| Discovery of a 1.0 Ma Yellow River terrace and redating of the fourth Yellow River terrace in Lanzhou area |
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| 引用本文： | PAN Baotian,SU Huai,HU Chunsheng,HU Xiaofei,ZHOU Tian and LI Jijun (Key Laboratory of Western China''s Environmental Systems,Ministry of Education,and Department of Geography,Lanzhou University,Lanzhou 730000,China). Discovery of a 1.0 Ma Yellow River terrace and redating of the fourth Yellow River terrace in Lanzhou area[J]. 自然科学进展(英文版), 2007, 17(2): 197-205 |
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| 作者姓名： | PAN Baotian SU Huai HU Chunsheng HU Xiaofei ZHOU Tian and LI Jijun (Key Laboratory of Western China''s Environmental Systems Ministry of Education and Department of Geography Lanzhou University Lanzhou 730000 China) |
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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： | 国家自然科学基金;国家重点基础研究发展计划(973计划) |
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| 摘 要： | Based on the aeolian loess sequence-stratigraphic division and paleomagnetic datings on terraces, we found that an undiscovered terrace with the age of 1.0 Ma BP lies between the Dunwashan terrace and Wuyishan terrace. This terrace recorded an intensive Yellow River incision event during that period. Results of paleomagnetic dating and optically stimulated luminescence (OSL) dating of the Wuyishan loess section and Zaoshugou loess section on the fourth Yellow River terrace (T4) show that the age of the fourth Yellow River terrace in Lanzhou area is 0.86 Ma BP rather than the previously believed 0. 6 Ma BP. This result answers a long-term question in the ge-omorphology community of whether there exists a 0. 8 Ma terrace in Lanzhou area. The discovery of the 1. 0 Ma Yellow River terrace and redating of the age of 0.6 Ma terrace in Lanzhou area provide new insights into further research on the evolution of Yellow River.
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Discovery of a 1.0 Ma Yellow River terrace and redating of the fourth Yellow River terrace in Lanzhou area |
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| PAN Baotian,SU Huai,HU Chunsheng,HU Xiaofei,ZHOU Tian,LI Jijun. Discovery of a 1.0 Ma Yellow River terrace and redating of the fourth Yellow River terrace in Lanzhou area[J]. Progress in Natural Science, 2007, 17(2): 197-205 |
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| Authors: | PAN Baotian SU Huai HU Chunsheng HU Xiaofei ZHOU Tian LI Jijun |
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| Abstract: | Based on the aeolian loess sequence-stratigraphic division and paleomagnetic datings on terraces, we found that an undiscovered terrace with the age of 1.0 Ma BP lies between the Dunwashan terrace and Wuyishan terrace. This terrace recorded an intensive Yellow River incision event during that period. Results of paleomagnetic dating and optically stimulated luminescence (OSL) dating of the Wuyishan loess section and Zaoshugou loess section on the fourth Yellow River terrace (T4) show that the age of the fourth Yellow River terrace in Lanzhou area is 0.86 Ma BP rather than the previously believed 0. 6 Ma BP. This result answers a long-term question in the ge-omorphology community of whether there exists a 0. 8 Ma terrace in Lanzhou area. The discovery of the 1. 0 Ma Yellow River terrace and redating of the age of 0.6 Ma terrace in Lanzhou area provide new insights into further research on the evolution of Yellow River. |
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| Keywords: | Lanzhou area Yellow River terrace dating |
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