Exploring the hydrogeochemical evolution of cold and thermal waters in the Sarein-Nir area, Iran using stable isotopes (δ18O and δD), geothermometry and multivariate statistical approaches

Barzegar, Rahim; Moghaddam, Asghar Asghari; Tziritis, Evangelos; Adamowski, Jan; Nassar, Jessica Bou; Noori, Mohammad; Aalami, Mohammad Taghi; Kazemian, Naeimeh

doi:10.1016/j.geothermics.2020.101815

Cited by 13 publications

(8 citation statements)

References 44 publications

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“…The Ca 2+ /HCO3 − ratio can be used to further investigate carbonate dissolution (calcite = 1:1, dolomite = 1:2) (Equations (12) and (13)). In Figure 6c, most groundwater samples of group 1 were sandwiched between 1:1 and 1:2 equilines, indicating carbonate dissolution.…”

Section: Hydrogeochemical Processmentioning

confidence: 99%

“…The Ca 2+ /Mg 2+ ratio is usually used to distinguish the ions source between carbonate and silicate dissolution. Dolomite dissolution would lead to the Ca 2+ /Mg 2+ ratio equal to one, while calcite dissolution may produce the Ca 2+ /Mg 2+ ratio higher than one The Ca 2+ /HCO 3 − ratio can be used to further investigate carbonate dissolution (calcite = 1:1, dolomite = 1:2) (Equations (12) and (13)). In Figure 6c, most groundwater samples of group 1 were sandwiched between 1:1 and 1:2 equilines, indicating carbonate dissolution.…”

Section: Hydrogeochemical Processmentioning

confidence: 99%

“…The Ca 2+ /Mg 2+ ratio is usually used to distinguish the ions source between carbonate and silicate dissolution. Dolomite dissolution would lead to the Ca 2+ /Mg 2+ ratio equal to one, while calcite dissolution may produce the Ca 2+ /Mg 2+ ratio higher than one (Equations (12) and (13)). Besides, the Ca 2+ /Mg 2+ ratio higher than 2 is the result from silicate dissolution.…”

Section: Hydrogeochemical Processmentioning

confidence: 99%

“…(Equations (12) and (13)). Besides, the Ca 2+ /Mg 2+ ratio higher than 2 is the result from silicate dissolution.…”

Section: Hydrogeochemical Processmentioning

confidence: 99%

“…To understand hydrogeochemical compositions of groundwater, a series of methods have been adapted in recent decades. Hierarchical cluster analysis (HCA) and principal component analysis (PCA) are the representations of multivariate statistical approaches broadly carried out in the field of hydrogeochemical study [13][14][15]. They are feasible to classify a mass of hydrogeochemical data into different groups and efficiently extract principle components determining hydrogeochemical compositions.…”

Section: Introductionmentioning

confidence: 99%

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Multivariate Analysis and Geochemical Signatures of Shallow Groundwater in the Main Urban Area of Chongqing, Southwestern China

Chen

Tang

Jian

et al. 2020

Water

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Hydrogeochemical processes and quality assessment for shallow groundwater are pivotal issues to be solved in many regions over the world due to the easy access of shallow groundwater. In this study, eighty-six water samples were collected from shallow aquifers of Chongqing, China, during July–September 2019. Multivariate statistical techniques, major ion ratios, and geochemical modeling were integrated to investigate hydrogeochemical characteristics and controlling factors. Afterwards, groundwater quality in spatial was classified by entropy-weighted water quality index and geographic information system (GIS) spatial analysis. Groundwater samples were alkaline and possessed high total dissolved solids (TDS) values. Two-group samples were distinguished as mix cations-HCO3-SO4 (group 1) and Ca-Mg-SO4 (group 2) facies. Hydrogeochemical compositions of group 1 samples were dominated by silicate dissolution and ion exchange, while sulfate and calcite dissolution were the main factors influencing the hydrogeochemical characteristics of group 2. The overall quality of groundwater samples varied greatly from excellent quality to extremely poor quality. Group 1 samples were found with excellent and good quality and suitable for drinking purposes. Group 2 samples were all unsuitable for direct drinking purposes as the quality varied from medium to extremely poor, but were spatially limited. Groundwaters with relatively poor quality were due to dissolution of sulfate that were locally enriched in the aquifers. The new findings of this study are expected to provide the reference for future management and sustainable exploitation of groundwater in Chongqing.

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Section: Hydrogeochemical Processmentioning

confidence: 99%

Section: Hydrogeochemical Processmentioning

confidence: 99%

“…The Ca 2+ /Mg 2+ ratio is usually used to distinguish the ions source between carbonate and silicate dissolution. Dolomite dissolution would lead to the Ca 2+ /Mg 2+ ratio equal to one, while calcite dissolution may produce the Ca 2+ /Mg 2+ ratio higher than one (Equations (12) and (13)). Besides, the Ca 2+ /Mg 2+ ratio higher than 2 is the result from silicate dissolution.…”

Section: Hydrogeochemical Processmentioning

confidence: 99%

“…(Equations (12) and (13)). Besides, the Ca 2+ /Mg 2+ ratio higher than 2 is the result from silicate dissolution.…”

Section: Hydrogeochemical Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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