Carbon and oxygen isotopic constraints on paleoclimate and   paleoelevation of the southwestern Qaidam basin, northern Tibetan   Plateau

doi:10.1016/j.gsf.2016.12.001

CORC > 北京大学 > 地球与空间科学学院

	Carbon and oxygen isotopic constraints on paleoclimate and paleoelevation of the southwestern Qaidam basin, northern Tibetan Plateau
	Li, Lin-Lin ; Wu, Chao-Dong ; Fan, Chang-Fu ; Li, Ji-Jun ; Zhang, Chang-Hao
刊名	GEOSCIENCE FRONTIERS
	2017
关键词	Carbon and oxygen isotopes Northern Tibetan Plateau Qaidam basin Paleoelevation ALTYN-TAGH FAULT CENOZOIC TECTONIC EVOLUTION LOWER CRUSTAL FLOW MAGNETIC-SUSCEPTIBILITY LACUSTRINE CARBONATES MIOCENE SEDIMENTS HOLOCENE CLIMATE STABLE-ISOTOPES NORTHWEST CHINA SOUTHERN TIBET
DOI	10.1016/j.gsf.2016.12.001
英文摘要	We investigate the growth of the northern Tibetan Plateau and associated climate change by applying oxygen and carbon isotopic compositions in Cenozoic strata in the southwestern Qaidam basin. The X-ray diffraction and isotopic studies reveal that the carbonate minerals are mainly authigenic and they do not preserve any evidence for detrital carbonate and diagenesis. The isotope data show large fluctuations in the delta O-18 and delta C-13 values in the middle-late Eocene, indicating relatively warm and seasonal dry climate. The positive correlation of the delta O-18 and delta C-13 values in the Oligocene and the positive shift of the delta C-13 values from the Eocene to Oligocene suggest that the climate changed to arid in the Oligocene. However, the delta O-18 values show negative shift, which is closely related to the global cooling event. During the Miocene, the delta C-13 values vary between -2 parts per thousand and -4 parts per thousand, whereas the delta O-18 values show continuous negative shift. The mean delta O-18 values decrease from -8.5 parts per thousand in the early Miocene to -10.0 parts per thousand in the late Miocene. The stable isotope-based paleoaltimetry results suggest that the elevation of the southwestern Qaidam basinwas approximately 1500 m in the middle-late Eocene and Oligocene. Subsequently, during Miocene the crustal uplift process started and the elevation reached approximately 2000 m in the early Miocene and 2500 m in the late Miocene, which suggests large-scale growth of the northern Tibet Plateau during the Miocene. (C) 2017, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V.; National Science and Technology Major Project [2011ZX05009-001]; SCI(E); ARTICLE; 5; 1175-1186; 8
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/471236]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Li, Lin-Lin,Wu, Chao-Dong,Fan, Chang-Fu,et al. Carbon and oxygen isotopic constraints on paleoclimate and paleoelevation of the southwestern Qaidam basin, northern Tibetan Plateau[J]. GEOSCIENCE FRONTIERS,2017.
APA	Li, Lin-Lin,Wu, Chao-Dong,Fan, Chang-Fu,Li, Ji-Jun,&Zhang, Chang-Hao.(2017).Carbon and oxygen isotopic constraints on paleoclimate and paleoelevation of the southwestern Qaidam basin, northern Tibetan Plateau.GEOSCIENCE FRONTIERS.
MLA	Li, Lin-Lin,et al."Carbon and oxygen isotopic constraints on paleoclimate and paleoelevation of the southwestern Qaidam basin, northern Tibetan Plateau".GEOSCIENCE FRONTIERS (2017).