气候变化领域集成服务门户(CCPortal): Rock magnetic record of late Neogene red clay sediments from the Chinese Loess Plateau and its implications for East Asian monsoon evolution

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DOI	10.1016/j.palaeo.2017.09.025
	Rock magnetic record of late Neogene red clay sediments from the Chinese Loess Plateau and its implications for East Asian monsoon evolution
	Song, Yougui; Fang, Xiaomin; Chen, Xiuling; Torii, Masayuki; Ishikawa, Naoto; Zhang, Maosheng; Yang, Shengli; Chan, Hong
通讯作者	Song, YG (通讯作者)
发表日期	2018
ISSN	0031-0182
EISSN	1872-616X
起始页码	109
结束页码	123
卷号	510
英文摘要	The Quaternary loess-paleosol and underlying Neogene red clay sequences on the Chinese Loess Plateau (CLP) contain a remarkable continental record of past East Asian monsoon changes and aridification of the Asian interior. While monsoon variability during the Quaternary is reasonably well understood, the evolution and dynamics of the monsoon during the Neogene are still debated. The rock magnetism of aeolian sediments is a well-established tool for reconstructing the palaeoclimatic history of Asia. Here, we present a rock magnetic record from Late Neogene red clay sediments of the Chaona section in the central CLP. The results indicate that the main magnetic minerals in the red clay are magnetite, maghemite, hematite and goethite, similar to the overlying Quaternary loess-palaeosol sequences. The high-resolution rock magnetic record, combined with the results of other proxies, demonstrate a stepwise intensification of the summer monsoon and a progressive enhancement of the winter monsoon in East Asia during the Late Neogene. Based on the results, the climatic evolution of East Asia can be divided into three intervals: Interval III, from 8.1 to 6.8 Ma, is characterized by a cool, dry climate with a relatively weak East Asian Summer Monsoon (EASM) and East Asian Winter Monsoon (EAWM); Interval II, from 6.8 to 4.3 Ma, is characterized by cool/warm cycles; and Interval I, from 4.3 to 2.8/2.6 Ma, was warm and humid, and within which the EASM strengthened rapidly and the EAWM fluctuated considerably, with an increasing trend. We infer that before 4.3 Ma the variations of both the EASM and EAWM were closely related to global cooling and that the intensified EASM during the late Pliocene was primarily caused by tectonic events, including the gradual closure of the Panama Seaway and the uplift of the Tibetan Plateau, rather than by global cooling.
关键词	LATE CENOZOIC UPLIFT ANTARCTIC ICE-SHEET GRAIN-SIZE RECORDS LATE MIOCENE TIBETAN PLATEAU PALEOCLIMATIC SIGNIFICANCE SUMMER MONSOON MODERN SOILS LIUPAN-SHAN LOESS/PALAEOSOL SEQUENCES
英文关键词	Late Miocene; Pliocene; Global cooling; Tectonic events; Magnetic minerals
语种	英语
WOS研究方向	Physical Geography ; Geology ; Paleontology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:000452585100011
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259332
推荐引用方式 GB/T 7714	Song, Yougui,Fang, Xiaomin,Chen, Xiuling,et al. Rock magnetic record of late Neogene red clay sediments from the Chinese Loess Plateau and its implications for East Asian monsoon evolution[J]. 中国科学院青藏高原研究所,2018,510.
APA	Song, Yougui.,Fang, Xiaomin.,Chen, Xiuling.,Torii, Masayuki.,Ishikawa, Naoto.,...&Chan, Hong.(2018).Rock magnetic record of late Neogene red clay sediments from the Chinese Loess Plateau and its implications for East Asian monsoon evolution.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,510.
MLA	Song, Yougui,et al."Rock magnetic record of late Neogene red clay sediments from the Chinese Loess Plateau and its implications for East Asian monsoon evolution".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 510(2018).