CAJ | 학술논문

通过对西藏谷露高温地热系统的热水进行水文地球化学特征分析来研究其成因模式。研究结果表明，研究区热水为中偏碱性水，矿化度较高，化学类型主要为 Cl·HCO3-Na 型和HCO3·Cl-Na 型。热水在沿主要控热断裂上升途中与围岩发生物质和能量的交换，水岩作用强烈，到达浅部之后，由于受到冷水的混合作用影响使得温度下降，在 Na-K-Mg 三角图上表现为局部成熟水和未成熟水。利用混合模型对热水未受到冷水混合影响之前的温度进行估算，得到热储的温度范围为195～260℃，冷水混入比例为52％～74％。
통과대서장곡로고온지열계통적열수진행수문지구화학특정분석래연구기성인모식。연구결과표명，연구구열수위중편감성수，광화도교고，화학류형주요위 Cl·HCO3-Na 형화HCO3·Cl-Na 형。열수재연주요공열단렬상승도중여위암발생물질화능량적교환，수암작용강렬，도체천부지후，유우수도랭수적혼합작용영향사득온도하강，재 Na-K-Mg 삼각도상표현위국부성숙수화미성숙수。이용혼합모형대열수미수도랭수혼합영향지전적온도진행고산，득도열저적온도범위위195～260℃，랭수혼입비례위52％～74％。
Through the researches on the hydro-geochemical characteristics of the thermal water in the Gulu high-temperature geothermal system,this paper studies the genetic model of the system.The result shows that the thermal water of the study area is neuter and leaning alkalinity water with high TDS and belongs to Cl·HCO3-Na type and HCO3 ·Cl-Na type.The thermal water has a deep cycle depth and exchanges matter and energy with the wall rocks during rising.Because of the mixing of cold water, the temperature of the thermal water decreases when it arrives to the shallows. Therefore,the thermal water belongs to the local mature water and immature water in the Na-K-Mg triangle diagram.The authors use the mixture model to estimate the temperature of the thermal water that is not mixed with cold water.The results show that the temperature range of the geothermal reservoir is 195~ 260℃ and the cold water mixing ratio is 52%~74%.