干旱区生态环境知识资源中心(Arid): Multiple age control of young nebkhas in the Mu Us dune field, north-central China

Arid

DOI	10.1016/j.quageo.2024.101531
	Multiple age control of young nebkhas in the Mu Us dune field, north-central China
	Wang, Ying; Li, Shihan; Yi, Shuangwen; Xu, Zhiwei
通讯作者	Yi, SW ; Xu, ZW
来源期刊	QUATERNARY GEOCHRONOLOGY
ISSN	1871-1014
EISSN	1878-0350
出版年	2024
卷号	82
英文摘要	Nebkhas, a unique type of biogeomorphological aeolian landforms formed by sand accumulation around plants, are widely distributed in arid and semi-arid regions globally. Previous studies have highlighted the potential of nebkha sediments as valuable archives for understanding past climate and environmental changes. However, establishing a reliable chronological framework for nebkha sediments has posed challenges due to the lack of suitable dating methods. In this study, we applied both the quartz OSL and K-feldspar pIRIR150 protocols to date nebkha sediments from three different sites within the Mu Us dune field in north-central China. Internal checks indicate that the quartz OSL protocol is suitable for equivalent dose measurements, though age determinations for some quartz samples with weak luminescence signals may be subject to uncertainties. K-feldspar exhibits brighter signal intensity and a higher signal-to-noise ratio, making K-feldspar pIRIR150 ages reliable, particularly when residual doses are low, luminescence signals are stable, and dose recovery ratios are satisfactory. The results indicate that the luminescence ages derived from both the quartz OSL and K-feldspar pIRIR150 protocols are comparable, and these ages align with stratigraphic sequences and independent 137Cs dating results. Based on the established chronologies, our findings suggest that some large nebkhas in the southwestern Mu Us dune field likely originated 100-200 years ago, possibly in response to either climate-driven or human-induced aridification in this region.
英文关键词	Luminescence dating Nebkhas Quartz OSL K-feldsparpIRIR150 Young sediments Paleoenvironmental change
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001238453000001
WOS关键词	K-FELDSPAR ; ENVIRONMENTAL-CHANGES ; TIBETAN PLATEAU ; SINGLE-ALIQUOT ; LAND DEGRADATION ; IRSL SIGNALS ; WIND EROSION ; EOLIAN SAND ; LUMINESCENCE ; DESERT
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405243
推荐引用方式 GB/T 7714	Wang, Ying,Li, Shihan,Yi, Shuangwen,et al. Multiple age control of young nebkhas in the Mu Us dune field, north-central China[J],2024,82.
APA	Wang, Ying,Li, Shihan,Yi, Shuangwen,&Xu, Zhiwei.(2024).Multiple age control of young nebkhas in the Mu Us dune field, north-central China.QUATERNARY GEOCHRONOLOGY,82.
MLA	Wang, Ying,et al."Multiple age control of young nebkhas in the Mu Us dune field, north-central China".QUATERNARY GEOCHRONOLOGY 82(2024).