GEOTHERMAL RESOURCES AND CRUSTAL THERMAL STRUCTURE OF THE QINGHAI-TIBET PLATEAU
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摘要: 青藏高原具有独特的地壳结构和高热背景。南部的喜马拉雅地块属于"热壳冷幔"型,拉萨-冈底斯地体属于"热壳热幔"型地块,该区域内中地壳范围内存在一低速高导层,可能为部分熔融岩浆囊,形成了规模宏伟的地热带。高原水热活动带主要出露在喜马拉雅-冈底斯-念青唐古拉之间,>25℃的水热区有283处,>80℃的沸、热泉有近40处。著名的羊八井高温热储地热田,已经建成装机容量达25.18 MW的地热电站,为拉萨输送了大量电力,地热资源在高原能源结构中占有重要的地位,具有巨大的开发前景和价值。Abstract: The Qinghai-Tibet Plateau has a unique crustal structure and a high-heat background.The Himalaya terrane in the south is of "hot crust-cold mantle" type and the Lhasa-Gangdise terrane is of "hot crust-hot mantle" type.There is a low-velocity,high-conductivity layer in the middle crust under the region,which is probably a partially molten magma pocket,forming a gigantic geothermal zone.The hydrothermal activity zone of the plateau is mainly exposed between the Himalaya and Gangdise-Nyainqêntanglha.There are 283 hydrothermal areas with temperatures >25℃ and nearly 40 boiling and hot springs with temperatures >80℃.In the famous Yangbajain high-temperature reservoir geothermal field a geothermal power station with an electricity-installed capacity of 25.18 MW has been built,which supplies vast amount of electric power to Lhasa.The geothermal resources occupy an important position in the energy structure on the plateau and have great development prospects and value.
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Key words:
- Qinghai-Tibet Plateau /
- crustal thermal structure /
- geothermal resources
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