Late Miocene magnetostratigraphy of Jianzha Basin in the northeastern margin of the Tibetan Plateau and changes in the East Asian summer monsoon

doi:10.1002/gj.3047

	Late Miocene magnetostratigraphy of Jianzha Basin in the northeastern margin of the Tibetan Plateau and changes in the East Asian summer monsoon
	Fu, Chaofeng 2,3; An, Zhisheng 2; Qiang, Xiaoke 2; Xu, Xinwen 1; Xi, Jianjian 3; Zuo, Jun 3
刊名	GEOLOGICAL JOURNAL
	2018-03-01
卷号	53 期号:S1 页码:282-292
关键词	East Asian Summer Monsoon Jianzha Basin Late Miocene Magnetostratigraphy Northeast Tibet Plateau
DOI	10.1002/gj.3047
文献子类	Article
英文摘要	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.
WOS关键词	CHINESE LOESS PLATEAU ; LAST 130,000 YEARS ; MAGNETIC-SUSCEPTIBILITY ; CLIMATE-CHANGE ; PALEOCLIMATIC IMPLICATIONS ; ENVIRONMENTAL-CHANGES ; GEOCHEMICAL RECORDS ; PALEOSOL SEQUENCES ; INDIAN MONSOON ; MIDDLE MIOCENE
WOS研究方向	Geology
语种	英语
WOS记录号	WOS:000428848800023
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/5210]
专题	地球环境研究所_古环境研究室
作者单位	1.Northwest Univ, Coll Urban & Environm Sci, Xian, Shaanxi, Peoples R China 2.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth & Environm, Xian, Shaanxi, Peoples R China 3.Changan Univ, Sch Earth Sci & Resources, Xian 710054, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Fu, Chaofeng,An, Zhisheng,Qiang, Xiaoke,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,An, Zhisheng,Qiang, Xiaoke,Xu, Xinwen,Xi, Jianjian,&Zuo, Jun.(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.