Hydrochemical Characteristics and Genesis of Groundwater in Taoshan Granite Body, Yushan Uplift Area, South Jiangxi, China

作者：Xinfeng Wang, Yan Wang, Yan Wang, Ge Gao, Mingming Li, Hongyan An, Kuanzhen Mao, Yibing Wang, Yibing Wang, Jiangong You, Zhijie Sun, Lei Gong, Mian Song, Yuanqing Liu · 发表于：Water · 年份：2025 · DOI：10.3390/w17070974 · 被引用次数：5 · 研究领域：Groundwater and Isotope Geochemistry、Groundwater flow and contamination studies、Hydrocarbon exploration and reservoir analysis

Drawing upon an understanding of the distribution characteristics of groundwater in the Taoshan rock mass within the Yushan Uplift region of southern Jiangxi, this study utilizes mathematical statistics, ion ratio coefficients, factor analysis, and mineral dissolution equilibrium methods to characterize in detail the hydrochemical features of groundwater in humid mountainous areas. Furthermore, the study delves into the lithological source control and the primary natural mechanisms that underlie these characteristics. The results indicate that the average pH of groundwater in the study area is 7.13, classifying it as weakly alkaline. The dominant cations are Ca2+ and Na+, accounting for 61% and 26% of the total cations, respectively, while the dominant anion is HCO3−, constituting 91% of the total anions. The total dissolved solids (TDS) range from 37.93 mg/L to 228.16 mg/L, indicating low mineralization. The groundwater types are primarily HCO3-Ca·Na and secondarily HCO3-Ca. The groundwater type is mainly controlled by rock weathering, with the primary ion sources influenced by the weathering and dissolution of silicate rocks, supplemented by contributions from carbonate rock dissolution. Ion ratio analysis further confirms that the major ions in groundwater predominantly originate from the weathering of silicate minerals, with minimal influence from human activities. Na+, K+, and H2SiO3 are primarily derived from the weathering and dissolution of silicate rocks, while the w...