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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
发表期刊GEOLOGICAL JOURNAL
卷号53期号:S1页码:282-292
文章类型Article
摘要Jianzha 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.
关键词East Asian Summer Monsoon Jianzha Basin Late Miocene Magnetostratigraphy Northeast Tibet Plateau
WOS标题词Science & Technology ; Physical Sciences
DOI10.1002/gj.3047
关键词[WOS]CHINESE LOESS PLATEAU ; LAST 130,000 YEARS ; MAGNETIC-SUSCEPTIBILITY ; CLIMATE-CHANGE ; PALEOCLIMATIC IMPLICATIONS ; ENVIRONMENTAL-CHANGES ; GEOCHEMICAL RECORDS ; PALEOSOL SEQUENCES ; INDIAN MONSOON ; MIDDLE MIOCENE
收录类别SCI
语种英语
WOS研究方向Geology
WOS类目Geosciences, Multidisciplinary
WOS记录号WOS:000428848800023
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5210
专题古环境研究室
作者单位1.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
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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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