岩石矿物学杂志2025，Vol.44Issue(3)：611-618,8.DOI:10.20086/j.cnki.yskw.2025.4102
深部超临界地热条件下钾长石的溶解特征
Dissolution law of potassium feldspar under deep supercritical geothermal conditions
摘要
Abstract
Supercritical geothermal resource is a kind of renewable and clean energy with great potential.Its forma-tion and development process is accompanied by strong water-rock chemical reaction.By conducting dissolution ex-periments of potassium feldspar in pure water at 300～500℃ and 25～50 MPa,this study clarified the influence of temperature and pressure changes on the solubility of potassium feldspar under sub-critical to supercritical geother-mal conditions,and revealed the evolution mechanism of its dissolution behavior.The results show that:① Both temperature and pressure are important factors affecting the solubility of potassium feldspar under subcritical and su-percritical geothermal conditions.② At 400℃,the solubility of potassium feldspar is positively correlated with the pressure.When the pressure is 35 MPa,the solubility of potassium feldspar increases first,then decreases and then increases with the increase of temperature,showing a fluctuation phenomenon.③ The variation characteristics of the solubility of potassium feldspar are related to the sharp changes in the properties of water(density,hydrogen bond,dielectric constant)under sub-critical and supercritical geothermal conditions.The results contribute to a better understanding of hydrogeochemical processes in supercritical geothermal systems.关键词
超临界地热/钾长石/高温高压/水岩反应/溶解度Key words
supercritical geothermal/potassium feldspar/high temperature and pressure/water-rock reaction/solubility分类
天文与地球科学引用本文复制引用
郜世隆,许天福,袁益龙,钟承昊,封官宏..深部超临界地热条件下钾长石的溶解特征[J].岩石矿物学杂志,2025,44(3):611-618,8.基金项目
国家自然科学基金重点项目(42130303,42372283) National Natural Science Foundation of China(42130303,42372283) （42130303,42372283）
