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Late Middle Jurassic aridification event in the Qaidam Basin, Northwest China: palynological and geochemical evidences

文献类型：期刊论文

作者Xie, Wen-Quan6; Wang, Wen-Hui5,6; Tan, Jing-Qiang6; Liu, Zhao-Jun4; Wang, Yong6; Song, Xue-Qi6; Mansour, Ahmed1,2,3
刊名PALAEOWORLD
出版日期2024-08-01
卷号33期号:4页码:1044-1064
关键词Shimengou Formation Climatic transition Palynoflora turnover Chemical weathering Lake salinization
ISSN号1871-174X
DOI10.1016/j.palwor.2023.06.002
通讯作者Wang, Wen-Hui(whwang@csu.edu.cn)
英文摘要Jurassic is characterized by a highly fluctuating climate. During the late Middle to Late Jurassic, Northwest China, including the Qaidam Basin, underwent a major climate transition from humid to arid conditions. In this study, we focused on the climate transitional interval (Bathonian Stage, Jurassic) and conducted high-resolution palynological and geochemical analysis to constrain more accurately this aridification event. We found that at the uppermost part of the Middle Jurassic Shimengou Formation, the relative abundance of Classopollis pollen increases along with a dramatic drop in the chemical index of alteration (CIA) and C-value, indicating a significant climate transition from humid to arid conditions during late Bathonian. Other geochemical proxy indicators, such as salinity and bulk carbonate carbon and oxygen isotopes, suggest the lacustrine environment of a closed saline lake. These significant changes indicate an environment of flourished xerophytic vegetation, weakened chemical weathering and enhanced lake salinization in the Qaidam Basin during late Bathonian, a critical turning point of the late Middle Jurassic climate from humid to arid conditions in the area, instead of Callovian (the red bed) as previously suggested. (c) 2023 Elsevier B.V. and Nanjing Institute of Geology and Palaeontology, CAS. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
WOS关键词POLLEN ASSEMBLAGES ; SICHUAN BASIN ; CARBON ; PALEOCLIMATE ; EVOLUTION ; CLIMATE ; AREA ; PALEOGEOGRAPHY ; PROVENANCE ; VEGETATION
资助项目National Natural Science Foundation of China[41872151] ; National Natural Science Foundation of China[41772001] ; China Hunan Provincial Science &Technology Department[2017XK2029] ; Department of Natural Resources of Hunan Province, China[2022-5] ; State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences)[213120] ; Natural Science Foundation of Hunan Province[2021JJ30816] ; Natural Science Foundation of Hunan Province[2023JJ20063]
WOS研究方向Paleontology
语种英语
WOS记录号WOS:001266425600001
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; China Hunan Provincial Science &Technology Department ; Department of Natural Resources of Hunan Province, China ; State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences) ; Natural Science Foundation of Hunan Province
源URL[http://ir.nigpas.ac.cn/handle/332004/44003]  
专题中国科学院南京地质古生物研究所
通讯作者Wang, Wen-Hui
作者单位1.Minia Univ, Fac Sci, Geol Dept, Al Minya 61519, Egypt
2.Southwest Petr Univ, Sch Geosci & Technol, Chengdu 610500, Peoples R China
3.Southwest Petr Univ, State Key Lab Oil & Gas Reservoir Geol & Exploitat, Chengdu 610050, Peoples R China
4.Jilin Univ, Coll Earth Sci, Changchun 130061, Peoples R China
5.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
6.Cent South Univ, Minist Educ, Key Lab Metallogen Predict Nonferrous Met & Geol E, Changsha 410083, Peoples R China
推荐引用方式
GB/T 7714		 Xie, Wen-Quan,Wang, Wen-Hui,Tan, Jing-Qiang,et al. Late Middle Jurassic aridification event in the Qaidam Basin, Northwest China: palynological and geochemical evidences[J]. PALAEOWORLD,2024,33(4):1044-1064.
APA Xie, Wen-Quan.,Wang, Wen-Hui.,Tan, Jing-Qiang.,Liu, Zhao-Jun.,Wang, Yong.,...&Mansour, Ahmed.(2024).Late Middle Jurassic aridification event in the Qaidam Basin, Northwest China: palynological and geochemical evidences.PALAEOWORLD,33(4),1044-1064.
MLA Xie, Wen-Quan,et al."Late Middle Jurassic aridification event in the Qaidam Basin, Northwest China: palynological and geochemical evidences".PALAEOWORLD 33.4(2024):1044-1064.

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来源：南京地质古生物研究所

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