Title: Drilling overdeepened (Eastern) Alpine Valleys and Basins Markus Fiebig1, Flavio Anselmetti2, Marius Büchi2, Gerald Gabriel3

Markus Fiebig1, Flavio Anselmetti2, Marius Büchi2, Gerald Gabriel3, Ernst Kroemer4, Frank Preusser5, Jürgen Reitner6, Sebastian Schaller2, Bennet Schuster2, David Tanner3, Ulrike Wielandt-Schuster7

1University of Natural Resources and Life Sciences, Austria; 2University of Berne, Switzerland; 3Leibnitz Institute for Applied Geophysics (LIAG), Germany; 4Bavarian Environment Agency, Germany; 5Albert-Ludwigs-Univeristy, Germany; 6Geological Survey of Austria; 7Regierungspräsidium Freiburg, Germany

Event: GeoKarlsruhe 2021

Date: 2021

DOI: 10.48380/dggv-ay5g-hw42

The panalpine project "DOVE" (Drilling Overdeepened Alpine Valleys), co-funded by the International Continental Scientific Drilling Program (ICDP), is drilling a series of overdeepened glacial troughs around the Alps that were formed by subglacial erosion during past glaciations.

In the northeastern section of the DOVE project, we (re)investigate the inneralpine basin of Bad Aussee (Traun glacier area, Austria), the subalpine basin of the Salzach Foreland glacier (Neusillersdorf, Bavaria), and the tongue basin area of the Pleistocene Isar-Loisach-Foreland glaciers (Schäftlarn). Depths of the inneralpine glacial erosion below Bad Aussee reach down to –400 m below sea level (the level of the Dead Sea in the Levant, the lowest part of today’s surface topography on Earth). 880 m of core material have been drilled into the basin and will be reinvestigated and physically dated by luminescence and cosmogenic isotopes.

In Neusillersdorf (Bavaria), we continue to study the basin infill of a branch basin of the Salzach Foreland glacier. We know from former dating attempts that sediments from the penultimate glaciation and older are available in the basin.

Finally, the sequence in former tongue basin area of the Isar Loisach Foreland glacier area, close to Munich, offers about 100 m of lake sediments, which are interpreted to contain sediments from Middle Pleistocene glaciations.

All available cores will be studied with state-of-the-art tools and methods in modern sedimentology and dating technics. Especially the combined investigation and interpretation of several drillholes will offer the opportunity to develop a modern reconstruction of past (Eastern) Alpine glacial environments.

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