期刊
GLOBAL AND PLANETARY CHANGE
卷 64, 期 1-2, 页码 53-68出版社
ELSEVIER
DOI: 10.1016/j.gloplacha.2008.09.001
关键词
palynology; palaeoclimate; late Cenozoic; Tian Shan
资金
- National Basic Research Program of China [2004CB720202]
- Chinese Academy of Sciences [KZCX2-YW-130]
- National Nature Science Foundation of China [40772115]
Thick Cenozoic deposits were shed into the foreland basin of the Tian Shan Range, providing great potential for understanding the relationship between tectonic history and paleoclimatic changes. In the present study, we compiled a pollen record for the interval 26.5-2.6 Ma based on a palynological analysis of a latest Oligocene-Pliocene stratigraphic sequence in the northern foreland basin of the Tian Shan. Our results indicate that a remarkable warm climate occurred at ca. 18-15 Ma ago, corresponding to the Mid-Miocene Climatic Optimum, while a change to an and climate occurred at 6 Ma, marked by an increase in the drought-tolerant herb taxa Artemisia and Chenopodiaceae. This latter change was coincident with the late Cenozoic climatic deterioration recorded at high latitudes in the Northern Hemisphere. These inferred climatic events are further supported by the results of principal component analysis of the pollen data, such records are important archives in reconstructing the paleoclimate of the Asian interior. (C) 2008 Elsevier B.V. All rights reserved.
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