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  Investigating the Eastern Alpine–Dinaric transition with teleseismic receiver functions: Evidence for subducted European crust

Mroczek, S., Tilmann, F., Pleuger, J., Yuan, X., Heit, B. (2023): Investigating the Eastern Alpine–Dinaric transition with teleseismic receiver functions: Evidence for subducted European crust. - Earth and Planetary Science Letters, 609, 118096.
https://doi.org/10.1016/j.epsl.2023.118096

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Mroczek, Stefan1, 2, Author              
Tilmann, Frederik1, 2, Author              
Pleuger, Jan2, 3, Author
Yuan, X.1, 2, Author              
Heit, B.1, 2, Author              
Affiliations:
12.4 Seismology, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_30023              
2Publikationen aller GIPP-unterstützten Projekte, Deutsches GeoForschungsZentrum, Potsdam, ou_44021              
3External Organizations, ou_persistent22              

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 Abstract: The tectonic structure of the Eastern Alps is heavily debated with successive geophysical studies that are unable to resolve areas of ambiguity (e.g., the presence of a switch in subduction polarity and differing crustal models). In order to better understand this area, we produce a high resolution Moho map of the Eastern Alps based on a dense seismic broadband array deployment. Moho depths were derived from joint analysis of receiver function images of direct conversions and multiple reflections for both the SV (radial) and SH (transverse) components, which enables us to map overlapping and inclined discontinuities. We observe the European Moho to be underlying the Adriatic Moho from the west up to the eastern edge of the Tauern Window. East of the Tauern Window, a sharp transition from underthrusting European to a flat and thinned crust associated with Pannonian extension tectonics occurs, which is underthrust by both European crust in the north and by Adriatic crust in the south. The Adriatic lithosphere underthrusts northward below the Southern Alps and becomes steeper and deeper towards the Dinarides where it dips towards the north-east. Our results suggest that the steep high velocity region in the mantle below the Eastern Alps, observed in tomographic studies, is likely to be of European origin.

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 Dates: 20232023
 Publication Status: Finally published
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 Identifiers: DOI: 10.1016/j.epsl.2023.118096
GFZPOF: p4 T3 Restless Earth
GFZPOFWEITERE: p4 MESI
OATYPE: Green Open Access
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Title: Earth and Planetary Science Letters
Source Genre: Journal, SCI, Scopus
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Pages: - Volume / Issue: 609 Sequence Number: 118096 Start / End Page: - Identifier: ISSN: 0012-821X
ISSN: 1385-013X
CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/journals99
Publisher: Elsevier