李春晓,叶捷,付娇,邢路达,郭丁歌,王世骐

• 1:中国科学院大学
• 2:中国科学院古脊椎动物与古人类研究所中国科学院脊椎动物演化与人类起源重点实验室

摘要(Abstract)：

准噶尔盆地北缘新生代地层保存了晚渐新世至晚中新世连续的地层序列和丰富的哺乳动物化石,长期以来一直是中亚陆相地层研究的经典区域。本研究重点聚焦乌伦古河流域晚渐新世至晚中新世连续沉积剖面,通过整合岩石地层、生物地层与高精度磁性地层数据,重新厘定铁尔斯哈巴合组、索索泉组、哈拉玛盖组、可可买登组和顶山盐池组的地层界限,构建了25 Ma至6 Ma的综合年代地层框架。16个化石层位系统记录了晚渐新世塔奔布鲁克期至晚中新世保德期的哺乳动物群演替序列。区域沉积环境由水成沉积向风成堆积及河湖相沉积的转变,既反映了局部构造作用对沉积过程的调控,也与全球气候事件高度吻合。青藏高原阶段性隆升和副特提斯海退却的协同作用加速了区域干旱化进程,为准噶尔盆地北缘的生态演化提供了重要背景。研究成果完善了中国北方地区哺乳动物年代地层对比标准,为重建新生代古环境演变、探讨青藏高原隆升与亚洲内陆干旱化机制提供了关键地层学证据。

关键词(KeyWords)： 准噶尔盆地;晚新生代;生物地层;哺乳动物化石;环境演变

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目(2023YFF0804501);; 国家自然科学基金(42402025、42472004、42430207);; 中国博士后科学基金面上项目(2024M753179)共同资助

作者(Author): 李春晓,叶捷,付娇,邢路达,郭丁歌,王世骐

DOI: 10.19839/j.cnki.dcxzz.2025.0031

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