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Rock magnetic constraints for the Mid-Miocene Climatic Optimum from a high-resolution sedimentary sequence of the northwestern Qaidam Basin, NE Tibetan Plateau
Guan, Chong1,5; Chang, Hong3,4,5; Yan, Maodu1,2,5; Li, Leyi3,5; Xia, Mengmeng6; Zan, Jinbo1,2,5; Liu, Shuangchi7
2019-10-15
Source PublicationPALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
Volume532Pages:12
AbstractThe thick sequence of Cenozoic deposits in the Qaidam Basin of the NE Tibetan Plateau has great potential for understanding the tectonic and climatic evolution of the region. In this study, we performed detailed rock magnetic analyses of a well-dated (similar to 20.7-11.2 Ma) Upper Cenozoic sedimentary sequence from the Huatugou (HTG) section in the NW Qaidam Basin. The magnetic susceptibility of the sequence is relatively low before 17.4 Ma, high during 17.4-14.5 Ma, and lower after 14.5 Ma again. This pattern is consistent with the occurrence of the Mid-Miocene Climatic Optimum (MMCO) during 17.4-14.5 Ma, with global climatic cooling thereafter. Measurements of multiple rock magnetic parameters indicate a peak in the concentration of fine-grained magnetic minerals during 17.4-14.5 Ma. This feature demonstrates that the enhancement of the magnetic susceptibility is due to the pedogenic production of superparamagnetic (SP) and single domain (SD) magnetite, suggesting the occurrence of relatively high effective precipitation and high temperature in the Qaidam Basin at this time. Comparing with regional and global climatic records, the warm and humid climatic conditions coincide with the MMCO, implying that global climate changes were responsible for the climatic evolution in the Qaidam Basin throughout the MMCO. However, after 14.5 Ma, the rapid uplift of the northern Tibetan Plateau caused it to reach a critical elevation which blocked the moisture supply to the Qaidam Basin and may also have contributed to the observed climatic changes.
KeywordGlobal warming event Magnetic susceptibility Pedogenic model Paleoenvironment Global climate changes
DOI10.1016/j.palaeo.2019.109263
Funding OrganizationNational Basic Research Program of China ; National Basic Research Program of China ; Second Tibetan Plateau Scientific Expedition and Research program ; Second Tibetan Plateau Scientific Expedition and Research program ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Basic Research Program of China ; National Basic Research Program of China ; Second Tibetan Plateau Scientific Expedition and Research program ; Second Tibetan Plateau Scientific Expedition and Research program ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Basic Research Program of China ; National Basic Research Program of China ; Second Tibetan Plateau Scientific Expedition and Research program ; Second Tibetan Plateau Scientific Expedition and Research program ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Basic Research Program of China ; National Basic Research Program of China ; Second Tibetan Plateau Scientific Expedition and Research program ; Second Tibetan Plateau Scientific Expedition and Research program ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC)
WOS KeywordCHINESE LOESS PLATEAU ; CENOZOIC TECTONIC EVOLUTION ; CENTRAL-ASIA ; CONTINUOUS ARIDIFICATION ; TAGH RANGE ; UPLIFT ; GROWTH ; SUSCEPTIBILITY ; DEPOSITS ; RECORD
Language英语
Funding ProjectNational Basic Research Program of China[2017YFC0602803] ; Second Tibetan Plateau Scientific Expedition and Research program[2019QZKK0707] ; National Natural Science Foundation of China (NSFC)[41572166] ; National Natural Science Foundation of China (NSFC)[41420104008] ; National Natural Science Foundation of China (NSFC)[41620104002]
Funding OrganizationNational Basic Research Program of China ; National Basic Research Program of China ; Second Tibetan Plateau Scientific Expedition and Research program ; Second Tibetan Plateau Scientific Expedition and Research program ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Basic Research Program of China ; National Basic Research Program of China ; Second Tibetan Plateau Scientific Expedition and Research program ; Second Tibetan Plateau Scientific Expedition and Research program ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Basic Research Program of China ; National Basic Research Program of China ; Second Tibetan Plateau Scientific Expedition and Research program ; Second Tibetan Plateau Scientific Expedition and Research program ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Basic Research Program of China ; National Basic Research Program of China ; Second Tibetan Plateau Scientific Expedition and Research program ; Second Tibetan Plateau Scientific Expedition and Research program ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC)
WOS Research AreaPhysical Geography ; Geology ; Paleontology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS IDWOS:000484871600009
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/93582
Collection岩石圈演化国家重点实验室
Corresponding AuthorChang, Hong
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, CAS Key Lab Continental Collis & Plateau Uplift, Beijing 100101, Peoples R China
2.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
3.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian 710061, Shaanxi, Peoples R China
4.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Shaanxi, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
6.Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China
7.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Guan, Chong,Chang, Hong,Yan, Maodu,et al. Rock magnetic constraints for the Mid-Miocene Climatic Optimum from a high-resolution sedimentary sequence of the northwestern Qaidam Basin, NE Tibetan Plateau[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2019,532:12.
APA Guan, Chong.,Chang, Hong.,Yan, Maodu.,Li, Leyi.,Xia, Mengmeng.,...&Liu, Shuangchi.(2019).Rock magnetic constraints for the Mid-Miocene Climatic Optimum from a high-resolution sedimentary sequence of the northwestern Qaidam Basin, NE Tibetan Plateau.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,532,12.
MLA Guan, Chong,et al."Rock magnetic constraints for the Mid-Miocene Climatic Optimum from a high-resolution sedimentary sequence of the northwestern Qaidam Basin, NE Tibetan Plateau".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 532(2019):12.
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