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Kriterienkatalog für die Erfassung tiefreichender Störungen und ihrer geothermischen Nutzbarkeit in Deutschland

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Bruchhafte Verformungen erzeugen Störungen im tiefen Untergrund, die Fließwege für hydrothermale Fluide schaffen können. Tiefreichende Störungen stellen daher erfolgversprechende Explorationsziele für die geothermische Energienutzung dar. In Deutschland sind jedoch in den meisten Fällen die hydraulischen Eigenschaften von Störungen gerade aufgrund ihrer Tiefenlage im Vorfeld einer Geothermiebohrung unbekannt. Dennoch besteht die Möglichkeit, anhand ausgewählter Kriterien das geothermische Potenzial von Störungen plausibel zu beurteilen. Bisherige Erfahrungen aus geologischen Erkundungsmaßnahmen an Störungen liefern statistisch belegte Zusammenhänge zwischen Störungsgeometrie und Thermalwasservorkommen und deuten darauf hin, dass insbesondere die Zerrüttungszonen an Störungsenden und interferierenden Störungen (z.B. Relais-Rampen, kreuzende Störungen etc.) in Abhängigkeit vom Spannungsfeld untersuchungswürdig sind. Neben Störungsgeometrie und Spannungsfeld wurden weitere Indikatoren für die Abschätzung des geothermischen Potenzials von Störungen betrachtet.



Disruptive deformations create deep subsurface faults, which may result in the formation of hydrothermal fluid pathways. Deep-reaching faults are promising targets for geothermal exploration. In Germany, the hydraulic properties of faults are usually not known when geothermal wells are planned. However, there are documented and plausible criteria to assess the geothermal potential of faults in advance. Experience gained from geologic exploration of faults confirms an empirical correlation between fault geometry and the distribution of geothermal resources. Geothermal surveys indicate that damage zones at fault terminations and interfering faults (e.g. relay ramps, crossing faults etc.) could represent favourable settings for exploration in critically stressed areas. Besides fault geometry and stress regime, additional criteria are outlined for the assessment of the geothermal potential of faults.
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Keywords: BRUCHSYSTEME; DEEP GROUNDWATER; DEUTSCHLAND; FAULT; FRACTURE SYSTEMS; GEOTHERMAL POTENTIAL; GEOTHERMISCHES POTENZIAL; GERMANY; HOT SPRING; RESERVOIR; SPANNUNGSFELD; STRESS FIELD; STÖRUNG; THERMALQUELLE; TIEFENWÄSSER

Document Type: Research Article

Publication date: June 1, 2017

This article was made available online on May 30, 2017 as a Fast Track article with title: "Kriterienkatalog für die Erfassung tiefreichender Störungen und ihrer geothermischen Nutzbarkeit in Deutschland".

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  • Zeitschrift der Deutschen Gesellschaft für Geowissenschaften (ZDGG) is an international peer reviewed journal that accepts papers on research and applied topics in the Earth Sciences. It is published online and in print. One volume, consisting of four issues is published annually. The journal has been published by the German Geological Society since its foundation in 1848. It was relaunched in 2005.

    ZDGG invites the submission of English, German and French language papers from all fields of geology, hydrogeology, paleontology, tectonics, sedimentology, engineering geology and of course environmental geology to name a few. The editors of ZDGG also invite suggestions for thematic issues.

    Please note that ZDGG issues from Volume 170 are now available from the publisher's website at https://www.schweizerbart.de/journals/zdgg
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