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通过对内蒙古岱海近0.5 ka以来沉积物中酸不溶物（AI）和清液（AS）87Sr/86Sr值的分别测定,结合其矿物组合、Rb/Sr值及CaCO3含量变化,表明小冰期以来岱海流域处于硅酸盐矿物早期风化阶段.在小冰期最盛期,沉积物中的硅酸盐和碳酸盐矿物的87Sr/86Sr值均呈明显峰值,反映流域经历的不利于硅酸盐中放射成因 Sr溶出的寒冷气候环境.同时,不同矿物相的87Sr/86Sr值变化也展示了小冰期后有助于化学风化的增暖气候.因此,内陆湖泊沉积物的硅酸盐和碳酸盐矿物的87Sr/86Sr值可作为古气候环境变化的有效代用指标.
Based on the determination of the 87Sr / 86Sr value of the acid-insoluble (AI) and supernatant (AS) in the sediments from the past 0.5 ka in Inner Mongolia, the combination of mineral assemblages, Rb / Sr and CaCO3 contents showed that since the Little Ice Age In the peak of the Little Ice Age, the 87Sr / 86Sr values of silicate and carbonate minerals in the sediments all show significant peaks, reflecting that the watersheds are not conducive to the formation of silicates The evolution of 87 Sr / 86 Sr values in different mineral phases also shows a warming climate that contributes to chemical weathering after the Little Ice Age. Therefore, the silicate and carbonate 87Sr / 86Sr values of salt minerals can be used as effective proxy indicators of paleoclimate and environmental changes.