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| 额济纳绿洲沙尘暴沉积特征 | |
| 引用本文： | 温小浩,李保生,王为,LI Sen,OU Xianjiao,ZHENG Yanming.额济纳绿洲沙尘暴沉积特征[J].地理学报(英文版),2006,16(4):502-508. |
| 作者姓名： | 温小浩 李保生 王为 LI Sen OU Xianjiao ZHENG Yanming |
| 作者单位： | 1. 华南师范大学 2. Department of Tourism, Resources and Environment, Foshan University, Foshan 528000, China 3. School of Geography, South China Normal University, Guangzhou 510631, China |
| 基金项目： | National Basic Research Program of China, No.2004CB720206; Knowledge Innovation Project of CAS, No.KZCX2-SW- 118 |
| 摘 要： | 1 Introduction Oases are unique ecosystems and important residences for our ancestors in arid and semiarid regions of the world, and have deeply been imprinted by human actions, such as Jericho oasis of Jordan Valley, Jarmo oasis of the Euphrates River an… |
| 关 键 词： | 植被覆盖沙丘 沙尘暴 主要化学元素 化学分析 |
| 收稿时间： | 2/9/2006 12:00:00 AM |
| 修稿时间： | 2006-02-092006-05-12 |
Deposition of sandstorms in a vegetation-covered sand dune in Ejin Oasis and its characteristics |
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| Xiaohao Wen,Baosheng Li,Wei Wang,Sen Li,Xianjiao Ou,Yanming Zheng.Deposition of sandstorms in a vegetation-covered sand dune in Ejin Oasis and its characteristics[J].Journal of Geographical Sciences,2006,16(4):502-508. | |
| Authors: | Xiaohao Wen Baosheng Li Wei Wang Sen Li Xianjiao Ou Yanming Zheng |
| Institution: | (1) School of Geography, South China Normal University, Guangzhou, 510631, China;(2) State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS, Xi’an, 710075, China;(3) Department of Tourism, Resources and Environment, Foshan University, Foshan, 528000, China |
| Abstract: | “Ejin Section” found in a typical vegetation-covered sand dune in Ejin Oasis was investigated. In this study, 263 samples were taken from the section for grain-size analysis, 25 for chemical analysis, 11 for 14C dating and 6 for scanning electron microscope (SEM). The results of the study indicate that 3 types of the sediments in the section can be identified, YS, LS and ST. YS, homogeneous yellow-brown dune sands, is equal to those of inland deserts, LS, loess-like sandy soils, is the same as the sandy loess in the middle Yellow River and modern falling dusts, and ST, sandy sediments interbeded with the deadwood and defoliation of Tamarix spp, represents the depositional process of the section interrupted by abrupt changes in climate. The Ejin Section has recorded the repeated dust-storms or sandstorms since 2500 yr BP and the peak periods of the dust-storms or sandstorms revealed by the section are consistent with the records of “dust rains” in historical literatures, indicating that the change of climate is a key factor to increase sandstorms or dust-storms, whereas, “artificial” factor may only be an accelerating one for desertification. Foundation: National Basic Research Program of China, No.2004CB720206; Knowledge Innovation Project of CAS, No.KZCX2-SW-118 Author: Wen Xiaohao (1979–), Ph.D. Candidate, specialized in Quaternary environment and analyses of sediments. |
| Keywords: | Ejin Oasis vegetation-covered sand dune dust storm sandstorm grain size major chemical element |
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