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Understanding Miocene Climate Evolution in Northeastern Tibet: Stable Carbon and Oxygen Isotope Records from the Western Tianshui Basin, China
Hou, ZF (Hou, Zhanfang)[ 1,2,3,4 ]; Li, JJ (Li, Jijun)[ 2,3,5 ]; Song, CH (Song, Chunhui)[ 3,6 ]; Zhang, J (Zhang, Jun)[ 2,3 ]; Hui, ZC (Hui, Zhengchuang)[ 2,3 ]; Chen, SY (Chen, Shiyue)[ 7 ]; Xian, F (Xian, Feng)[ 1 ]
2014-04-15
Source PublicationJOURNAL OF EARTH SCIENCE
Volume25Issue:2Pages:357-365
Subtype期刊论文
Abstract

To investigate climate evolution during the Miocene, especially during the Middle Miocene climate transition on the northeastern Tibetan Plateau, stable oxygen and carbon isotopes of carbonates from a 288-m-thick lacustrine-fluvial sediment sequence covering the period from 17.1 to 6.1 Ma from Tianshui Basin, China, were analyzed. The relatively low stable oxygen isotope values indicate the prevalence of wet climate conditions during the period of 17.1-13.6 Ma, an interval corresponding to the well-known Middle Miocene Climate Optimum. The interval between 13.6 and 11.0 Ma (i.e., the late Middle Miocene) is marked by a progressive increase in the delta O-18 values, indicative of a decrease in precipitation, probably linked to the expansion of the East Antarctic Ice Sheet and global cooling since about 14 Ma. The climate in the study area continued to get drier as shown by the enrichment of the heavy oxygen isotope from 11 Ma. We attribute these stepwise climatic changes as revealed by our carbonate delta O-18 record from the northeastern Tibetan Plateau to the sustained global cooling that may have reduced moist transport to Central Asia, which in turn led to a permanent aridification.

DOI10.1007/s12583-014-0416-8
Indexed BySCIE
Language英语
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9725
Collection加速器质谱中心
Corresponding AuthorHou, ZF (Hou, Zhanfang)[ 1,2,3,4 ]
Affiliation1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment,Chinese Academy of Sciences, Xi’an 710054, China;
2.College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China;
3.MOE Key Laboratory of Western China’s Environmental Systems, Lanzhou University, Lanzhou 730000, China;
4.Graduate University of Chinese Academy of Sciences, Beijing 100039, China;
5.College of Geography Sciences, Nanjing Normal University, Nanjing 210097, China;
6.School of Earth Sciences, Lanzhou University, Lanzhou 730000, China;
7.College of Environment and Planning, Liaocheng University, Liaocheng 252000, China
Recommended Citation
GB/T 7714
Hou, ZF ,Li, JJ ,Song, CH ,et al. Understanding Miocene Climate Evolution in Northeastern Tibet: Stable Carbon and Oxygen Isotope Records from the Western Tianshui Basin, China[J]. JOURNAL OF EARTH SCIENCE,2014,25(2):357-365.
APA Hou, ZF .,Li, JJ .,Song, CH .,Zhang, J .,Hui, ZC .,...&Xian, F .(2014).Understanding Miocene Climate Evolution in Northeastern Tibet: Stable Carbon and Oxygen Isotope Records from the Western Tianshui Basin, China.JOURNAL OF EARTH SCIENCE,25(2),357-365.
MLA Hou, ZF ,et al."Understanding Miocene Climate Evolution in Northeastern Tibet: Stable Carbon and Oxygen Isotope Records from the Western Tianshui Basin, China".JOURNAL OF EARTH SCIENCE 25.2(2014):357-365.
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