Provenance fluctuations of aeolian deposits on the Chinese Loess Plateausince the Miocene

doi:10.1016/j.aeolia.2015.05.002

CORC > 地球环境研究所 > 中国科学院地球环境研究所 > 黄土与第四纪地质国家重点实验室（2010~）

	Provenance fluctuations of aeolian deposits on the Chinese Loess Plateausince the Miocene
	Chen,HY(Chen,Hongyun)[4]; Lin,M(Lin,Min)[5]; Nagashima,K(Nagashima,Kana)[6]; Ma,L(Ma,Long)[1,2]; Sun,YB(Sun,Youbin)[1]; Tada,R(Tada,Ryuji)[3]; Yan,Y(Yan,Yan)[1,2]
刊名	Aeolian Research
	2015-06
卷号	18 期号:2015 页码:1-9
关键词	Chinese Loess Plateau Aeolian deposits Quartz ESR signal intensity Crystallinity index Provenance change
DOI	10.1016/j.aeolia.2015.05.002
文献子类	期刊论文
英文摘要	The evolution of the provenance of aeolian deposits on the Chinese Loess Plateau (CLP) is closely linked to changes in source aridity and dust transport dynamics. Although previous studies have revealed that the provenance of Chinese aeolian deposits may have fluctuated on tectonic timescales, the exact timing and cause of the provenance shifts remain poorly constrained due to limitations of the isotopic and mineralogical tracers used. Here we report the results of electron spin resonance (ESR) signal intensity and crystallinity index (CI) of fine-grained (<16 lm) quartz isolated from two aeolian sequences on the CLP, in order to address tectonic-scale shifts in dust provenance over the last 23.5 Ma. The ESR–CI results spanning the interval 7–5 Ma for two aeolian sequences are comparable, implying a broadly similar provenance of dust deposits over the entire CLP. The ESR–CI values are lower after 7 Ma than before 9.5 Ma, indicating that a significant provenance shift occurred during 9.5–7 Ma. Comparison of the ESR–CI results for fine-grained quartz in desert surface samples and for the loess and Red Clay sequences indicates that the provenance shift may have been caused by increased dust input from the Mongolian Gobi and western China (i.e., the Taklimakan desert) since the late Miocene. The combination of our results with regional tectonic evidence and global climate record suggests that tectonically-driven climate changes in the dust sources may have played a dominant role in driving the late Miocene provenance shift.
语种	英语
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/9614]
专题	地球环境研究所_黄土与第四纪地质国家重点实验室（2010~）
作者单位	1.Research Center for Loess and Global Changes, Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050803, China; 2.Research and Development Center for Global Change, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka 237-0061, Japan 3.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China; 4.University of Chinese Academy of Sciences, Beijing 100049, China; 5.Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Tokyo 113-0033, Japan; 6.Radiometrology Center, China Institute of Atomic Energy, Beijing 102413, China;
推荐引用方式 GB/T 7714	Chen,HY,Lin,M,Nagashima,K,et al. Provenance fluctuations of aeolian deposits on the Chinese Loess Plateausince the Miocene[J]. Aeolian Research,2015,18(2015):1-9.
APA	Chen,HY.,Lin,M.,Nagashima,K.,Ma,L.,Sun,YB.,...&Yan,Y.(2015).Provenance fluctuations of aeolian deposits on the Chinese Loess Plateausince the Miocene.Aeolian Research,18(2015),1-9.
MLA	Chen,HY,et al."Provenance fluctuations of aeolian deposits on the Chinese Loess Plateausince the Miocene".Aeolian Research 18.2015(2015):1-9.