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| Grain size Characteristics of Coastal Aeolian Sediments in the Pingtan Island of Fujian, China, and their Implications for the Paleo-Environment from 150 ka BP to 20 ka BP |
| Wen Xiaohao1, Li Baosheng1,2, Meng Jie1, Yang Qingjiang1, Zheng Yanming3, Niu Dongfeng1, Wang Fengnian4, Cai Yuhang1 |
1. School of Geographical Science, South China Normal University, Guangzhou 510631, China;
2. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China;
3. Department of Geography and Tourism Management, Hanshan Normal University, Chaozhou, 521041, Guangdong, China;
4. Department of Tourism Management, Huizhou University, Huizhou 516007, Guangdong, China |
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Abstract Located on the Pingtan Island of eastern Fujian Province, the Baiqingxiang section consists of greyish-white to yellow aeolian sands(hereafter, "white aeolian sands") and red aeolian sands(hereafter, "old red sands") that alternate to some extent with red aeolian sands with an age of 150 to 20 ka BP. Our grain-size analyses showed that both the old red sands and the white aeolian sands are mainly sand grains, with minor silt and low clay contents. Their grain-size characteristics and parameters differ greatly from those of local modern beach sands, but are similar to those of modern aeolian sands, and both the old red sands and the white aeolian sands contain more silt and clay than modern aeolian sands. The alternation in their features suggests that the eastern coast of Fujian Province has experienced four warm-humid(W) periods and four cold-dry(C) periods from 150 to 20 ka BP:W4(133 to 117 ka BP), W3(108 to 99 ka BP), W2(84 to 67 ka BP), and W1(50 to 20 ka BP), and C4(150 to 133 ka BP), C3(117 to 108 ka BP), C2(99 to 84 ka BP), and C1(67 to 50 ka BP). These periods correspond well to the climate fluctuations recorded in the LR04 benthic stack curves, the 65 N summer solar radiation data, and relative sea-level changes. This suggests that sand deposition on China's southeastern coast has been subject to global climate factors, such as solar radiation, the East Asian monsoons, and sea-level fluctuations, at a scale of approximately 10 ka from 150 to 20 ka BP.
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Received: 22 December 2014
Published: 20 November 2015
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Cite this article:
Wen Xiaohao, Li Baosheng, Meng Jie, Yang Qingjiang, Zheng Yanming, Niu Dongfeng, Wang Fengnian, Cai Yuhang. Grain size Characteristics of Coastal Aeolian Sediments in the Pingtan Island of Fujian, China, and their Implications for the Paleo-Environment from 150 ka BP to 20 ka BP. JOURNAL OF DESERT RESEARCH, 2015, 35(6): 1473-1482.
URL:
http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2015.00072 OR http://www.desert.ac.cn/EN/Y2015/V35/I6/1473
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