Geochemistry of thermal waters in the Tengchong volcanic geothermal area, West Yunnan Province, China |
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| Authors: | Zhang Zhifei Liu Shibin Zhao Fengsan |
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| Affiliation: | 1. State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi''an 710069, China;2. Research Institute No. 203, CNNC, Xianyang, Shanxi, China;1. Department of Geosciences, Auburn University, Auburn, AL 36849, USA;2. Key Laboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking University, Beijing 100871, China;3. Department of Land Resource Engineering, Kunming University of Science and Technology, Kunming, Yunnan Province 650093, China;4. Institute of Geology, China Earthquake Administration, Beijing 100029, China;5. School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China;1. State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing 100101, China;4. Department of Earth Sciences, The University of Hong Kong, Hong Kong, China;5. State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China;1. Beijing SHRIMP Center, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;2. Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia;3. Department of Earth and Environment, Boston University, Boston, MA 02215, USA;4. Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China |
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| Abstract: | The Tengchong volcanic geothermal area is one of the areas in China which has powerful geothermal energy potential. The chemical compositions of the thermal waters discharged in this area were studied to obtain information on boiling and mixing relationships and average reservoir temperatures. Then a conceptual model of the Tengchong volcanic geothermal area was formulated. Hydrothermal areas have reservoir temperatures ranging from 90 to 150°C; such temperatures can be found in up to 60% of the 58 hydrothermal areas. Five hydrothermal areas have high temperatures, with an average reservoir temperature of more than 150°C, and occupy less than 10% of the total. The Hot Sea geothermal field is one of the five high temperature hydrothermal areas where a more detailed investigation was made. |
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