A Conceptual Model of the Tianjin Geothermal System Based on Isotopic studies
- Key words
- geothermal water, isotope, hydrothermal model
- Location
- Tianjin, China
- Conference
- World Geothermal Congress
- Year
- 2005
- Session
- 19. Hydrogeology
- Language
- English
- Paper number
- 1935
Full text
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Abstract
The isotopic technique is an effective measure to set up the conceptual model of a hydrothermal system. A deep circular geothermal system exists in Tianjin, including the semi-open and semi-closed karst geothermal subsystem in the bedrock and closed porous water subsystem in the clastic rocks. The geothermal water is originated from the ancient precipitation of 21000-10000 BP. Since Holocene epoch, the geothermal water is sealed for heating up. The mainly feeding channels are the karst conduits in weathered carbonate rocks of Proterozoic and Lower Paleozoic.
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