IEECAS OpenIR  > 黄土与第四纪地质国家重点实验室(2010~)
Evidence for northeastern Tibetan Plateau uplift between 25 and 20 Ma in the sedimentary archive of the Xining Basin, Northwestern China
Xiao, GQ (Xiao, Guoqiao)[1,2]; Guo, ZT (Guo, Zhengtang)[3]; Dupont-Nivet, G (Dupont-Nivet, Guillaume)[4,5,6]; Lu, HY (Lu, Houyuan)[3]; Wu, NQ (Wu, Naiqin)[3]; Ge, JY (Ge, Junyi)[3]; Hao, QZ (Hao, Qingzhen)[3]; Peng, SZ (Peng, Shuzhen)[7]; Li, FJ (Li, Fengjiang)[3]; Abels, HA (Abels, Hemmo A.)[8]; Zhang, KX (Zhang, Kexin)[2]
2012-02-01
Source PublicationEARTH AND PLANETARY SCIENCE LETTERS
Volume317Pages:185-195
Subtype期刊论文
Abstract

The growth history of the Tibetan Plateau provides a valuable natural laboratory to understand tectonic processes of the India-Asia collision and their impact on and interactions with Asian and global climate change. However, both Tibetan Plateau growth and Asian paleoenvironments are generally poorly documented in pre-Pliocene times and reflect limited temporal coverage for different parts of the plateau. Here we present magnetostratigraphic results from the Xining Basin, at the NE margin of the Tibetan Plateau, precisely dating the record between the earliest Oligocene (similar to 33 Ma) to the middle Miocene (similar to 16 Ma). The pattern of observed paleomagnetic polarity zones is unequivocally correlated to the geomagnetic polarity time scale (GPTS) indicating relatively constant and low sediment accumulation rates (32 m/Myr) except for a peculiar period of unstable accumulation between 25.3 and 19.7 Ma. At the beginning of this interval, a marked permanent increase in magnetite content of the sediments is observed and likely relates to a change in provenance. We directly relate this unstable period of sediment accumulation and provenance change to the coeval exhumation recently reported by low-temperature thermochronology from the Laji Shan range, which subsequently formed the southern margin of the Xining Basin. Evidence for NE Tibet tectonism at 25-20 Ma can be associated with widespread deformation over the entire Himalayan-Tibetan orogen at this time, which may be linked to the coeval appearance of monsoon climate in Eastern Asia and the onset of central Asian desertification.

KeywordNe Tibet Magnetostratigraphy Tectonic Uplift Paleoclimate Sedimentary Provenance Xining Basin
Indexed BySCI ; EI
Language英语
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10121
Collection黄土与第四纪地质国家重点实验室(2010~)
Corresponding AuthorGuo, ZT (Guo, Zhengtang)[3]
Affiliation1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, P.O. Box 17, Xian, 710075, China;
2.State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China;
3.Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China;
4.Geociences Rennes UMR 6118-CRNS, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France;
5.Paleomagnetic Laboratory ‘Fort Hoofddijk’, Dept. of Earth Sciences, Utrecht University, Utrecht, The Netherlands;
6.Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education (Peking Unviersity), Beijing 100871, PR China;
7.Taishan College, Tai'an 271021, China;
8.Stratigraphy/Paleontology, Dept. of Earth Sciences, Utrecht University, Utrecht, The Netherlands
Recommended Citation
GB/T 7714
Xiao, GQ ,Guo, ZT ,Dupont-Nivet, G ,et al. Evidence for northeastern Tibetan Plateau uplift between 25 and 20 Ma in the sedimentary archive of the Xining Basin, Northwestern China[J]. EARTH AND PLANETARY SCIENCE LETTERS,2012,317:185-195.
APA Xiao, GQ .,Guo, ZT .,Dupont-Nivet, G .,Lu, HY .,Wu, NQ .,...&Zhang, KX .(2012).Evidence for northeastern Tibetan Plateau uplift between 25 and 20 Ma in the sedimentary archive of the Xining Basin, Northwestern China.EARTH AND PLANETARY SCIENCE LETTERS,317,185-195.
MLA Xiao, GQ ,et al."Evidence for northeastern Tibetan Plateau uplift between 25 and 20 Ma in the sedimentary archive of the Xining Basin, Northwestern China".EARTH AND PLANETARY SCIENCE LETTERS 317(2012):185-195.
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