气候变化领域集成服务门户(CCPortal): New insights into the provenance of Cenozoic strata in the Qaidam Basin; northern Tibet: Constraints from combined U-Pb dating of detrital zircons in recent and ancient fluvial sediments

CCPortal

DOI	10.1016/j.palaeo.2019.109254
	New insights into the provenance of Cenozoic strata in the Qaidam Basin; northern Tibet: Constraints from combined U-Pb dating of detrital zircons in recent and ancient fluvial sediments
	Song B.; Zhang K.; Hou Y.; Ji J.; Wang J.; Yang Y.; Yang T.; Wang C.; Shen T.
发表日期	2019
ISSN	0031-0182
卷号	533
英文摘要	Determining the provenance of Cenozoic strata in the Qaidam Basin is key to understanding the basin-mountain coupling history in the northern Tibetan Plateau (TP). However, the specific source areas of Cenozoic strata in the northern Qaidam Basin remain highly debated. Here, we combine analyses of detrital zircons U&Pb geochronology for recent and ancient fluvial sediments from the northern Qaidam Basin to trace source areas of Cenozoic strata and reconstruct related mountain-building processes. The results indicate that the diagnostic 270–240 Ma zircon U&Pb peak, which was previously recognized as the unique input of a southern source area, is widespread in the recent fluvial sediments of the northern Qaidam Basin. Given our new zircon U&Pb data, the source-to-sink transport processes of Cenozoic sediments in the northern Qaidam Basin can be summarized as follows. (1) The northern Qaidam Basin has received the eroded detrital material from a dominantly northern source throughout the Cenozoic. (2) The Qaidam BeiShan was uplifted already at least by the early Eocene and served as the single contributor of detritus to the Dahonggou (DHG) region, suggesting that far-field stress due to the India-Asia collision had been propagated to this region as early as the early Eocene. (3) An abrupt change in provenance is observed in the DHG region during 46.5–43.7 Ma. We interpret this middle Eocene source change as reflecting the onset of growth of the North Altyn Tagh Range, implying that the North Altyn Tagh Range was already serving as an important source area for the DHG region by the middle Eocene. (4) The South Qilian Range served again as the dominant source area for the DHG region after 24.6 Ma. The shift in provenance from the North Altyn Tagh Range to the South Qilian Range can be attributed to the uplift of the Saishiteng Shan. © 2019 Elsevier B.V.
英文关键词	Detrital zircon geochronology; North Altyn Tagh; Paleogeography; South Qilian; Tibetan Plateau
语种	英语
scopus关键词	Cenozoic; detrital deposit; Eocene; Eurasian plate; geochronology; Indian plate; paleogeography; provenance; sequence stratigraphy; uranium-lead dating; zircon; Altun Mountains; China; Qaidam Basin; Qilian Mountains; Qinghai; Qinghai-Xizang Plateau
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150826
作者单位	Institute of Geological Survey, China University of Geosciences, Wuhan, 430074, China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China; School of Earth Sciences, China University of Geosciences, Wuhan, 430074, China; Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, 100101, China; School of Earth Sciences, East China University of Technology, Nanchang, 330013, China; Gemological Institute, China University of Geosciences, Wuhan, 430074, China
推荐引用方式 GB/T 7714	Song B.,Zhang K.,Hou Y.,et al. New insights into the provenance of Cenozoic strata in the Qaidam Basin; northern Tibet: Constraints from combined U-Pb dating of detrital zircons in recent and ancient fluvial sediments[J],2019,533.
APA	Song B..,Zhang K..,Hou Y..,Ji J..,Wang J..,...&Shen T..(2019).New insights into the provenance of Cenozoic strata in the Qaidam Basin; northern Tibet: Constraints from combined U-Pb dating of detrital zircons in recent and ancient fluvial sediments.Palaeogeography, Palaeoclimatology, Palaeoecology,533.
MLA	Song B.,et al."New insights into the provenance of Cenozoic strata in the Qaidam Basin; northern Tibet: Constraints from combined U-Pb dating of detrital zircons in recent and ancient fluvial sediments".Palaeogeography, Palaeoclimatology, Palaeoecology 533(2019).