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Hydrochemical characterisation of a Major central European heat flux anomaly: the Bürchau geothermal spring system, Southern Black Forest, Germany

Rolker, J. 1; Schill, Eva ORCID iD icon 2; Stober, I. 1; Schneider, J.; Neumann, T. 3; Kohl, T. 1
1 Institut für Angewandte Geowissenschaften (AGW), Karlsruher Institut für Technologie (KIT)
2 Institut für Nukleare Entsorgung (INE), Karlsruher Institut für Technologie (KIT)
3 Fakultät für Bauingenieur-, Geo- und Umweltwissenschaften – Institut für Mineralogie und Geochemie (IMG), Karlsruher Institut für Technologie (KIT)


Background: The possible signature of deep fluids originating from processes occurring during infiltration or circulation in a remote valley in the Black Forest (Germany), a typical infiltration area in the crystalline basement which represents a possible recharge zone of one of the major heat flux density anomalies in central Europe, has been hydrochemically characterised. Chemical and isotopic compositions of two warm springs and several cold springs in Bürchau as well as water from the Badenweiler Spa were sampled three times during June and October 2013.
Methods: A number of 70 water samples were taken at natural outlet conditions and analysed for major and trace elements, water H/O-isotope ratios and sulphur isotope ratios of dissolved sulfate. A chlorofluorocarbon (CFC) analysis was conducted to determine the underground residence time of the thermal water. To assess water-rock interactions seven rock samples representing the occurring lithological units of the study area were prepared to thin sections for polarization microscopic analysis.
Results: The main spring in Bürchau discharging water with a temperature up to T = 18.1°C at flow rates of approximately 0.2 L s$^{-1}$ is Na-Ca-HCO$_{3}$-dominated and generally low mineralised (total dissolved solids (TDS) of about 150 mg L$^{-1}$). ... mehr

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DOI: 10.5445/IR/1000045998
DOI: 10.1186/s40517-014-0021-1
Zitationen: 8
Web of Science
Zitationen: 7
Zitationen: 8
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Geowissenschaften (AGW)
Institut für Nukleare Entsorgung (INE)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2015
Sprache Englisch
Identifikator ISSN: 2195-9706
KITopen-ID: 1000045998
HGF-Programm 35.14.01 (POF III, LK 01) Effiziente Nutzung geothermisch. Energie
Erschienen in Geothermal Energy
Verlag SpringerOpen
Band 3
Heft 5
Seiten 1-18
Bemerkung zur Veröffentlichung DOI 10.1186/s40517-014-0021-1
Nachgewiesen in Dimensions
Web of Science
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