Polyhalite （K2SO4·MgSO4·2CaSO4·2H2O） is one of the widely distributed potash minerals. It is found in nearly all potash deposits of the sulphate type in Sichuan, Hubei and Shandong provinces. The stud...Polyhalite （K2SO4·MgSO4·2CaSO4·2H2O） is one of the widely distributed potash minerals. It is found in nearly all potash deposits of the sulphate type in Sichuan, Hubei and Shandong provinces. The study on the formative conditions of polyhalite and the interrelation between polyhalite and soluble potash minerals becomes important for the present mineral exploration.展开更多
As the thickness of the overburden increases, the temperature of the evaporites gradually rises, and the primary hydrous minerals tend to dihydrate and incongruently melt to form new mineral assemblages. This process ...As the thickness of the overburden increases, the temperature of the evaporites gradually rises, and the primary hydrous minerals tend to dihydrate and incongruently melt to form new mineral assemblages. This process can be called geothermal metamorphism and can be clarified by polythermal diagram of stable equilibrium. When we studied the geothermal metamorphism of some salt paragenesis in China, we展开更多
文摘Polyhalite （K2SO4·MgSO4·2CaSO4·2H2O） is one of the widely distributed potash minerals. It is found in nearly all potash deposits of the sulphate type in Sichuan, Hubei and Shandong provinces. The study on the formative conditions of polyhalite and the interrelation between polyhalite and soluble potash minerals becomes important for the present mineral exploration.
文摘As the thickness of the overburden increases, the temperature of the evaporites gradually rises, and the primary hydrous minerals tend to dihydrate and incongruently melt to form new mineral assemblages. This process can be called geothermal metamorphism and can be clarified by polythermal diagram of stable equilibrium. When we studied the geothermal metamorphism of some salt paragenesis in China, we
