Seawater inrush assessment based on hydrochemical analysis enhanced by hierarchy clustering in an undersea goldmine pit, China

Li, Guoqing; Wang, Xinqing; Meng, Zhaoping; Zhao, Haijun

doi:10.1007/s12665-013-2888-8

Cited by 17 publications

(9 citation statements)

References 26 publications

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“…The bottom Quaternary layer, which is mainly composed of clay, silty clay, and marine mud, is impermeable and largely blocks contact with the pore water, seawater, and the fractured rock masses. However, this layer is variably 0.8-10 m thick and this high variability casts doubts over its impermeability (Li et al , 2014aLiu et al 2012;Zhao et al 2012a, b).…”

Section: Hydrogeologymentioning

confidence: 99%

Hydrochemical Prediction of Mine Water Inrush at the Xinli Mine, China

Meng

Wang

et al. 2016

Mine Water Environ

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Seawater poses a great threat to the Xinli Mine, an undersea gold mine in China. A hydrochemical method was used to assess the risk of sea water inrush into the mine. A detailed hydrochemical survey and sampling were carried out and the concentrations of conservative ions in the mine water were analyzed. Principal component analysis indicated that the potential water inrush channels were located in the hanging wall of the ore-controlling fault. A composite principal component was calculated from the Na ? , Cl -, Mg 2? , SO 4 2-, and K ? concentrations, which reflected the effects of potash feldspathization and cation exchange, to assess the risk of seawater inrush.

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Section: Hydrogeologymentioning

confidence: 99%

Hydrochemical Prediction of Mine Water Inrush at the Xinli Mine, China

Meng

Wang

et al. 2016

Mine Water Environ

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“…Most of the mine waters were highly mineralized water (TDSs in mine water are higher than that in sea water) but the K + concentrations in mine water were lower than that in sea water. It indicates that rock and soil can adsorb K + from water [35]. The large floating range of the minimum and maximum values of the K + concentrations of mine water indicates that the K + is a non-conservative species.…”

Section: Hydrochemical Analysismentioning

confidence: 99%

“…Thus, there were D-shifts (the enrichment of D) in the water samples. When the space where water is stored is closed for a long time, desulfurization will occur, and SO 4 2− will be reduced to H 2 S and S. Thus, there will be H 2 S in the brine which is stored in the bedrock [35,38]. The exchanges with H 2 S could lead to the enrichment of 2 H in water [39].…”

Section: Mixing Calculation and Deviation Analysismentioning

confidence: 99%

Source Identification and Quantification of Seepage Water in a Coastal Mine, in China

Duan

Guo

et al. 2019

Water

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The Sanshandao gold mine, which is the largest coastal mine in China, is under threat from seawater intrusion and water inrush. The objective of this study is to determine the water end-members (seawater, freshwater, and brine) of the seepage water in the mine and quantify the proportion of end-members. Non-conservative ions and ion exchange were identified by using hydrogeochemical analysis. Then, the principal component analysis (PCA) was used to identify the end-members of mine water. Three end-members were identified, so a ternary mixture model was applied to compute the mixing ratios. The potential water flow channels and the prevailing supply patterns were inferred by combining the results of mixing ratios with the tectonic and engineering geological conditions. The results indicate that the proportion of seawater in mine water is about 57%, the freshwater is about 16% and the brine is about 27% for the entire mine area, the prevailing supply pattern of seawater was lateral recharge, the water samples which were located in −510 m sublevel or in the northeast of prospecting line 2260 had high proportions of seawater, the freshwater supplied the groundwater mainly through the secondary fractures developed area in a vertical recharge and the influence depth was about −500 m, and F3 was the largest tensile-shear fault in the study area and it was both a watercourse for seawater and fresh water.

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“…Indeed, this dissolution is confirmed by the negative saturation indices of groundwater with respect to gypsum and halite. These salts are then leached, under rainfall, towards the groundwater (Li et al 2014). …”

Section: Mixing Of Groundwatermentioning

confidence: 99%

Application of Multivariate Statistical Techniques for Characterization of Groundwater Quality in the Coastal Aquifer of Nador, Tipaza (Algeria)

et al. 2016

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A b s t r a c tThe study focuses on the characterization of the groundwater salinity on the Nador coastal aquifer (Algeria). The groundwater quality has undergone serious deterioration due to overexploitation. Groundwater samplings were carried out in high and low waters in 2013, in order to study the evolution of groundwater hydrochemistry from the recharge to the coastal area. Different kinds of statistical analysis were made in order to identify the main hydrogeochemical processes occurring in the aquifer and to discriminate between different groups of groundwater. These statistical methods provide a better understanding of the aquifer hydrochemistry, and put in evidence a hydrochemical classification of wells, showing that the area with higher salinity is located close to the coast, in the first two kilometers, where the salinity gradually increases as one approaches the seaside and suggests the groundwater salinization by seawater intrusion.

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Seawater inrush assessment based on hydrochemical analysis enhanced by hierarchy clustering in an undersea goldmine pit, China

Cited by 17 publications

References 26 publications

Hydrochemical Prediction of Mine Water Inrush at the Xinli Mine, China

Hydrochemical Prediction of Mine Water Inrush at the Xinli Mine, China

Source Identification and Quantification of Seepage Water in a Coastal Mine, in China

Application of Multivariate Statistical Techniques for Characterization of Groundwater Quality in the Coastal Aquifer of Nador, Tipaza (Algeria)

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