鲁山五大温泉水化学特性及其形成机制研究

Study on the Water Chemical Characteristics and Formation Mechanism of the Five Hot Springs in Lushan

摘要: 在鲁山县境内断裂带极其发育，孕育了丰富的中低温地热资源。然而，关于该地区深部地热水的水热成因机制，目前尚不明确。本研究通过对多组地热水、浅层地下水及地表水的水化学组分进行分析，通过离子组分的分析来研究地热水的补给高程、循环深度及其冷水混入比例，研究结果显示，研究区水化学离子组分主要以$S{O}_4^{2-}$ 、$HC{O}_3^{-}$ 和Na⁺为主，其形成受控于硫酸盐和碳酸盐岩等矿物的溶解作用以及阳离子的交替吸附过程。地热水的补给高程为571.5~1650米，指示补给区位于伏牛山东麓。地热水循环的深度范围为1804~1958.3米。通过混合比例法估算，车村–下汤断裂带与南部的二郎庙–温汤庙断裂带及水磨庄–栗村断裂深层热储的温度为59.36℃~149.34℃，同时在地热水中观察到较高的冷水混入比例。

Abstract: The fault zone in Lushan County is extremely developed, giving birth to abundant medium and low temperature geothermal resources. However, the mechanism of hydrothermal origin of deep geothermal water in the region is not yet clear. In this study, the recharge elevation, circulation depth and cold water mixing ratio of geothermal water were studied by analyzing the hydrochemical components of geothermal water, shallow groundwater and surface water, and the recharge elevation, circulation depth and cold water mixing ratio were studied through the analysis of ion components, and the results showed that the water chemical ion components in the study area were mainly $S{O}_4^{2-}$ , $HC{O}_3^{-}$ and Na⁺, and their formation was controlled by the dissolution of minerals such as sulfate and carbonate rocks and the alternating adsorption process of cations. The recharge elevation of geothermal water is 571.5~1650 meters, indicating that the recharge area is located at the eastern foot of Funiu Mountain. The depth of the geothermal water cycle ranges from 1804~1958.3 meters. According to the mixed ratio method, the temperature of the Checun-Xiatang fault zone, the Erlangmiao-Wentangmiao fault zone and the Shuimozhuang-Licun fault in the south are estimated to be 59.36˚C~149.34˚C, and a high proportion of cold water is observed in the geothermal water.