Formation of the chemical composition of brackish and brine groundwater in the Tuva depression and surrounding areas

Гусева, Наталья Владимировна; Kopylova, Yu. G.; Oidup, Ch. K.; Аракчаа, К. Д.; Rychkova, K. M.; Khvashchevskaya, A. A.; Ayunova, O. D.

doi:10.1016/j.rgg.2018.01.011

Cited by 3 publications

(2 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The chemical composition of groundwater is controlled by hydrogeochemical processes (Guseva et al 2018). The hydrogeochemical processes are dominated by water-rock interaction, which occurring in aquifers control the changes in water chemistry (Frape et al 1984).…”

Section: Introductionmentioning

confidence: 99%

“…In fractured granite aquifers dominated by aluminosilicate minerals, the chemical composition of groundwater can be characterized by dissolved silica (Anderson et al 2000). But its main hydrochemical type is still HCO 3 -Na with low salinity due to weak dissolution and hydrolysis of the minerals (Guseva et al 2018). The solubility of aquifer minerals and the reaction temperature determine the degree of water-rock interaction (Lasaga 1984).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Possible Source of Abnormally High Sodium Content in Low‐Salinity Geothermal Water

Mao¹,

Shi

et al. 2022

Groundwater

View full text Add to dashboard Cite

The dissolution of sodium-containing minerals in high-temperature geothermal systems can cause Na + to exceed 400 mg/L with high salinity. But the Na + of low-salinity geothermal water is mostly less than 100 mg/L in medium-low temperature geothermal systems. However, geothermal water with Na + up to 325.4 mg/L and total dissolved solids less than 650 mg/L was found in the Huangshadong geothermal field, which is a typical medium-low temperature hydrothermal system in South China. The water chemistry results indicate that thermal groundwater is uniformly HCO 3 -Na type with high sodium content (average 240.06 mg/L). All the thermal groundwater and shallow groundwater have the same meteoric origin based on δD and δ 18 O. According to water chemical geothermometers and multicomponent mineral equilibrium (MME) method, the reservoir temperature is estimated to be 100 to 130 • C at a maximum depth of 2.43 km. The estimation of the Cl − mixed indicator suggests that geothermal water has mixed with 51% to 72% of shallow groundwater, resulting in the reduction of Na + content in real geothermal water (Na + up to 685.2 mg/L). The simulated results of water-rock interactions indicate that mineral dissolution and ion exchange have minor contributions to Na + enrichment in geothermal water. Hydrochemical simulations and Gibbs diagrams suggest an additional source of high sodium: granite fluid inclusions are fractured into geothermal water at high temperatures. Granite fluid inclusions may only account for 3% to 5% of geothermal water, but they provide the main source of Na + in geothermal water.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Possible Source of Abnormally High Sodium Content in Low‐Salinity Geothermal Water

Mao¹,

Shi

et al. 2022

Groundwater

View full text Add to dashboard Cite

show abstract

Features of the Formation of Geochemical Types of Natural Waters in Certain Regions of Central Eurasia

Гусева

2020

Geochem. Int.

View full text Add to dashboard Cite

Genesis and Geological Significance of Permian Oilfield Water in the Western Periphery of the Mahu Sag, Junggar Basin, China

Zhang

Jin

et al. 2023

Minerals

View full text Add to dashboard Cite

Oilfield water contains valuable geological information and plays an important role in petroliferous basins, being closely related to diagenesis, reservoir physical properties, and hydrocarbon preservation conditions. Here we present a case study of oilfield water in Permian formations in the western periphery of the Mahu Sag, Junggar Basin, China. The genesis of oilfield water and its application in oil exploration were investigated through the coupling of tectonic activity, paleoclimate, and water–rock interaction. Volcanic activity provided a rich source of ions, and a hot paleoclimate intensifies the evaporation and concentration of sedimentary water. Tectonic fractures offered channels for water exchange among formations. Water–rock reactions, marked by sodic feldspathization and calcium feldspar dissolution, had profound effects on the oilfield water type and reservoir properties. We established a link between oilfield water and favorable targets for oil exploration. In terms of vertical trends, the Jiamuhe and Upper and Lower Urho formations have strong sealing abilities for hydrocarbon preservation. In the horizontal dimension, areas with high total-dissolved-solid and CaCl2 concentrations, low rNa/rCl, rSO4 × 100/rCl, (rHCO3+CO3)/rCa, and rMg/rCa ratios are favorable for oil exploration.

show abstract

Formation of the chemical composition of brackish and brine groundwater in the Tuva depression and surrounding areas

Cited by 3 publications

References 8 publications

The Possible Source of Abnormally High Sodium Content in Low‐Salinity Geothermal Water

The Possible Source of Abnormally High Sodium Content in Low‐Salinity Geothermal Water

Features of the Formation of Geochemical Types of Natural Waters in Certain Regions of Central Eurasia

Genesis and Geological Significance of Permian Oilfield Water in the Western Periphery of the Mahu Sag, Junggar Basin, China

Contact Info

Product

Resources

About