岩矿测试2024，Vol.43Issue(4)：568-581,14.DOI:10.15898/j.ykcs.202403030028
江西洪江—钱山断裂带中低温高氟地热水水文地球化学特征与成因机制
Identifying the Hydrochemical Characteristics and Genetic Mechanism of Medium-Low Temperature Fluoride-Enriched Geothermal Groundwater in the Hongjiang—Qianshan Fault of Jiangxi Province
摘要
Abstract
The Hongjiang—Qianshan fault has abundant medium-low temperature geothermal resources.However,the excessive fluorine concentration in geothermal groundwater restricts the development and utilization of geothermal resources.20 samples were collected in this region for identifying the genetic mechanism of medium-low temperature of fluoride-enriched geothermal resources.The hydrochemical results indicate that the hydrochemical characteristic of high fluoride geothermal groundwater is HCO3-Na.The groundwater environment is alkaline and weakly alkaline.The fluoride concentration in geothermal groundwater is 2-12 times greater than the upper limited value,while those in the surface water and shallow groundwater are within the permittable threshold range.The isotopic results reveal that the recharge elevations and circulation depth are 797-2186m and 893-1893m,respectively.Quartz provides the most reliable estimations of reservoir temperatures,ranging from 79.4℃ to 113.1 ℃.The fluoride in geothermal groundwater originates from the rock weathering and mineral dissolution.Cation exchange and alkaline condition are the main influence factors for fluorine enrichment.The BRIEF REPORT is available for this paper at http://www.ykcs.ac.en/en/article/doi/10.15898/j.ykcs.yk202403030028.关键词
氟/中低温地热水/水文地球化学/同位素/江西Key words
fluoride/medium-low temperature geothermal water/hydrochemistry/isotope/Jiangxi Province分类
天文与地球科学引用本文复制引用
张寿川,刘凯,王路瑶,朱伟,邓岳飞,余成华..江西洪江—钱山断裂带中低温高氟地热水水文地球化学特征与成因机制[J].岩矿测试,2024,43(4):568-581,14.基金项目
中国地质调查局地质调查项目(DD20221677-2) （DD20221677-2）
中央财政基本科研业务费资助项目(JKY202406,JKYQN202307) （JKY202406,JKYQN202307）
