横亘于青藏高原中部的分水岭山脉(横断山-唐古拉山-喀喇昆仑山)是太平洋水系(黄河、长江、澜沧江)和印度洋水系(怒江、伊洛瓦底江、雅鲁藏布江、印度河)的分水岭,是世界屋脊的“脊梁”(图1),其形成、隆升对青藏高原乃至整个东亚的古地理格局都有重要影响。横断山作为青藏高原分水岭山脉的东段,纵贯于青藏高原东南缘,海拔高度从南向北不断上升,是南亚季风暖湿水汽顺势北上的重要通道,其独特的生态环境也让横断山演化为世界生物多样性的热点地区。
该研究成果获得国家自然科学基金(41490615)、国家重点研发计划(2016YFC0600303)、中国科学院战略性先导科技专项(XDA20070301)和第二次青藏高原综合科学考察研究(2019QZKK0708)的联合资助。青藏高原所博士生熊中玉、丁林院士分别为论文第一作者和通讯作者,合作者还包括中科院地质与地球物理所王旭副研究员、英国开放大学Robert Spicer教授、布里斯托大学Alexander Farnsworth博士和Paul Valdes教授、中科院西双版纳热带植物园苏涛研究员以及青藏高原所张清海、张利云、蔡福龙、王厚起、李震宇、宋培平、郭旭东和岳雅慧等人。
论文信息:Xiong, Z.Y., Ding, L.*, Spicer, A., Farnsworth A., Wang X., Valdes P., Su T., Zhang Q., Zhang L., Cai F., Wang H., Li Z., Song P., Guo X., Yue Y., 2020. The early Eocene Rise of the Gonjo Basin, SE Tibet: from Low Desert to High Forest. Earth and Planetary Science Letters, 543: 116312.
原文链接:http://doi.org/10.1016/j.epsl.2020.116312
![](http://www.itpcas.ac.cn/kycg/yjcg/202005/W020200528650059967007.png)
图1 青藏高原分水岭山脉及印度洋-太平洋水系范围
![](http://www.itpcas.ac.cn/kycg/yjcg/202005/W020200528650060252326.png)
图2 (A)贡觉盆地古高度结果及棕榈化石;(B)青藏高原分水岭山脉现有古高度结果(Xu et al., 2013; Li et al., 2018; Su et al., 2018)
![](http://www.itpcas.ac.cn/kycg/yjcg/202005/W020200528650060401607.png)
图3 青藏高原5500-5000万年和4400-4000万年间古地理格局演化(综合本文数据并参考Ding et al., 2014; Valdes et al., 2019)
参考文献:
Ding, L., Xu, Q., Yue, Y., Wang, H., Cai, F., Li, S., 2014. The Andean-type Gangdese Mountains: Paleoelevation record from the Paleocene-Eocene Linzhou Basin. Earth and Planetary Science Letters, 392: 250-264.
Li, L., Fan, M., Davila, N., Jesmok, G., Mitsunaga, B., Tripati, A., Orme, D., 2018. Carbonate stable and clumped isotopic evidence for late Eocene moderate to high elevation of the East-central Tibetan Plateau and its geodynamic implications. Geological Society of America Bulletin, 131: 831–844.
Su, T., Spicer, R.A., Li, S., et al., 2018. Uplift, climate and biotic changes at the Eocene-Oligocene transition in Southeast Tibet. National Science Review, 6 (3): 495-504.
Valdes, P.J., Lin, Ding, Farnsworth, A., Spicer, R.A., Li, S.-H., Tao, S., 2019. Comment on “Revised paleoaltimetry data show low Tibetan Plateau elevation during the Eocene”. Science, 365 (6459): eaax8474.
Xu, Q., Ding, L., Zhang, L., Cai, F., Lai, Q., Yang, D., Jing, L.Z., 2013. Paleogene high elevations in the Qiangtang Terrane, central Tibetan Plateau. Earth and Planetary Science Letters, 362: 31-42.