干旱区生态环境知识资源中心(Arid): Effect of plant roots on the radiocarbon age of loess deposits in arid central Asia

Arid

DOI	10.1016/j.palaeo.2024.112403
	Effect of plant roots on the radiocarbon age of loess deposits in arid central Asia
	Wang, Leibin; Deng, Huizhen; Zhao, Hui; Xia, Huan; Zhou, Aifeng; Wang, Qiang; Chen, Fahu
通讯作者	Zhao, H
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
EISSN	1872-616X
出版年	2024
卷号	651
英文摘要	Radiocarbon and OSL dating are the two main approaches used to date aeolian deposits in arid central Asia (ACA). Previous results showed that, compared with OSL dating, the C-14 ages of loess deposits in ACA are underestimated when the loess age is beyond similar to 25 ka. However, the cause of this radiocarbon age underestimation has not been adequately addressed. In this study, we measured the C-14 ages of different dating materials, including pyrolysis volatile (Py-V), pyrolysis residue (Py-R), humin, and total organic carbon fractions from two loess sections in ACA (the Hoalin section in the western Pamir Mountains, and the TLD16 section in the northern Tianshan Mountains). The results show that different dating material yielded different C-14 ages for all the loess samples, and all the radiocarbon ages obtained are younger than their corresponding OSL ages. Based on these results, together with a regional comparison of 78 C-14 ages from ACA with their corresponding OSL ages, we propose that the C-14 age underestimation is mainly due to the contamination by the deep penetration of the extended root systems of the plants that grow in arid areas, whereas this effect is less significant in the summer monsoon-dominated Chinese Loess Plateau.
英文关键词	C-14 dating Pyrolysis-combustion OSL dating Extended plant roots ACA
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001290992200001
WOS关键词	TERRESTRIAL GASTROPOD SHELLS ; LATE QUATERNARY LOESS ; SOIL ORGANIC-MATTER ; CLIMATE-CHANGE ; SEQUENTIAL PYROLYSIS ; BIOMASS ALLOCATION ; PALEOSOL SEQUENCE ; TASHKENT REGION ; HOLOCENE LOESS ; LOWER REACHES
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向	Physical Geography ; Geology ; Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405032
推荐引用方式 GB/T 7714	Wang, Leibin,Deng, Huizhen,Zhao, Hui,et al. Effect of plant roots on the radiocarbon age of loess deposits in arid central Asia[J],2024,651.
APA	Wang, Leibin.,Deng, Huizhen.,Zhao, Hui.,Xia, Huan.,Zhou, Aifeng.,...&Chen, Fahu.(2024).Effect of plant roots on the radiocarbon age of loess deposits in arid central Asia.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,651.
MLA	Wang, Leibin,et al."Effect of plant roots on the radiocarbon age of loess deposits in arid central Asia".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 651(2024).