干旱区生态环境知识资源中心(Arid): A Holocene lacustrine record of variations in chemical weathering intensity in the Mu Us Desert, China

Arid

DOI	10.1016/j.scitotenv.2023.166281
	A Holocene lacustrine record of variations in chemical weathering intensity in the Mu Us Desert, China
	Li, Yijing; Liu, Xiaokang; Pang, Jiangli; Ding, Zhiyong; Yue, Xiaoxiao; Yang, Xingdi; Zhao, Yixue; Dong, Zhibao
通讯作者	Liu, XK
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2023
卷号	903
英文摘要	The Mu Us Desert is an ideal location to study environmental changes during the Late Quaternary, because of its unique characteristics. The Abaoyan (ABY) profile, a typical aeolian-lacustrine profile located at the eastern edge of the desert, was investigated in this study. A basic chronological framework was established based on a combination of radiocarbon dating by accelerator mass spectrometry and in situ sedimentary phase identification. Furthermore, changes in regional chemical weathering intensity since the Holocene were evaluated through comprehensive analysis of the collected samples in terms of grain size, loss on ignition (LOI), chromaticity, geochemical element contents, and soil micromorphology. The results showed that the ABY profile was under the influence of primary and moderate chemical weathering. Regional paleoclimatic environmental changes could be divided into four stages. During Stage I (before 12.6 ka BP; pre-Holocene), the ABY profile was dominated by aeolian sand, showing a coarse average grain size, low LOI, and high chromaticity values, which may have indicated a dry and cold period. During Stage II (12.6-10.3 ka BP; early Holocene), the ABY profile was dominated by lacustrine sediments, indicating a shallow lake water environment with strong chemical weathering and a warm and humid climate. During Stage III (10.3-4.2 ka BP), the profile was dominated by sandy peat deposits with a relatively large proportion of clay particles suggesting that the intensity of chemical weathering was relatively strong in the region during this period and the climate was mainly warm and humid. During Stage IV (after 4.2 ka BP), the sediment was dominated by aeolian sand and secondary loess, the chromaticity increased, the LOI reduced, and the regional chemical weathering intensity was weaker. The change in chemical weathering intensity in this region was inferred to be a positive response to the Holocene East Asian monsoon circulation.
英文关键词	Mu Us Desert Geochemistry characteristics Holocene epoch Paleoclimate Degree of weathering
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001066802400001
WOS关键词	HIGH-RESOLUTION ; GEOCHEMICAL CHARACTERIZATION ; MAGNETIC-SUSCEPTIBILITY ; AEOLIAN DEPOSITS ; PEAT SEDIMENTS ; LAKE ; EVOLUTION ; SEQUENCE ; DESERTIFICATION ; INDICATOR
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/398555
推荐引用方式 GB/T 7714	Li, Yijing,Liu, Xiaokang,Pang, Jiangli,et al. A Holocene lacustrine record of variations in chemical weathering intensity in the Mu Us Desert, China[J],2023,903.
APA	Li, Yijing.,Liu, Xiaokang.,Pang, Jiangli.,Ding, Zhiyong.,Yue, Xiaoxiao.,...&Dong, Zhibao.(2023).A Holocene lacustrine record of variations in chemical weathering intensity in the Mu Us Desert, China.SCIENCE OF THE TOTAL ENVIRONMENT,903.
MLA	Li, Yijing,et al."A Holocene lacustrine record of variations in chemical weathering intensity in the Mu Us Desert, China".SCIENCE OF THE TOTAL ENVIRONMENT 903(2023).