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对青藏高原咸水湖蓬错、昂仁金错、打加错,淡水湖打加芒错、达格架温泉及各湖入湖支流阴、阳离子组成进行了分析.咸水湖阴离子以HCO-3、SO2-4为主,阳离子以Na+为主,属HCO3-SO4-Na和HCO3-Na型水;各湖支流及淡水湖阴离子以HCO-3或SO2-4为主,阳离子以Ca2+或Mg2+为主,属HCO3-Ca、HCO3-Ca-Mg、HCO3-Mg-Ca、HCO3-SO4-Ca、SO4-HCO3-Ca型水;达格架温泉阴离子以HCO-3为主,阳离子以Na+为主,属HCO3-Na型水.咸水湖主要受蒸发-结晶作用控制,各湖支流及淡水湖主要受碳酸盐岩风化控制,达格架温泉主要受热水-花岗岩作用控制.碳酸盐矿物沉淀时Ca2+优先Mg2+被移除,导致咸水湖具有较高的Mg2+/Ca2+比值.在阳离子组成端元贡献中,碳酸盐岩贡献最大(54%~79%),硅酸盐岩(13%~29%)和蒸发盐岩(4%~23%)次之,大气输入(3%~7%)最小.
The composition of anion and cation in tributaries of the lakes in the Saltwater Plateau of the Qinghai-Tibet Plateau was analyzed, such as the Panyu fault, the fault of the Yanren fault, 4, the main cation is Na +, which belongs to HCO3-SO4-Na and HCO3-Na type water; the anions in each lake and freshwater lake are dominated by HCO-3 or SO2-4, and the cation is dominated by Ca2 + or Mg2 + HCO3-Ca, HCO3-Ca-Mg, HCO3-Mg-Ca, HCO3-SO4-Ca and SO4-HCO3- -Na-type water.The lagoon is mainly controlled by the evaporation-crystallization process, and the tributaries and freshwater lakes are mainly controlled by the weathering of carbonate rocks, and the geothermal hot spring is mainly controlled by the hot water-granite.The Ca2 + Mg2 + was removed, resulting in a higher ratio of Mg2 + / Ca2 + in the lagoon.Carbonate contribution was the largest (54% -79%), silicate rock (13% -29%) and Evaporated rock salt (4% ~ 23%) followed by the smallest (3% ~ 7%) input.