Monitoring of flow field based on stable isotope geochemical characteristics in deep groundwater

Abstract

The water circulation in deep aquifers controls not only chemical composition of the groundwater, but also stable isotope composition. In order to analyze the flow field in the process of the deep groundwater circulation in different aquifers, specimens belonging to the fourth aquifer in the Quaternary (the fourth aquifer for short), the coal and sandstone cranny aquifer in the Permian, and Carboniferous (the coal catena aquifer for short), the Taiyuan group limestone aquifer in the Carboniferous (the Taiyuan limestone aquifer for short), and the limestone aquifer in the Ordovician (the Ordovician limestone aquifer for short) were gained from the top down in Renlou colliery and local Linhuan coalmine district, northern Anhui, China, in the study. δD, δ(18)O, and the content of tall dissolve solids (TDS for short) of these specimens were tested. The experimental results had revealed that the groundwater in the fourth aquifer and the Taiyuan limestone aquifer takes on (18)O excursion and the coal catena aquifer takes on D excursion in Linhuan coalmine district, while excursion characteristic in the Ordovician limestone aquifer is not evident in the coalmine district. By analysis, δ(18)O and the content of TDS are in negative relationship in the groundwater of the fourth aquifer and the Taiyuan limestone aquifer in Linhuan coalmine district, yet δD and the content of TDS are in positive relationship in the coal catena aquifer. Mining greatly influences the fourth aquifer and the coal catena aquifer so the groundwater in the fourth aquifer flows from northwest and southeast to mining areas and the groundwater in the coal catena aquifer flows from around to mining areas. However, mining does not influence the Taiyuan limestone aquifer evidently so the groundwater flows from east to west still.

Hydrogeochemical Characteristics and Water Quality Evaluation of Carboniferous Taiyuan Formation Limestone Water in Sulin Mining Area in Northern Anhui, China

“…No water sample points fall in the precipitation area, indicating that there is no direct hydraulic connection between the Taiyuan formation limestone water and atmospheric precipitation in the study area. Chen et al [30] conducted hydrogen and oxygen stable isotope tests on 30 groundwater samples from different aquifers in the Linhuan mining area, and the results showed that there was generally no direct hydraulic connection between the Taiyuan formation limestone water and other aquifers. Therefore, the analysis results of this Gibbs diagram are consistent with the research results of Chen et al…”

Hydrogeochemistry of Water in Coal Measures during Grouting Treatment of Taoyuan Mine, China

“…Thus far, the research on groundwater in Huaibei Coalfield has mainly focused on isotope geochemical characteristics, groundwater cycle tracing, elemental pollution degree of groundwater, and health risk assessments. A deep groundwater flow field was monitored based on stable isotope geochemical characteristics (Chen et al 2011). The water-rock interactions of deep groundwater in the Linhuan mining area and the characteristics of heavy metal content were analyzed using a Piper trigram and a Gibbs diagram (Lin et al 2016).…”

Hydrogeochemical Characteristics and Water–Rock Interactions of Coalbed-Produced Water Derived from the Dafosi Biogenic Gas Field in the Southern Margin of Ordos Basin, China

“…Since Craig [12] first proposed the linear relationship between the hydrogen and oxygen isotopes in global precipitation (δD = 8δ 18 O + 10) as the global meteoric water line (GMWL), hydrogen and oxygen isotopic compositions have been widely used in hydrogeochemical research [13], primarily to determine the sources of water and the types of and mechanisms underlying water-rock interactions [14,15]. The main types of water-rock interactions include ion exchange, calcite and dolomite precipitation, and the dissolution of silicates, gypsum, CO 2 , and evaporites [16][17][18].…”