Accumulation pattern of groundwater containing Hydrogen Sulfide in the southern Junggar basin in China

Abstract

The surface water and groundwater flows from south to north to the interior basin in the midst of southern Junggar basin of China. The thick and loose gravel sand layer ware accumulated in the region, tectonic depressions of echelon arranged, tectonic depression or basement uplift, under the control of hydrodynamic block gas, provides a huge space of occurrence and migration for groundwater (Hydrogen Sulfide). The water rich sulfate and chloride, runoff along the direction, dissolution and leaching may occur in the infiltration and runoff process, under intense evaporation, the water of high Salinity may form of HCO₃-Ca-Na, HCO₃-SO₄-Na-Ca, Cl•SO₄-Na and HCO₃-SO₄-Cl-Na-K. The water rich SO₄^2-、Cl^-、Ca²⁺、Mg²⁺ and Na⁺ through the zone of hydrocarbon-rich (ΣCH, C), in the role of geothermal warming, under suitable geological conditions, the BSR or TSR may happen and the H₂S can generating, resulting concentration of calcium significantly lower and rich in hydrogen sulfide in water.