Sedimentary records and chronology of the late Pleistocene overbank flooding in the Yellow River source area, NE Tibetan Plateau
Paleohydrological investigations were carried out in the Yellow River source area on the northeast (NE) Tibetan Plateau. During our fieldwork investigations, two units of overbank flood deposits (OFD) were found in the Maqu-Kesheng reach. These OFD units were studied using a multi-index approach, in...
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Frontiers Media S.A.
2022-09-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2022.1021106/full |
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| author | Yan Zhu Haoyu Wang Yuzhu Zhang Chun Chang Huang Xiaochun Zha Haijun Qiu Ya-na Jia Qili Xiao Dou Chen Xu Lin Tao Liu |
| author_facet | Yan Zhu Haoyu Wang Yuzhu Zhang Chun Chang Huang Xiaochun Zha Haijun Qiu Ya-na Jia Qili Xiao Dou Chen Xu Lin Tao Liu |
| author_sort | Yan Zhu |
| collection | DOAJ |
| description | Paleohydrological investigations were carried out in the Yellow River source area on the northeast (NE) Tibetan Plateau. During our fieldwork investigations, two units of overbank flood deposits (OFD) were found in the Maqu-Kesheng reach. These OFD units were studied using a multi-index approach, including magnetic susceptibility, hygroscopic water, grain size distribution and micro-morphological features. It can be inferred that they have recorded two episodes of overbank flooding of the Yellow River. Using the optically stimulated luminescence (OSL) and AMS 14C dating techniques, the first episode was dated to 34,680 ± 1880-29000 ± 1790 a and correlated with the late Marine Isotope Stage 3a (MIS 3a) with a warm and wet climate. The second episode occurred at 16,500 ± 1,250-14000 ± 1,280 a, which is coincided with the Bølling-Allerød warm stage during the last deglaciation, a period of coexisting global warming and rapidly shrinking ice sheets. At these two periods, the water was mainly derived from the accelerated melting of mountain glaciers surrounding the basin and/or the large-scale precipitation, which led to the overbank flooding events. At the same time, the related overbank flood deposits were interbedded within glacial outwash/flashflood deposits in the valley bottom of the Yellow River, which intensified the valley aggradation. These results are of great significance in enriching the paleoflood records in the Yellow River source area, recognizing the effect of river system on the development of valley landform, as well as understanding the hydro-climatic response of the Tibetan Plateau to global climate warming occurring presently. |
| first_indexed | 2024-04-11T10:40:37Z |
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| language | English |
| last_indexed | 2024-04-11T10:40:37Z |
| publishDate | 2022-09-01 |
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| series | Frontiers in Earth Science |
| spelling | doaj.art-ee5c5fcc165d43f48caddca7dfa7c9c92022-12-22T04:29:11ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632022-09-011010.3389/feart.2022.10211061021106Sedimentary records and chronology of the late Pleistocene overbank flooding in the Yellow River source area, NE Tibetan PlateauYan Zhu0Haoyu Wang1Yuzhu Zhang2Chun Chang Huang3Xiaochun Zha4Haijun Qiu5Ya-na Jia6Qili Xiao7Dou Chen8Xu Lin9Tao Liu10Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi’an, ChinaKey Laboratory of Western China’s Environmental Systems (Ministry of Education), College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, ChinaShaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi’an, ChinaSchool of Geography and Tourism, Shaanxi Normal University, Xi’an, ChinaKey Laboratory of Western China’s Environmental Systems (Ministry of Education), College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, ChinaShaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi’an, ChinaShaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi’an, ChinaShaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi’an, ChinaShaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi’an, ChinaShaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi’an, ChinaDepartment of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ, United StatesPaleohydrological investigations were carried out in the Yellow River source area on the northeast (NE) Tibetan Plateau. During our fieldwork investigations, two units of overbank flood deposits (OFD) were found in the Maqu-Kesheng reach. These OFD units were studied using a multi-index approach, including magnetic susceptibility, hygroscopic water, grain size distribution and micro-morphological features. It can be inferred that they have recorded two episodes of overbank flooding of the Yellow River. Using the optically stimulated luminescence (OSL) and AMS 14C dating techniques, the first episode was dated to 34,680 ± 1880-29000 ± 1790 a and correlated with the late Marine Isotope Stage 3a (MIS 3a) with a warm and wet climate. The second episode occurred at 16,500 ± 1,250-14000 ± 1,280 a, which is coincided with the Bølling-Allerød warm stage during the last deglaciation, a period of coexisting global warming and rapidly shrinking ice sheets. At these two periods, the water was mainly derived from the accelerated melting of mountain glaciers surrounding the basin and/or the large-scale precipitation, which led to the overbank flooding events. At the same time, the related overbank flood deposits were interbedded within glacial outwash/flashflood deposits in the valley bottom of the Yellow River, which intensified the valley aggradation. These results are of great significance in enriching the paleoflood records in the Yellow River source area, recognizing the effect of river system on the development of valley landform, as well as understanding the hydro-climatic response of the Tibetan Plateau to global climate warming occurring presently.https://www.frontiersin.org/articles/10.3389/feart.2022.1021106/fullTibetan PlateauYellow River source arealate Pleistoceneenvironmental evolutionoverbank flooding |
| spellingShingle | Yan Zhu Haoyu Wang Yuzhu Zhang Chun Chang Huang Xiaochun Zha Haijun Qiu Ya-na Jia Qili Xiao Dou Chen Xu Lin Tao Liu Sedimentary records and chronology of the late Pleistocene overbank flooding in the Yellow River source area, NE Tibetan Plateau Frontiers in Earth Science Tibetan Plateau Yellow River source area late Pleistocene environmental evolution overbank flooding |
| title | Sedimentary records and chronology of the late Pleistocene overbank flooding in the Yellow River source area, NE Tibetan Plateau |
| title_full | Sedimentary records and chronology of the late Pleistocene overbank flooding in the Yellow River source area, NE Tibetan Plateau |
| title_fullStr | Sedimentary records and chronology of the late Pleistocene overbank flooding in the Yellow River source area, NE Tibetan Plateau |
| title_full_unstemmed | Sedimentary records and chronology of the late Pleistocene overbank flooding in the Yellow River source area, NE Tibetan Plateau |
| title_short | Sedimentary records and chronology of the late Pleistocene overbank flooding in the Yellow River source area, NE Tibetan Plateau |
| title_sort | sedimentary records and chronology of the late pleistocene overbank flooding in the yellow river source area ne tibetan plateau |
| topic | Tibetan Plateau Yellow River source area late Pleistocene environmental evolution overbank flooding |
| url | https://www.frontiersin.org/articles/10.3389/feart.2022.1021106/full |
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