Wind erosion on the north-eastern Tibetan Plateau: Constraints from OSL and U-Th dating of playa salt crust in the Qaidam Basin (EI)
文献类型：期刊论文
| 作者 | Han W. ; Ma Z. ; Lai Z. ; Appel E. ; Fang X. ; Yu L. |
| 刊名 | Earth Surface Processes and Landforms
 |
| 出版日期 | 2014 |
| 卷号 | 39期号:6页码:779-789 |
| 英文摘要 | The arid Qaidam Basin is the largest (~3.88104km2) basin on the north-eastern Tibetan Plateau. Wind erosion in the area has been regarded as an important trigger for intra-basin tectonic balance upheaval, geomorphologic development and as a major supplier of dust to the Chinese Loess Plateau downwind. An initial estimate of the rate of wind erosion (Kapp et al., 2011) based on geological cross-sections has suggested up to 3.2104km3 of sediments has been deflated over the past 2.8Ma, lowering the landscape by an average of 0.29mm/yr. In this paper we re-evaluate this estimate by dating surface crusts present on three playas within the basin. Understanding the development of these playas is crucial to assessing the overall role of the wind in shaping the regional landscape because they are typically capped with a thick salt crust which effectively protects them from wind erosion. Optically stimulated luminescence (OSL) and U-series dating from a pit section and from the top of a deep drill core, together with results from magnetostratigraphy and a climate proxy record correlated to the marine oxygen isotope record, are used here to determine the age of the playa plains and suggest that the salt crusts have an age of c. 0.1Ma. This young age and the wide distribution of resistant thick salt crusts of the playa plains indicate a much lower degree of wind erosion than previously suggested. The crusts protect the surface from significant surface erosion (including sediment exhumation and unloading) and whilst some wind erosion does occur, it is unlikely to be sufficient to trigger tectonic uplift of the basin or to be a major dust source for the Loess Plateau as previously suggested. 2013 John Wiley Sons, Ltd. |
| 收录类别 | EI |
| 公开日期 | 2015-12-24 |
| 源URL | [http://ir.casnw.net/handle/362004/25235]  |
| 专题 | 寒区旱区环境与工程研究所_中科院寒区旱区环境与工程研究所（未分类）_期刊论文 |
| 推荐引用方式 GB/T 7714 | Han W.,Ma Z.,Lai Z.,et al. Wind erosion on the north-eastern Tibetan Plateau: Constraints from OSL and U-Th dating of playa salt crust in the Qaidam Basin (EI)[J]. Earth Surface Processes and Landforms,2014,39(6):779-789. |
| APA | Han W.,Ma Z.,Lai Z.,Appel E.,Fang X.,&Yu L..(2014).Wind erosion on the north-eastern Tibetan Plateau: Constraints from OSL and U-Th dating of playa salt crust in the Qaidam Basin (EI).Earth Surface Processes and Landforms,39(6),779-789. |
| MLA | Han W.,et al."Wind erosion on the north-eastern Tibetan Plateau: Constraints from OSL and U-Th dating of playa salt crust in the Qaidam Basin (EI)".Earth Surface Processes and Landforms 39.6(2014):779-789. |
入库方式： OAI收割
来源：寒区旱区环境与工程研究所
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