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 Tian**, 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 21-10 kaBP. 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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Reference
Zhang **gen, Analysis about the geochemistry andorigin of geothermal water in Tian**, Publication of IHER, 1990, 6: 1–24.
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Wang, K., Zhu, J. A conceptual model of the Tian** geothermal system based on isotopic studies. Sci. China Ser. E-Technol. Sci. 44 (Suppl 1), 160–164 (2001). https://doi.org/10.1007/BF02916809
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DOI: https://doi.org/10.1007/BF02916809