干旱区生态环境知识资源中心(Arid): Geochemical analysis of yardang strata in the Dunhuang Yardang National Geopark, Northwest China, and implications on its palaeoenvironment, provenance, and potential dynamics

Arid

DOI	10.1016/j.aeolia.2019.06.003
	Geochemical analysis of yardang strata in the Dunhuang Yardang National Geopark, Northwest China, and implications on its palaeoenvironment, provenance, and potential dynamics
	Liang, Xiaolei 1,2,3; Niu, Qinghe 1,3; Qu, Jianjun1,3 ; Liu, Bing 1; Liu, Benli 1,3; Zhang, Caixia 1; Liu, Taotao 1,2,3
通讯作者	Niu, Qinghe ; Qu, Jianjun
来源期刊	AEOLIAN RESEARCH
ISSN	1875-9637
EISSN	2212-1684
出版年	2019
卷号	40 页码:91-104
英文摘要	Yardangs are landforms created by enigmatic processes. Sedimentary facies characteristic of yardang strata illustrate their vulnerability to wind erosion, which is important for understanding their morphological development. However, the lack of systematic research on the provenance of these geological structures and the sedimentary environment that led to their development have limited the conception of a yardang sedimentary model. In this study, we apply geochemical analysis to investigate yardang sediments from the Dunhuang Yardang National Geopark to characterize the provenance and the sedimentary environment through conventions based on the differentiation and aggregation of chemical elements. Results show that Beishan Mountain, Altyn-Tagh, Lop Nur, and the Shule River are all key material sources for the development of Dunhuang yardang, of which the Beishan Mountains and Altyn-Tagh predominate. As determined by geomorphological patterns, yardang transportation and sedimentary processes can be divided into three distinct types: alluvial flooding from Beishan Mountain and Altyn-Tagh, direct deposition from Lop Nur and the Shule River (as illustrated in river lake fades), and sediment re-transportation during river-lake phases following weathering processes. According to our results, the sedimentary environment of the Dunhuang yardang field is composed of fluvial, lacustrine, alluvial, and aeolian strata. With regards to its sedimentary evolution, the Dunhuang yardang field is characterized by periodic deposition both aeolian and aqueous sediments, and the profiles exhibit obvious differences respective to their paleogeomorphic patterns. Our findings are theoretically significant for understanding the formation and development of yardang landforms and practically significant for protecting these geological relics.
英文关键词	Yardang Geochemical analysis Provenance Sedimentary environment
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000488653300009
WOS关键词	MU US DESERT ; AEOLIAN DEPOSITS ; LAKE-SEDIMENTS ; INNER-MONGOLIA ; KUMTAGH DESERT ; SOURCE-AREA ; GRAIN-SIZE ; LOESS ; ORIGIN ; RATIOS
WOS类目	Geography, Physical
WOS研究方向	Physical Geography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/213903
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Gansu, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 3.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Dunhuang Gobi & Desert Ecol & Environm Res Stn, Dunhuang 736200, Peoples R China
推荐引用方式 GB/T 7714	Liang, Xiaolei,Niu, Qinghe,Qu, Jianjun,et al. Geochemical analysis of yardang strata in the Dunhuang Yardang National Geopark, Northwest China, and implications on its palaeoenvironment, provenance, and potential dynamics[J],2019,40:91-104.
APA	Liang, Xiaolei.,Niu, Qinghe.,Qu, Jianjun.,Liu, Bing.,Liu, Benli.,...&Liu, Taotao.(2019).Geochemical analysis of yardang strata in the Dunhuang Yardang National Geopark, Northwest China, and implications on its palaeoenvironment, provenance, and potential dynamics.AEOLIAN RESEARCH,40,91-104.
MLA	Liang, Xiaolei,et al."Geochemical analysis of yardang strata in the Dunhuang Yardang National Geopark, Northwest China, and implications on its palaeoenvironment, provenance, and potential dynamics".AEOLIAN RESEARCH 40(2019):91-104.