澜沧江某水电站热水系统循环演化机制研究

STUDY ON THE CYCLE EVOLUTION MECHANISM OF THE HOT WATER SYSTEM OF A HYDROPOWER STATION ON LANCANG RIVER

研究区位于西藏自治区昌都市芒康县境内曲孜卡乡和盐井乡交界的澜沧江河段,由于复杂的地质背景,形成了一系列物理、化学特征各异的温泉及盐泉。研究区域热水系统主要以盐泉泉群和中低矿化温泉的形式分散出露,根据地质地热结构以及热水水文地球化学特征,将区内热水系统划分为盐井系统、右岸曲孜卡系统、左岸玄武岩系统以及外围温泉。通过工程区区域地质背景及周边热水同位素特征,结合工程区及周边热水系统的热储温度、热储深度计算,研究各热水系统的循环演化机制对工程区的影响具有十分重大的意义。

The project area is located in the Lancang River section between Quzika Township and Yanjing Township in Mangkang County, Changcheng City, Tibet Autonomous Region. Due to the complicated geological background, a series of hot springs and salt springs with different physical and chemical characteristics have been formed. According to the geothermal structure and hydrogeochemical characteristics of hot water, the hot water system in the study area is divided into salt well system, Quzika system on the right bank, basalt system on the left bank and peripheral hot springs. Through regional geological background and isotope characteristics of surrounding hot water in engineering area, combined with the calculation of thermal storage temperature and depth of thermal storage in the project area and its surrounding hot water system, it is of great significance to study the influence of the cycle evolution mechanism of each hot water system on the project area.