Late Cenozoic central Asian drying inferred from a palynological record from the northern Tian Shan
Late Cenozoic central Asian drying inferred from a palynological record from the northern Tian Shan
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根据北天山孢粉学记录推断晚新生代中亚干燥
DOI：
10.1016/j.epsl.2010.12.042
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发表时间：
2011-02
影响因子：
5.3
通讯作者：
Wang, Xu
中科院分区：
文献类型：
--
作者：
Luo, Pan;Ding, Zhongli;White, Paul D.;Dong, Xinxin;Ji, Junliang;Tang, Zihua;Jiang, Hanchao;Wang, Xu
与大山相邻的盆地中所含的沉积物为重建中亚干旱化历史提供了机会。本文利用采自中国西北部北方天山的金沟河流域剖面的孢粉记录，重建了晚新生代中亚地区的干旱化过程。生物地磁结果表明，该剖面在28 ~ 4.2Ma之间为连续沉积。孢粉记录结合主成分分析和多样性指数表明，亚洲中部在渐新世晚期为湿润状态，在23.8-23.3Ma时为干旱状态。17.3Ma之前一直处于干旱状态，16.2Ma时进入相对湿润阶段，13.5Ma时又开始增加，并达到一个高峰，持续到中新世晚期和上新世早期。将干旱化过程与全球气温趋势和构造历史进行比较，我们认为中亚地区的长期干旱趋势以新生代晚期降温为主，而发生在23.8-23.3Ma和16.2-13.5Ma的干旱事件更有可能与区域性造山运动有关。陆地-海洋再分配使干燥过程进一步复杂化。
Sediments contained in basins adjacent to great mountains provide opportunities to reconstruct the aridification history of central Asia. Here we use a palynological record from the fluviolucustrine Jingou River section collected from the northern Tian Shan, NW China, to reconstruct aridification in central Asia during the late Cenozoic. Biogeomagnetic results show that the section was continuously deposited through the interval 28–4.2Ma. The palynological record, with the auxiliary of the principal component analysis and the diversity index, indicates that a late Oligocene wet condition existed in central Asia and shifted to dry conditions at 23.8–23.3Ma. The dry condition remained until 17.3Ma and subsequently ameliorated to a relatively wet stage to 16.2Ma, but then began to increase once again and reached a peak at 13.5Ma that last throughout the late Miocene and the early Pliocene. Comparing the aridification process to the global temperature trend and history of tectonics, we suggest that the long-term drying trend in central Asia is dominated by late Cenozoic cooling, while the dry events that occurred at 23.8–23.3Ma and 16.2–13.5Ma are more likely associated with regional mountain building. The land–sea redistribution further complicated the drying processes.
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影响因子：
5.3
作者：
Zhongshi Zhang;Huijun Wang;Zhengtang Guo;D. Jiang
通讯作者：
Zhongshi Zhang;Huijun Wang;Zhengtang Guo;D. Jiang
影响因子：
2.2
作者：
Y. Miao;Q. Meng;X. Fang;Xiaoli Yan;Fuli Wu;Chunhui Song
通讯作者：
Y. Miao;Q. Meng;X. Fang;Xiaoli Yan;Fuli Wu;Chunhui Song
影响因子：
2.4
作者：
Wei-Ming Wang
通讯作者：
Wei-Ming Wang
晚渐新世-中新世中纬度干旱化和亚洲内陆风型
影响因子：
5.8
作者：
Sun, Jimin;Ye, Jie;Meng, Jin
通讯作者：
Meng, Jin
影响因子：
--
作者：
P. Tapponnier;P. Molnar
通讯作者：
P. Tapponnier;P. Molnar