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A late Eocene palynological record from the Nangqian Basin, Tibetan Plateau: Implications for stratigraphy and paleoclimate
Yuan, Qin1,2,3; Vajda, Vivi4; Li, Qing-Kuan3; Fan, Qi-Shun1,2; Wei, Hai-Cheng1,2; Qin, Zhan-Jie1,2,3; Zhang, Xiang-Ru3; Shan, Fa-Shou1,2
2017-06-01
Source PublicationPALAEOWORLD
Volume26Issue:2Pages:369-379
SubtypeArticle
AbstractWith the uplifting, large-scale thrusting and striking of the Tibetan Plateau, several Paleogene intracontinental basins formed within the northern Tibetan Plateau (TP). Stratigraphical and paleoenvironmental studies of the sedimentary successions within these basins are critical for understanding Paleogene climatological changes in Eurasia. The Nangqian Basin, one of such basins, formed in the Yushu area of the northeastern Tibetan Plateau. A set of lacustrine sediments, dominated by red clasolite, marlite, and gypsum, developed in the Yang Ala section in this basin. Paleontological records from the Nangqian Basin remain poorly known. Here, we investigate the palynological assemblages of one sedimentary succession at the Yang Ala section that belongs to the Gongjue Formation, and their implications regarding the geological age and paleoclimate are discussed. The results reveal that the assemblages are dominated mainly by angiosperm pollen (tricolpates and tricolporate), including Nitrariadites (Pokrovskaja), Quercoidites, and Labitricolpites, followed by gymnosperm pollen taxa, such as Ephedripites and Taxodiaceaepollenites, and sparse pteridophyte-spores produced by ferns. A late Eocene age is inferred based on palynostratigraphy and comparison with other pollen assemblages in the TP. A relatively dry climate with brief humid periods is indicated by the high abundance of xerophytic pollen taxa, such as Ephedripites and Nitrariadites, which are associated with broadleaved deciduous and evergreen plants. The characteristics of the pollen assemblages from the studied Yang Ala section are consistent with other Cenozoic palynofloras from the Mahalagou Formation in the Xining Basin and with those of the Yaxicuo Group in the Hoh Xil Basin. These results provide an improved stratigraphical scheme for parts of the Cenozoic and enrich the current knowledge of the vegetation history of the northeastern Tibetan Plateau. (C) 2016 Elsevier B.V. and Nanjing Institute of Geology and Palaeontology, CAS. All rights reserved.
KeywordPalynology Tibetan Plateau Stratigraphy Late Eocene Paleoclimate
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS KeywordWESTERN QAIDAM BASIN ; ASIAN SUMMER MONSOON ; OLIGOCENE CLIMATE TRANSITION ; HOH XIL BASIN ; NORTHWEST CHINA ; MODERN POLLEN ; GENUS FUPINGOPOLLENITES ; XINING BASIN ; TARIM BASIN ; UPLIFT
Indexed BySCI ; ISTP
Language英语
WOS Research AreaPaleontology
WOS SubjectPaleontology
WOS IDWOS:000402828000012
Citation statistics
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/6222
Collection青海盐湖研究所知识仓储
盐湖地质与环境实验室
科研管理、支撑部门
Affiliation1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Comprehens & Highly Efficient Utilizat Sa, Xining 810008, Qinghai, Peoples R China
2.Key Lab Salt Lake Geol & Environm Qinghai Prov, Xining 810008, Qinghai, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Swedish Museum Nat Hist, Stockholm, Sweden
Recommended Citation
GB/T 7714
Yuan, Qin,Vajda, Vivi,Li, Qing-Kuan,et al. A late Eocene palynological record from the Nangqian Basin, Tibetan Plateau: Implications for stratigraphy and paleoclimate[J]. PALAEOWORLD,2017,26(2):369-379.
APA Yuan, Qin.,Vajda, Vivi.,Li, Qing-Kuan.,Fan, Qi-Shun.,Wei, Hai-Cheng.,...&Shan, Fa-Shou.(2017).A late Eocene palynological record from the Nangqian Basin, Tibetan Plateau: Implications for stratigraphy and paleoclimate.PALAEOWORLD,26(2),369-379.
MLA Yuan, Qin,et al."A late Eocene palynological record from the Nangqian Basin, Tibetan Plateau: Implications for stratigraphy and paleoclimate".PALAEOWORLD 26.2(2017):369-379.
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