摘要
This paper studies the mechanism of water-rock interaction in the Cretaceous aquifer of Ordos Desert Plateau. The result indicates that K-feldspar, plagioclase and carbonate minerals in hydrous media have different 87Sr/86Sr ratios and the 87Sr/86Sr ratios of groundwater are between 0.709 871 and 0.711 792. Sr in groundwater is primarily derived from carbonate minerals, sulfate minerals and plagioclase of silicate minerals. The main water-rock interactions include the carbonate mineral dissolution, sulfate mineral dissolution and silicate mineral dissolution in the Cretaceous aquifer of Ordos Desert Plateau.