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亚洲内陆干旱区是连接赤道和中高纬地区的过渡地带,也是西风气候和季风气候的相互作用区,其形成演化与青藏高原的隆起和全球变化等因素密切相关。因此,揭示其干旱化过程和趋势具有重大的理论和现实意义。文章对来自柴达木盆地察汗斯拉图干盐湖的深钻SG-1孔沉积物进行了初步的碳酸盐碳氧同位素测试与分析,结果清晰地指示了柴达木盆地自1.0Ma以来的持续干旱化及约0.6Ma以来的加速干旱化过程,我们认为1.0Ma以来的持续干旱化可能是全球气候变化和构造活动共同作用的结果,而约0.6Ma以来的加速干旱化可能是昆黄运动所导致的高原北部强烈隆升和区域环流系统变化或强化所造成的。
The inland arid zone in Asia is a transitional zone connecting the equatorial and mid-high latitudes. It is also an interaction zone between westerly and monsoon climates. Its formation and evolution are closely related to the uplift and global changes of the Qinghai-Tibet Plateau. Therefore, to reveal its process and trend of aridification has great theoretical and practical significance. In this paper, preliminary carbonate carbon and oxygen isotope measurements and analyzes of deep-seated SG-1 sediments from Chahanseto Tugan Lake in the Qaidam Basin were conducted. The results clearly indicate that since the 1.0 Ma And the accelerated drought process since about 0.6Ma, we think that the continuous drought since 1.0Ma may be the result of the joint action of global climate change and tectonic activity, while the accelerated drought since 0.6Ma may be Kunming Movement caused by the intense uplift of the northern plateau and the regional circulation system changes or intensification caused.