Structural characteristics of the curved Königsee-Lammertal-Traunsee fault system in Salzkammergut (Northern Calcareous Alps, Austria).

Author(s): Nicola Levi, Lidia Pittarello, Mario Habermüller
Abstract: In the Miocene, the Eastern Alps (Austria) experienced strike-slip faulting, due to Eastward extrusion tectonics.
Sinistral movement along the Salzach-Ennstal-Mariazell-Puchberg fault, with transpressive and strike-slip tectonics, resulted into N–S and SW-NE compression in the Northern Calcareous Alps (NCA). That led to the
development of several faults, including the Konigsee-Lammertal-Traunsee ¨ (KLT): a sinistral fault cross-cutting
the NCA with a curved path. Here, we focus on the eastern termination of the KLT, previously interpreted as
two SSW-NNE and SW-NE strike-slip faults, connected by an E-W thrust with top-to-NE motion. Our structural/
petrographic data indicate that the two sectors of the KLT are linked also by an E-W strike-slip fault, between
Triassic carbonates and Late Cretaceous clastics. The associated damage zone is complex and includes strike-slip
duplexes and small-scale thrusts, associated to various fault rocks. Furthermore, our new data indicate that the EW oriented thrust is confined between two stepping strike-slip fault, suggesting a restraining bend, like other
sectors of the KLT.
The structure of the KLT, with the strike-slip segments characterized by small-scale duplexes and flowers, but
where significant shortening is mainly accommodated within the restraining area closely resembles that of other
strike-slip systems, which typically extended over hundreds of km.
Organisation(s): Department of Geology, Department of Lithospheric Research
Journal: Journal of Structural Geology
Volume: 155
No. of pages: 17
ISSN: 0191-8141
DOI: https://doi.org/10.1016/j.jsg.2021.104503
Publication date: 12-2021
Peer reviewed: Yes
Austrian Fields of Science 2012: 105124 Tectonics
Keywords
Portal url: https://ucrisportal.univie.ac.at/en/publications/276e29a0-87f6-4438-9261-416639b33332

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