New evidence for the provenance and formation of loess deposits in the Ili River Basin, Arid Central Asia
文献类型：期刊论文
| 作者 | Li, Yue5,6,7; Song, Yougui2,5 ; Fitzsimmons, Kathryn E.6; Chen, Xiuling3; Wang, Qiansuo1; Sun, Huanyu3; Zhang, Zhiping4
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| 刊名 | AEOLIAN RESEARCH
 |
| 出版日期 | 2018-12-01 |
| 卷号 | 35页码:1-8 |
| ISSN号 | 1875-9637 |
| 关键词 | Central Asia Loess Trace element analysis Grain-size end-member analysis Fingerprinting technique Provenance |
| DOI | 10.1016/j.aeolia.2018.08.002 |
| 通讯作者 | Song, Yougui(syg@ieecas.cn) |
| 英文摘要 | Loess 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. |
| WOS关键词 | LATE QUATERNARY LOESS ; CHEMICAL-WEATHERING HISTORY ; GRAIN-SIZE DISTRIBUTION ; ABRUPT CLIMATIC EVENTS ; LAST GLACIAL PERIOD ; CHINESE LOESS ; QUARTZ SILT ; GEOCHEMICAL EVIDENCE ; EOLIAN DUST ; PALEOSOL SEQUENCE |
| 资助项目 | Strategic 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研究方向 | Physical Geography |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCI LTD |
| WOS记录号 | WOS:000452577700001 |
| 资助机构 | Strategic 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 |
| 源URL | [http://ir.ieecas.cn/handle/361006/14489]  |
| 专题 | 地球环境研究所_古环境研究室 |
| 通讯作者 | Song, Yougui |
| 作者单位 | 1.Linyi Univ, Coll Resources & Environm, Linyi 276000, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecol & Environm Cent Asia, Urumqi 830011, Peoples R China 3.Fujian Normal Univ, Inst Geog, Fuzhou 350007, Fujian, Peoples R China 4.Environm Monitoring Stn Ili Kazakh Autonomous Pre, Yining 835000, Peoples R China 5.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, 97 Yanxiang Rd, Xian 710061, Shaanxi, Peoples R China 6.Max Planck Inst Chem, Res Grp Terr Palaeoclimates, D-55128 Mainz, Germany 7.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：地球环境研究所
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