Towards a clarification of the provenance of Cenozoic sediments in the northern Qaidam Basin

doi:10.1130/L1037.1

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院新生代地质与环境重点实验室

	Towards a clarification of the provenance of Cenozoic sediments in the northern Qaidam Basin
	Lu, Haijian 1; Ye, Jiacan 1,2; Guo, Licheng 3,4; Pan, Jiawei 1; Xiong, Shangfa 3,4; Li, Haibing 1
刊名	LITHOSPHERE
	2019-04-01
卷号	11 期号:2 页码:252-272
ISSN号	1941-8264
DOI	10.1130/L1037.1
英文摘要	Determining the provenance of sedimentary basin fill in the northern Qaidam Basin is a key step toward understanding the sedimentary system dynamics and mountain-building processes of the surrounding orogenic belts in Tibet. The exceptionally thick (average of 6-8 km) Cenozoic fluvio-lacustrine deposits in the northern Qaidam Basin were once thought to have been eroded from the nearby northern Qaidam Basin margin and the southern Qilian Shan and to reflect the prolonged thrust-related exhumation of these orogenic belts. However, several recent studies, based mainly on paleocurrent and detrital zircon U-Pb age data, suggested that they were derived from the distant East Kunlun Shan to the south, or the Qimen Tagh to the southwest (at least 200 and 350 km from the northern Qaidam Basin, respectively). That model assumed that the East Kunlun Shan and Qimen Tagh formed significant topographic barriers during the earliest sedimentation of Cenozoic strata (e.g., the Lulehe Formation) in the northern Qaidam Basin. Therefore, the tectonic significance of the provenance of the Lulehe Formation remains a fundamental problem in understanding the postcollisional uplift history of the northern Tibetan Plateau. To address this issue, we conducted sedimentological and paleocurrent analyses of the Lulehe Formation and detrital zircon U-Pb dating of Mesozoic strata in the northern Qaidam Basin. The results, in combination with existing paleocurrent and seismic reflection data, collectively indicate that although the source area cannot be specified by matching zircon U-Pb ages in sedimentary rocks with crystalline basement source rocks, other evidence points consistently to a unified proximal northerly source area (the northern Qaidam Basin margin and the southern Qilian Shan). Our results emphasize that noncrystalline basement rocks (e.g., Mesozoic sedimentary rocks) in fold-and-thrust belts should be taken into consideration when seeking potential source areas by correlating zircon U-Pb ages of siliciclastic detritus with related basement rocks. In addition, this study strongly supports the claim that variations in the proportions of age populations should be used with caution when determining source terrane by comparisons of age distributions.
资助项目	National Natural Science Foundation of China[41472187] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA19050104] ; China Geological Survey[DD20160022-03]
WOS关键词	ALTYN-TAGH FAULT ; ZIRCON U-PB ; QINGHAI-TIBET PLATEAU ; TECTONIC EVOLUTION ; FISSION-TRACK ; GEOLOGIC EVOLUTION ; CHINA IMPLICATIONS ; KUNLUN MOUNTAINS ; SOUTHERN TIBET ; HEXI CORRIDOR
WOS研究方向	Geochemistry & Geophysics ; Geology
语种	英语
出版者	GEOLOGICAL SOC AMER, INC
WOS记录号	WOS:000461962000004
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; China Geological Survey ; China Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; China Geological Survey ; China Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; China Geological Survey ; China Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; China Geological Survey ; China Geological Survey
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/91072]
专题	地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者	Lu, Haijian
作者单位	1.Chinese Acad Geol Sci, Inst Geol, Minist Nat Resources, Key Lab Deep Earth Dynam, Beijing 100037, Peoples R China 2.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China 4.Univ Chinese Acad Sci, Beijing 10049, Peoples R China
推荐引用方式 GB/T 7714	Lu, Haijian,Ye, Jiacan,Guo, Licheng,et al. Towards a clarification of the provenance of Cenozoic sediments in the northern Qaidam Basin[J]. LITHOSPHERE,2019,11(2):252-272.
APA	Lu, Haijian,Ye, Jiacan,Guo, Licheng,Pan, Jiawei,Xiong, Shangfa,&Li, Haibing.(2019).Towards a clarification of the provenance of Cenozoic sediments in the northern Qaidam Basin.LITHOSPHERE,11(2),252-272.
MLA	Lu, Haijian,et al."Towards a clarification of the provenance of Cenozoic sediments in the northern Qaidam Basin".LITHOSPHERE 11.2(2019):252-272.