Geophysical Study And Structural Modelling Of
A Mass Movement In Upper Austria
Author(s)
M. G. Schreilechner, C. G. Eichkitz & J. Amtmann
Abstract
In this paper, a typical workflow for the generation of a three dimensional
structural model of a mass movement is presented. For the demonstration of this
workflow, the mass movement of the Gschliefgraben (Upper Austria) is used as
a case study. The Gschliefgraben is situated on the eastern shore of Lake
Traunsee, Upper Austria, on the transition of the Northern Calcareous Alps and
the Flysch Zone. This mass movement shows various phases of activity since the
last glacial period (Würm), with the last huge landslide in November 2007. This
landslide is built up as an earthflow system with occasional mudflows and can be
cross-bedded with debris flows and torrential sediments. Due to the continuous
accumulation of unconsolidated sediments, subaqueous earth slides in the area of
the Gschliefgraben can be observed. Multiple seismic reflection and refraction
profiles were measured before and after the last huge landslide. In addition, there
are numerous wells and several digital elevation models were recorded too. The
seismic reflection profiles were interpreted using a seismic stratigraphic
approach. These interpretations in combination with information from the
refraction profiles, the wells and the digital elevation models were used to
generate a high resolution three-dimensional structural model. The focus of this
modelling process was on the western part of the mass movement (base of the
mass movement). With the help of the interpretation and the three dimensional
model, three phases of mass movements prior to the most recent one can be
distinguished.
Keywords: mass movement, debris flow, geophysics, seismic reflection, seismic
refraction, upper Austria.
Keywords
mass movement, debris flow, geophysics, seismic reflection, seismic
refraction, upper Austria.
Related Book
Other papers in this volume
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