| Terrace dating as an archive of the run-through of the Sanmen Gorges |
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| 引用本文： | PAN Baotian,WANG Junping,GAO Hongshan,CHEN Yingying,LI Jijun,LIU Xiaofeng. Terrace dating as an archive of the run-through of the Sanmen Gorges[J]. 自然科学进展(英文版), 2005, 15(12): 1096-1103. DOI: 10.1080/10020070512331343191 |
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| 作者姓名： | PAN Baotian WANG Junping GAO Hongshan CHEN Yingying LI Jijun LIU Xiaofeng |
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| 作者单位： | Key Laboratory of Western China's Environmental Systems, Ministry of Education, and Department of Geography, Lanzhou University, Lanzhou 730000, China |
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| 基金项目： | 中国科学院资助项目，Innovation Team Project of National，教育部博士后科学基金，中国科学院资助项目 |
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| 摘 要： | Analysis of morphological properties in the Sanmen Gorges region of the Yellow River shows that four river terraces have been developed at the entrance to the gorges. Commonly, thick aeolian loess-paleosol sequence was deposited on the terraces, which makes it easy to date the terraces. The dating of paleomagnetic, loess-paleosol sequence matching and thermoluminescence show that terraces T2, T3 and T4 were formed 0.129 Ma, 0.625 Ma and 0.865 Ma ago, respectively. The formation of these terraces in this region indicates that the Yellow River has experienced four intensive downcutting events during the last 0.9 Ma. The Yellow River cut through the Sanmen Gorges and inpoured into the East China Sea no later than 0.865 Ma.
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| 关 键 词： | river terrace paleomagnetic dating Yellow River loess. |
Terrace dating as an archive of the run-through of the Sanmen Gorges |
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| PAN Baotian,WANG Junping,GAO Hongshan,CHEN Yingying,LI Jijun,LIU Xiaofeng. Terrace dating as an archive of the run-through of the Sanmen Gorges[J]. Progress in Natural Science, 2005, 15(12): 1096-1103. DOI: 10.1080/10020070512331343191 |
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| Authors: | PAN Baotian WANG Junping GAO Hongshan CHEN Yingying LI Jijun LIU Xiaofeng |
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| Affiliation: | Key Laboratory of Western China's Environmental Systems, Ministry of Education, and Department of Geography, Lanzhou University, Lanzhou 730000, China |
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| Abstract: | Analysis of morphological properties in the Sanmen Gorges region of the Yellow River shows that four river terraces have been developed at the entrance to the gorges. Commonly, thick aeolian loess-paleosol sequence was deposited on the terraces, which makes it easy to date the terraces. The dating of paleomagnetic, loess-paleosol sequence matching and thermoluminescence show that terraces T2, T3 and T4 were formed 0. 129 Ma, 0. 625 Ma and 0. 865 Ma ago, respectively. The formation of these terraces in this region indicates that the Yellow River has experienced four intensive downcutting events during the last 0.9 Ma. The Yellow River cut through the Sanmen Gorges and inpoured into the East China Sea no later than 0. 865 Ma. |
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| Keywords: | river terrace paleomagnetic dating Yellow River loess |
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