the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Slab Break-offs in the Alpine Subduction Zone
Abstract. After the onset of plate collision in the Alps, tectonic processes are inferred to have changed dramatically in the Alps: European plate break-offs in various places of the Alpine arc, as well as a subduction polarity reversal in the eastern Alps have been proposed. We review body-wave tomographic studies, compare them to our surface-wave-derived model, and interpret them in terms of slab geometries. We infer that the shallow subducting portion of the European plate is likely detached under both the western and eastern (but not the central) Alps. The Alps-Dinarides transition may be explained by a combination of European and Adriatic subduction. This implies that the deep high-velocity anomaly (> 200 km depth) mapped by tomographers under the eastern Alps is a detached segment of the European plate. The shallower fast anomaly (100–200 km depth) can be ascribed to European or Adriatic subduction, or both. These findings are compared to previously proposed models for the eastern Alps in terms of slab geometry, but also integrated in a a new, alternative geodynamic scenario that best fits both tomographic images and geological constraints.
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RC1: 'Review of the manuscript by Kästle et al.', Marco Giovanni Malusa', 08 Mar 2019
- AC1: 'Response to reviewer's comments', Emanuel Kästle, 17 Apr 2019
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RC2: 'Review of the manuscript "Slab Break-offs in the Alpine Subduction Zone" by Kastle et al.', Claudia Piromallo, 28 Mar 2019
- AC2: 'Response to reviewer's comments', Emanuel Kästle, 17 Apr 2019
-
RC1: 'Review of the manuscript by Kästle et al.', Marco Giovanni Malusa', 08 Mar 2019
- AC1: 'Response to reviewer's comments', Emanuel Kästle, 17 Apr 2019
-
RC2: 'Review of the manuscript "Slab Break-offs in the Alpine Subduction Zone" by Kastle et al.', Claudia Piromallo, 28 Mar 2019
- AC2: 'Response to reviewer's comments', Emanuel Kästle, 17 Apr 2019
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Cited
3 citations as recorded by crossref.
- Density distribution across the Alpine lithosphere constrained by 3-D gravity modelling and relation to seismicity and deformation C. Spooner et al. 10.5194/se-10-2073-2019
- Seismotectonics at the Transition Between Opposite‐Dipping Slabs (Western Alpine Region) E. Eva et al. 10.1029/2020TC006086
- Crustal structures beneath the Eastern and Southern Alps from ambient noise tomography E. Qorbani et al. 10.5194/se-11-1947-2020