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| 萨拉乌苏河流域萨拉乌苏组砂丘砂沉积特征 | |
| 引用本文： | 欧先交,李保生,靳鹤龄,董光荣,章典,吴正,温小浩,曾兰华,欧阳椿陶,杨艺,刘宇飞.萨拉乌苏河流域萨拉乌苏组砂丘砂沉积特征[J].地理学报(英文版),2008,18(2):211-224. |
| 作者姓名： | 欧先交 李保生 靳鹤龄 董光荣 章典 吴正 温小浩 曾兰华 欧阳椿陶 杨艺 刘宇飞 |
| 作者单位： | [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 710061, China [3]Department of Geography, Jiaying University, Meizhou 514015, China [4]Cold and Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 730000, China [5]Department of Geography and Geology, the University of Hong Kong, Hong Kong, China |
| 基金项目： | 国家重点基础研究发展计划(973计划)，国家自然科学基金，The RGC Grant of the HKSAR |
| 摘 要： | The Salawusu Formation of Milanggouwan section in Salawusu River Valley includes 7 layers of paleo-mobile dune sands, and 4 layers of paleo-fixed and semi-fixed dune sands. Their structures have been observed and their grain size, surface textural features and several main chemical elements have been analyzed. The results showed that： 1） Some of the aeolian structural characteristics of these dune sands are similar to that of the recent dune sands. 2） They are also similar to the recent dune sands in grain size components, and parameters of Mz,σ, Sk and Kg, as well as in several main chemical components. 3） The scattergrams of Mz-σ and SiO2-Al2O3＋TOFE and the probability curves of grain size showed that these paleo-dune sands are different from paleosols and fluvio-lacustrine facies, but are consistency with recent dune sands. 4） Quartz sands have well roundness and surface textural features such as dish-shaped pits, crescent-shaped pits, pockmarked pits, upturned cleavage plates, siliceous precipitates and siliceous crevasses, indicating that they had been carried for a long time by the wind. As the 11 layers of paleo-dune sands possess the aeolian characteristics in structure, grain size, surface textural features and chemical elements, the origin of their formation should be attributed to eolation. |
| 关 键 词： | 萨拉乌苏河流域 组砂丘 砂沉积 特征 |
Sedimentary characteristics of paleo-aeolian dune sands of Salawusu Formation in the Salawusu River Valley |
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| Xianjiao Ou,Baosheng Li,Heling Jin,Guangrong Dong,David Dian Zhang,Zheng Wu,Xiaohao Wen,Lanhua Zeng,Chuntao Ouyang,Yi Yang,Yufei Liu.Sedimentary characteristics of paleo-aeolian dune sands of Salawusu Formation in the Salawusu River Valley[J].Journal of Geographical Sciences,2008,18(2):211-224. | |
| Authors: | Xianjiao Ou Baosheng Li Heling Jin Guangrong Dong David Dian Zhang Zheng Wu Xiaohao Wen Lanhua Zeng Chuntao Ouyang Yi Yang Yufei Liu |
| Institution: | 1. School of Geography, South China Normal University, Guangzhou 510631, China;Department of Geography, Jiaying University, Meizhou 514015, China 2. School of Geography, South China Normal University, Guangzhou 510631, China;State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS, Xi'an 710061, China 3. Cold and Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 730000, China 4. Department of Geography and Geology, the University of Hong Kong, Hong Kong, China 5. School of Geography, South China Normal University, Guangzhou 510631, China 6. Department of Geography, Jiaying University, Meizhou 514015, China |
| Abstract: | The Salawusu Formation of Milanggouwan section in Salawusu River Valley in-cludes 7 layers of paleo-mobile dune sands, and 4 layers of paleo-fixed and semi-fixed dune sands. Their structures have been observed and their grain size, surface textural features and several main chemical elements have been analyzed. The results showed that: 1) Some of the aeolian structural characteristics of these dune sands are similar to that of the recent dune sands. 2) They are also similar to the recent dune sands in grain size components, and pa-rameters of Mz, σ, Sk and Kg, as well as in several main chemical components. 3) The scattergrams of Mz-σ and SiO2--Al2O3+TOFE and the probability curves of grain size showed that these paleo-dune sands are different from paleosols and fluvio-lacustrine facies, but are consistency with recent dune sands. 4) Quartz sands have well roundness and surface tex-tural features such as dish-shaped pits, crescent-shaped pits, pockmarked pits, upturnedcleavage plates, siliceous precipitates and siliceous crevasses, indicating that they had been carried for a long time by the wind. As the 11 layers of paleo-dune sands possess the aeolian characteristics in structure, grain size, surface textural features and chemical elements, the origin of their formation should be attributed to eolation. |
| Keywords: | Salawnsu River Valley Salawusu Formation paleo-aeolian dune sands aeolian sedimentary charac-teristics |
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