TU Darmstadt / ULB / TUbiblio

Detecting thermal anomalies within the Molasse Basin, southern Germany

Rühaak, W. ; Rath, V. ; Clauser, C. (2010)
Detecting thermal anomalies within the Molasse Basin, southern Germany.
In: Hydrogeology Journal, 18 (8)
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

The groundwater flow regime at great depth within the Molasse Basin (SW Germany) was studied. Data relevant for a flow model at 600--1,600~m depth are sparse in the western part of the basin. However, temperature measurements are available covering much of the area at a wide range of depths. Therefore, a thermal 3D steady-state model was set up with the aim of comparing modeled with observed subsurface temperatures. Stratigraphic information from many boreholes was also available, but only a few values of rock thermal conductivity and heat-production rate could be obtained. Some strong thermal residual anomalies were identified with respect to the purely conductive model, especially along fault zones, and within stratigraphic layers with high hydraulic conductivity. These anomalies can be explained by various advective heat-transport mechanisms, yet most explanations can be eliminated. The most plausible constellation explaining the major positive thermal anomalies of 10 Kelvin and more is a fault zone of E--W strike, intersected by an aquifer with flow parallel to the fault zone. This concept was investigated by using a simplified type model. In spite of some shortcomings, the method presented here can be used to identify temperature anomalies, and to identify possible explanations.

Typ des Eintrags: Artikel
Erschienen: 2010
Autor(en): Rühaak, W. ; Rath, V. ; Clauser, C.
Art des Eintrags: Bibliographie
Titel: Detecting thermal anomalies within the Molasse Basin, southern Germany
Sprache: Englisch
Publikationsjahr: 2010
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Hydrogeology Journal
Jahrgang/Volume einer Zeitschrift: 18
(Heft-)Nummer: 8
Kurzbeschreibung (Abstract):

The groundwater flow regime at great depth within the Molasse Basin (SW Germany) was studied. Data relevant for a flow model at 600--1,600~m depth are sparse in the western part of the basin. However, temperature measurements are available covering much of the area at a wide range of depths. Therefore, a thermal 3D steady-state model was set up with the aim of comparing modeled with observed subsurface temperatures. Stratigraphic information from many boreholes was also available, but only a few values of rock thermal conductivity and heat-production rate could be obtained. Some strong thermal residual anomalies were identified with respect to the purely conductive model, especially along fault zones, and within stratigraphic layers with high hydraulic conductivity. These anomalies can be explained by various advective heat-transport mechanisms, yet most explanations can be eliminated. The most plausible constellation explaining the major positive thermal anomalies of 10 Kelvin and more is a fault zone of E--W strike, intersected by an aquifer with flow parallel to the fault zone. This concept was investigated by using a simplified type model. In spite of some shortcomings, the method presented here can be used to identify temperature anomalies, and to identify possible explanations.

Freie Schlagworte: Earth and Environmental Science
Fachbereich(e)/-gebiet(e): 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften > Fachgebiet Angewandte Geothermie
11 Fachbereich Material- und Geowissenschaften > Geowissenschaften
11 Fachbereich Material- und Geowissenschaften
Hinterlegungsdatum: 06 Nov 2014 13:28
Letzte Änderung: 07 Nov 2014 13:34
PPN:
Export:
Suche nach Titel in: TUfind oder in Google
Frage zum Eintrag Frage zum Eintrag

Optionen (nur für Redakteure)
Redaktionelle Details anzeigen Redaktionelle Details anzeigen