Front. The northward-dipping lithosphere keel is imaged down to ~200–250 km depth, without signs of delamination, and we associate it with the Adriatic plate subduction. Detached high-velocity heterogeneity, sub-parallel to and distinct from the E. Alps heterogeneity is imaged at ~100–200 km depths beneath the southern part of the BM. We associate this heterogeneity with the western end of a SW-NE striking heterogeneity beneath the south-eastern part of the BM, imaged in models of larger extent. The strike, parallel with the Moldanubian/Brunovistulian mantle-lithosphere boundary in the BM and with the westernmost part of the Carpathian front, lead us to consider potential scenarios relating the heterogeneity to (1) a remnant of the delaminated European plate, (2) a piece of continental-and-oceanic lithosphere mixture related to the building of the BM, particularly to the closure of the old Rheic ocean during the MD/BV collision or (3) a lithospheric fragment going through to the NW between the E. Alps and W. Carpathians fronts in a preceding subduction phase. The study is dedicated to our outstanding and respected colleague Vladislav Babuška, who coined innovative views on the European lithosphere and died on March 30, 2021.

Jaroslava Plomerová et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on se-2021-56', Michael Behm, 08 Jul 2021
    • AC2: 'Reply on CC1', Jaroslava Plomerova, 10 Jul 2021
  • CC2: 'Comment on se-2021-56', Michael Behm, 08 Jul 2021
    • AC3: 'Reply on CC2', Jaroslava Plomerova, 10 Jul 2021
  • CC3: 'Comment on se-2021-56', Michael Behm, 08 Jul 2021
    • AC1: 'Reply on CC3', Jaroslava Plomerova, 10 Jul 2021
  • RC1: 'Comment on se-2021-56', M. R. Handy, 20 Jul 2021
    • AC4: 'Reply on RC1', Jaroslava Plomerova, 23 Sep 2021
  • RC2: 'Comment on se-2021-56', Anonymous Referee #2, 21 Jul 2021
    • AC5: 'Reply on RC2', Jaroslava Plomerova, 23 Sep 2021
  • EC1: 'Comment on se-2021-56', Emanuel Kästle, 30 Jul 2021
    • AC6: 'Reply on EC1', Jaroslava Plomerova, 23 Sep 2021

Jaroslava Plomerová et al.

Data sets

AASN AlpArray-EASI and AlpArray Working Groups https://doi.org/10.12686/alparray/z3_2015

AASN AlpArray-EASI and AlpArray Working Groups https://doi.org/10.12686/alparray/xt_2014

Jaroslava Plomerová et al.

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Short summary
High-resolution tomographic images of the upper mantle beneath the E. Alps and the adjacent Bohemian Massif (BM) in the North is presented. The northward-dipping E. Alps lithosphere keel is imaged down to ~200–250 km depth, without signs of delamination, and we associate it with the Adriatic plate subduction. Detached high-velocity heterogeneity, sub-parallel to and distinct from the E. Alps heterogeneity is imaged at ~100–200 km depths beneath the southern part of the BM.