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Geological subsurface model of the Austrian Molasse Basin
doi: 10.24341/tethys.191
Das Molassebecken im nördlichen Alpenvorland in Nieder- und Oberösterreich sowie in Salzburg, erstreckt sich an der Erdoberfläche von der Böhmischen Masse im Norden bis zur Alpenüberschiebungsfront im Süden. Im Untergrund reichen die Molassesedimente jedoch noch deutlich weiter nach Süden bis unter das alpine Orogen. Steigende Nutzungsanforderungen an das Molassebecken in den Bereichen Bergbau, Geothermie, Thermalwasser sowie Speicherung von Erdgas und CO2 waren ausschlaggebend dafür, ein geologisches Untergrundmodell dieses Gebiets zu erstellen. Dieses Modell soll als Grundlage für ein gemeinsames Untergrundmanagement dienen, um regionalen Ressourcenkonflikten vorzubeugen. Das hier vorliegende Untergrundmodell besteht aus den neun stratigrafischen Haupteinheiten der autochthonen Molasse, dem Kristallin der Böhmischen Masse mit paläozoischer Sedimentbedeckung sowie einem Modellkörper, welcher die allochthone Molasse, die Flyschzone und das Helvetikum umfasst. Das gesamte Modell besitzt eine laterale Ausdehnung von ca. 12.250 km² und reicht bis in eine Tiefe von -8.000 m unter Meeresspiegel.
The Molasse Basin in the northern foreland of the Alps covers Lower- and Upper Austria as well as Salzburg between the outline of the Bohemian Massif in the north and the Alpine frontal thrust in the south. However, sediments of the Molasse Basin reach far towards south beneath the Alpine Orogen. Increasing usage requirements in the Molasse Basin regarding mining, geothermal energy and storage of CO2 and natural gas have been the main driving force for creating a geological subsurface model of the respective area. The model can therefore form the basis for a common subsurface management framework in order to prevent possible conflicts over resources. The published subsurface model includes nine stratigraphic units of the Autochthonous Molasse, the Crystalline Basement of the Bohemian Massif with overlying, Paleozoic sediments as well as a model unit combing the Allochthonous Molasse, the Flysch Zone and the Helvetic superunit. The whole model covers an area of about 12,250 km² and reaches to a depth of -8,000 m below sealevel.
The model was created using the SKUA-GOCAD™ software suite by combining all published, geological information on the subsurface (geological maps, cross-sections, contour maps and geophysical data). Subsequently, relevant data of the investigation area were digitized and combined into a common 3D modelling environment, where they acted as data points for creating interpolated, geological surfaces using automatical and manual approaches. The modelled geological layers were exported as .DXF files from SKUA-GOCAD™. For more information about the underlying data please see the data description document.
- Geological Survey of Austria Austria
- GeoSphere Austria Austria
- GeoSphere Austria Austria
Geopotentials, Lower Austria, Hydrogeology, Foreland Basin, Upper Austria, Geothermal energy, Salzburg
Geopotentials, Lower Austria, Hydrogeology, Foreland Basin, Upper Austria, Geothermal energy, Salzburg
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