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索尔库里盆地位于青藏高原东北缘,柴达木盆地的北部,气候恶劣、交通不便,研究资料匮乏。通过对索尔库里北盆地彩虹沟剖面新近纪中后期沉积物的古地磁测年和碳酸盐碳氧同位素质谱分析,揭示了索尔库里盆地13.5~2.5 Ma长序列气候演变过程。13.5~9.2 Ma时期相对冷干,9.2~5.3 Ma时期相对温湿,5.3~3.9 Ma时期相对暖湿,3.9~2.5 Ma时期再次转为冷干。11 Ma左右,青藏高原东北缘隆升到阻止印度洋暖湿气流向北方运输的高度,地处走滑盆地的索尔库里地区逐渐变得极其干旱,标志着亚洲内陆干旱化在此背景下开始。红粘土磁化率和碳氧同位素变化等证据显示,西风在本区贯穿始终,而季风的出现加剧了亚洲内陆古气候的干湿更迭,对区域及全球古气候重建具有重要意义。
The Soolcuri Basin is located in the northeastern margin of the Qinghai-Tibet Plateau and north of the Qaidam Basin. The weather is poor and traffic is inconvenient, and the research data are scarce. By paleomagnetic dating and carbonate carbon-oxygen isotope mass spectrometry analysis of the sediments in the middle and later Neocene of the Caixinggou section of the Sokolli Basin, the long-term climate evolution in the Shoolkur Basin was revealed. Relatively dry in the period from 13.5 to 9.2 Ma, relatively warm and humid in 9.2 to 5.3 Ma, relatively warm and humid in 5.3 to 3.9 Ma, and cold again in 3.9 to 2.5 Ma. Around 11 Ma, the northeastern margin of the Qinghai-Tibet Plateau uplifted to prevent the warm and humid flow of Indian Ocean from going north to the north. The Sokolli area, which is located in the slip-slide basin, became extremely arid, marking an inland aridification in Asia. Against this backdrop Start. The evidence of red clay susceptibility and carbon and oxygen isotope variation shows that the westerly wind runs through the region and the onset of the monsoon exacerbates the wet and dry alternations of the paleoclimate in Asia and is of great significance to regional and global paleoclimate reconstruction.