滇西潞西盆地温泉水文地球化学特征及其成因

云南大理至瑞丽铁路西段的潞西盆地含水层结构复杂、温泉甚多。选择该盆地的典型温泉——法帕温泉和芒留温泉,针对该区温泉成因分析中存在的疑点问题开展了地质、水文地质和水文地球化学调查工作。在分析该区温泉的水文地球化学特征,并与不同条件的温泉作类比研究的基础上,进一步剖析了温泉的成因。研究结果表明,法帕温泉和芒留温泉为典型的断裂型温泉,接受大气降水补给,下渗后被断层中的高温内生流体加热并在断层中储集和运移,储热层均为灰岩、白云质灰岩及泥灰岩,热储深度为2000m左右,温度可达160℃左右。

Hydrogeochemical characteristics and genetic analysis of hot springs in Luxi basin,western Yunnan Province

There are complex structures of aquifer and numerous hot springs in Luxi basin.The authors carried out geological,hydrogeological and hydrogeochemical survey of two typical hot springs（the Fapa hot spring and Mangliu hot spring） to probe into the doubtful points in the analysis of the hot springs,and made a comparison with hot springs formed under different conditions.On such a basis,the genesis of the hot springs was further analyzed.The results show that the Fapa hot spring and Mangliu hot spring are typical fault hot springs,their sources should be precipitation and endogenous high-temperature fluids,and the heat-storing layer is composed of dolomite and dolomitic limestone of the Permian Shazipo Formation Jurassic and Mengga Formation.It is estimated that the thermal energy storage temperature could reach 160℃ at the depth of 2000m.