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New evidence for the provenance and formation of loess deposits in the Ili River Basin, Arid Central Asia
Li, Yue1,2,3; Song, Yougui1,4; Fitzsimmons, Kathryn E.2; Chen, Xiuling5; Wang, Qiansuo6; Sun, Huanyu5; Zhang, Zhiping7
Corresponding AuthorSong, Yougui(syg@ieecas.cn)
2018-12-01
Source PublicationAEOLIAN RESEARCH
ISSN1875-9637
Volume35Pages:1-8
AbstractLoess deposits are thick and widespread along the piedmonts of Arid Central Asia (ACA), however the source (provenance) and processes of formation of these fine-grained aeolian deposits are poorly understood. Here we investigate the provenance and possible distribution mechanisms for loess along the slopes of the Ili River basin, located in northwest China and southeastern Kazakhstan, using a grain-size mixture model and an elemental geochemistry-based source fingerprinting technique. Our results indicate that the Ili loess experiences low rates of sedimentary recycling downstream within the basin piedmont, and are strongly dependent on local geomorphic context. Loess deposits are dominated by proximal sources, indicating short-distance aeolian transport from the Ili River alluvial plains and local proluvial fans. Local sourcing dominated regardless of location within the catchment, although the proportion of fluvial input increases proportionally with increasing distance downstream. Our results suggest that the Central Asian deserts did not act as significant interim storage reservoirs for the loess deposits in the Ili River basin, which contrasts with the popular model for piedmont loess formation across Central Asia. Most likely the relatively enclosed and highly variable basin topography precluded transport from the open desert steppe into the upper Ili River valley. Our study provides the first clear evidence for a genetic link between the Asian high mountains and the loess of the adjacent piedmonts, based on geochemical and grain-size data, with the caveat that the high degree of topographic variability along the Tianshan piedmont likely results in a strongly localized influence on loess formation and accumulation.
KeywordCentral Asia Loess Trace element analysis Grain-size end-member analysis Fingerprinting technique Provenance
DOI10.1016/j.aeolia.2018.08.002
WOS KeywordLATE QUATERNARY LOESS ; CHEMICAL-WEATHERING HISTORY ; GRAIN-SIZE DISTRIBUTION ; ABRUPT CLIMATIC EVENTS ; LAST GLACIAL PERIOD ; CHINESE LOESS ; QUARTZ SILT ; GEOCHEMICAL EVIDENCE ; EOLIAN DUST ; PALEOSOL SEQUENCE
Indexed BySCI ; SCI
Language英语
Funding ProjectStrategic Priority Research Program of Chinese Academy of Sciences[XDB26020403] ; National Basic Research and Development Program of China[2016YFA0601902] ; International partnership Program of the Chinese Academy of Science[1321361KYS201600021] ; Natural Science Foundation of China[41572162] ; Natural Science Foundation of China[41302149]
WOS Research AreaPhysical Geography
Funding OrganizationStrategic Priority Research Program of Chinese Academy of Sciences ; National Basic Research and Development Program of China ; International partnership Program of the Chinese Academy of Science ; Natural Science Foundation of China
WOS SubjectGeography, Physical
WOS IDWOS:000452577700001
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/14490
Collection古环境研究室
Corresponding AuthorSong, Yougui
Affiliation1.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, 97 Yanxiang Rd, Xian 710061, Shaanxi, Peoples R China
2.Max Planck Inst Chem, Res Grp Terr Palaeoclimates, D-55128 Mainz, Germany
3.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Res Ctr Ecol & Environm Cent Asia, Urumqi 830011, Peoples R China
5.Fujian Normal Univ, Inst Geog, Fuzhou 350007, Fujian, Peoples R China
6.Linyi Univ, Coll Resources & Environm, Linyi 276000, Peoples R China
7.Environm Monitoring Stn Ili Kazakh Autonomous Pre, Yining 835000, Peoples R China
Recommended Citation
GB/T 7714
Li, Yue,Song, Yougui,Fitzsimmons, Kathryn E.,et al. New evidence for the provenance and formation of loess deposits in the Ili River Basin, Arid Central Asia[J]. AEOLIAN RESEARCH,2018,35:1-8.
APA Li, Yue.,Song, Yougui.,Fitzsimmons, Kathryn E..,Chen, Xiuling.,Wang, Qiansuo.,...&Zhang, Zhiping.(2018).New evidence for the provenance and formation of loess deposits in the Ili River Basin, Arid Central Asia.AEOLIAN RESEARCH,35,1-8.
MLA Li, Yue,et al."New evidence for the provenance and formation of loess deposits in the Ili River Basin, Arid Central Asia".AEOLIAN RESEARCH 35(2018):1-8.
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