Geochemistry of Stream Waters of the Lo River Catchment, Ha Giang Province (Northern Vietnam)

IF 0.7 4区 地球科学 Q4 GEOCHEMISTRY & GEOPHYSICS
Anh Tuan Tran, Luong Duc Le, R. B. Shakirov, N. S. Syrbu, Dung Thi Pham, Dang Thanh Pham, Lien Thi Nguyen, Qua Xuan Nguyen, Thu Thi Nguyen, Hai Dinh Vu, Ly Hoang Vu, N. S. Lee, A. L. Venikova
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Abstract

A set of 41 stream water samples of the Lo River catchment, Ha Giang province, collected in dry season was analyzed for pH, major cation and anion, trace element concentrations. The stream waters exhibits a midly acidic to alkaline, meanwhile, the Total Dissolved Solids (TDS) values have a wide range of 17.4–284.9 mg L–1. Among major cations and anions, the stream water within the Lo River catchment is characterized by the predominant presence of Ca2+ and \({\text{HCO}}_{3}^{ - }\). This compositional pattern gives rise to the emergence of the Ca–Mg–HCO3 water type as the most dominant species, followed by Na–Cl, Ca–Mg–Cl–SO4 and Na–HCO3–Cl types. However, the distribution of these water types corresponds closely with the geological conditions, with Na–Cl type prevailing in the watershed of granite complex, while watersheds characterized by lithologies such as Quaternary sediments, limestone, marble, shale, schist, and sandstone primarily exhibit the Ca–Mg–HCO3 water type. The dominant reaction in the water system is the dissolution of carbonate minerals, like calcite and dolomite, followed by the contribution of modest rainfall during the dry season, and small-scale processes of mixing and cation exchange. Comparison of major ions and trace element with technical standard reveal the stream waters are generally deemed suitable for the routine activities of the local population in Ha Giang province. However, stream water of a few specific sites may require treatment before these waters can be safely utilized.

Abstract Image

Abstract Image

河江省(越南北部)洛河集水区溪水的地球化学特征
摘要 对河江省洛河流域旱季采集的 41 份溪水样本进行了 pH 值、主要阳离子和阴离子、微量元素浓度分析。溪水呈中酸性至碱性,同时,总溶解固体(TDS)值范围很广,为 17.4-284.9 mg L-1。在主要阳离子和阴离子中,洛河集水区的溪水以 Ca2+ 和 \({\text{HCO}}_{3}^{ - }\) 为主。这种成分模式导致 Ca-Mg-HCO3 水类型成为最主要的物种,其次是 Na-Cl、Ca-Mg-Cl-SO4 和 Na-HCO3-Cl 类型。不过,这些水类型的分布与地质条件密切相关,花岗岩群流域以 Na-Cl 型为主,而以第四纪沉积物、石灰岩、大理岩、页岩、片岩和砂岩等岩性为特征的流域则以 Ca-Mg-HCO3 水类型为主。水系中的主要反应是方解石和白云石等碳酸盐矿物的溶解,其次是旱季的少量降雨,以及小规模的混合和阳离子交换过程。主要离子和微量元素与技术标准的比较显示,河江省的溪水一般都适合当地居民的日常活动。不过,少数特定地点的溪水可能需要经过处理才能安全利用。
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来源期刊
Lithology and Mineral Resources
Lithology and Mineral Resources 地学-地球化学与地球物理
CiteScore
1.30
自引率
37.50%
发文量
29
审稿时长
>12 weeks
期刊介绍: Lithology and Mineral Resources is an international peer reviewed journal that publishes articles on a wide range of problems related to the formation of sedimentary rocks and ores. Special attention is given to comparison of ancient sedimentary rock and ore formation with present-day processes. The major part of the journal is devoted to comparative analysis of sedimentary processes on the continents and in oceans, as well as the genetic aspects of the formation of sedimentary and hydrothermal–sedimentary mineral resources. The journal welcomes manuscripts from all countries in the English or Russian language.
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