利用氢氧同位素研究察尔汗地区古气候的变化特征

The Hydrogen, Oxygen Isotope Record of Salt Fluid Inclusions to Indicate the Paleoclimate of Qarhan Area

通过研究柴达木盆地察尔汗盐湖ＺＫ－８９０４钻孔中原生石盐包裹体水的氢、氧稳定同位素组成及其变化规律，结合钻孔的铀系法年龄数据，讨论了晚更新世末期以来该湖区水体和环境的变化。结果表明，近五万年来察尔汗湖区的气候经历了温暖干旱期、冰期、增温干旱期的演化模式，变化周期约二万年左右。

The oxygen,hydrogen isotopes of fluid inclusions contained in primary halite incore ZK-8904 were analysed and peleoclimate of pleistocene in Qarhan Salt Lake(west of China)wasdiscussed. The result showed that the paleoclimate of this area underwent three periods:warm dry,cold dry, warm dry climate during past 5. 0×10￣4(a,B. P.)The interval of the periods was abouttwenty thousand years.