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, Bowen; Zhang, Kexin; Hou, Yafei; Ji, Junhang; Wang, Jiaxuan; Yang, Yibo; Yang, Tinglu; Wang, Chaowen; Shen, Tianyi
通讯作者	Song, BW (通讯作者)
发表日期	2019
ISSN	0031-0182
EISSN	1872-616X
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.
关键词	ALTYN-TAGH FAULT FISSION-TRACK EVIDENCE RESOLUTION MAGNETO STRATIGRAPHY EASTERN KUNLUN MOUNTAINS TECTONIC EVOLUTION QILIAN SHAN NW CHINA NORTHEASTWARD GROWTH GEOLOGIC EVOLUTION QINGHAI PROVINCE
英文关键词	Detrital zircon geochronology; Paleogeography; Tibetan Plateau; South Qilian; North Altyn Tagh
语种	英语
WOS研究方向	Physical Geography ; Geology ; Paleontology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:000487174100018
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259461
推荐引用方式 GB/T 7714	Song, Bowen,Zhang, Kexin,Hou, Yafei,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]. 中国科学院青藏高原研究所,2019,533.
APA	Song, Bowen.,Zhang, Kexin.,Hou, Yafei.,Ji, Junhang.,Wang, Jiaxuan.,...&Shen, Tianyi.(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, Bowen,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).