Groundwater From Abandoned Mines of the Partizansk Coal Basin, Primorye: Isotope-Geochemical Features of Composition and Regularities of Formation

International science and technology conference "Earth science"

Tarasenko, I.A.^1^2 ; Zinkov, A.V.^2 ; Vakh, E.A.^2 ; Nagornova, N.A.^2

Far East Geological Institute, Far East Branch of the Russian Academy of Sciences, Prospekt 100-letiya 159, Vladivostok

690022, Russia^1

Far East Federal University, 8 Sukhanova St., Vladivostok

690090, Russia^2

关键词: Compositional features;    Geochemical conditions;    Geochemical features;    Groundwater composition;    Industrial structures;    Nonequilibrium state;    Water rock interaction process;    Water rock interactions;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/272/3/032102/pdf
DOI  :  10.1088/1755-1315/272/3/032102

来源: IOP

【 摘 要 】

The underground waters from the abandoned mines of the Partizansk coal basin were subjected to isotope-geochemical study to investigate their compositional features and regularities of their formation. The study has shown that flooding of the mines caused origin in the natural and industrial structures of a succession of water solutions with changeable composition: HCO3-Ca→HCO3-Mg→HCO3-Na→HCO3-SO4-Na→SO4-Na. The sulfur variability here is conditioned by the amount and level of oxidation of pyrite inherent in coals, bacterial component is important as well. The natural and industrial structures under consideration demonstrate zonality of geochemical conditions. Deeper horizons are the place where aerobic systems transit into anaerobic ones, and predominantly deoxidizing environment stimulates generation of biochemical natural gases, such as CH4, H2S, CO2, and H2. It has been established also that transformation of groundwater composition influences the rare-earths behavior; distribution of the dissolved REE depends on the water type and is controlled by the water-rock interaction processes and equilibrium - non-equilibrium state. Mineralization of the waters under study correlates with δ1O and δD parameters, and variation of their values can be used for estimation of the water-rock interaction degree.