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Late Miocene magnetostratigraphy of Jianzha Basin in the northeastern margin of the Tibetan Plateau and changes in the East Asian summer monsoon
Fu, Chaofeng1,2; Qiang, Xiaoke2; Xu, Xinwen3; Xi, Jianjian1; Zuo, Jun1; An, Zhisheng2
2018-03-01
Source PublicationGEOLOGICAL JOURNAL
Volume53Issue:S1Pages:282-292
SubtypeArticle
AbstractJianzha Basin is located in the northeastern Tibetan Plateau (NETP) and contains a thick sequence of Cenozoic sediments that are an archive of information about the growth of the Tibetan Plateau and the evolution of the arid environment of the interior of Asia. Here, we present magnetostratigraphic and palaeoenvironmental records from a 361-m-thick sequence of Late Cenozoic eolian Red Clay and intercalated fluviolacustrine deposits in the Jianzha Basin. The magnetostratigraphic results show that the sediments have recorded a continuous geomagnetic polarity sequence from C5r.3r to C3r, spanning the interval from 11.8 to 5.8Ma in the Late Miocene. There are two intervals of rapidly fluctuating sedimentation rates between similar to 10 and similar to 6Ma, which we interpret as a response to a series of uplifts and expansions to the north and to the east in the NETP. The fluctuations in Rb/Sr ratio and magnetic susceptibility before similar to 8.57Ma reflect intensified East Asian summer monsoon (EASM) precipitation which resulted from the growth of the NETP. From similar to 8.57 to similar to 7.21Ma, the EASM was impacted by global cooling and ice build-up in the Northern Hemisphere in addition to the uplift of the Tibetan Plateau (TP) in the Late Miocene. From similar to 8.57 to similar to 7.21Ma, there is a lack of coherency between the fluctuations in MS and Rb/Sr ratio; however, subsequently, there is significant coherency between the Rb/Sr ratio and the deep-sea oxygen isotope record present. This suggests that from similar to 8.57Ma, the eolian Red Clay sediments in the Jianzha Basin were significantly affected by the addition of dust derived from the deforming and uplifting areas of the TP.
KeywordEast Asian Summer Monsoon Jianzha Basin Late Miocene Magnetostratigraphy Northeast Tibet Plateau
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1002/gj.3047
WOS KeywordCHINESE LOESS PLATEAU ; LAST 130,000 YEARS ; MAGNETIC-SUSCEPTIBILITY ; CLIMATE-CHANGE ; PALEOCLIMATIC IMPLICATIONS ; ENVIRONMENTAL-CHANGES ; GEOCHEMICAL RECORDS ; PALEOSOL SEQUENCES ; INDIAN MONSOON ; MIDDLE MIOCENE
Indexed BySCI
Language英语
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000428848800023
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5210
Collection古环境研究室
Affiliation1.Changan Univ, Sch Earth Sci & Resources, Xian 710054, Shaanxi, Peoples R China
2.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth & Environm, Xian, Shaanxi, Peoples R China
3.Northwest Univ, Coll Urban & Environm Sci, Xian, Shaanxi, Peoples R China
Recommended Citation
GB/T 7714
Fu, Chaofeng,Qiang, Xiaoke,Xu, Xinwen,et al. Late Miocene magnetostratigraphy of Jianzha Basin in the northeastern margin of the Tibetan Plateau and changes in the East Asian summer monsoon[J]. GEOLOGICAL JOURNAL,2018,53(S1):282-292.
APA Fu, Chaofeng,Qiang, Xiaoke,Xu, Xinwen,Xi, Jianjian,Zuo, Jun,&An, Zhisheng.(2018).Late Miocene magnetostratigraphy of Jianzha Basin in the northeastern margin of the Tibetan Plateau and changes in the East Asian summer monsoon.GEOLOGICAL JOURNAL,53(S1),282-292.
MLA Fu, Chaofeng,et al."Late Miocene magnetostratigraphy of Jianzha Basin in the northeastern margin of the Tibetan Plateau and changes in the East Asian summer monsoon".GEOLOGICAL JOURNAL 53.S1(2018):282-292.
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