globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2013.07.026
论文题名:
Initiation of the Changjiang (Yangtze) delta and its response to the mid-Holocene sea level change
作者: Song B.; Li Z.; Saito Y.; Okuno J.; Lu A.; Hua D.; Li J.; Li Y.; Nakashima R.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 388
起始页码: 81
结束页码: 97
语种: 英语
英文关键词: Changjiang (Yangtze) delta ; Delta initiation ; Holocene ; Sea-level change ; Sedimentary facies
英文摘要: The Changjiang (Yangtze) delta in eastern China is one of the largest tide-dominated deltas in the world. To obtain a more detailed information on its initiation, we drilled three sediment cores, PK01, HG01 and XJ03, from the uppermost region of the delta plain. On the basis of sedimentary facies and AMS 14C dating, we identified three depositional systems: (1) a fluvial system, (2) an estuarine system, and (3) a deltaic system including an initial delta (estuary-delta transition) and a typical delta. The maximum flooding surface separates the estuarine and deltaic systems and occurred at ca. 8.0calkyr BP, when brackish water intruded landward and reached the Nanjing area. The Changjiang delta was initiated at the area between Nanjing and Yizheng when the sea-level rise decelerated after the rapid rise in sea level during 9.0-8.2calkyr BP.The subsequent evolution of the Changjiang delta has been shown as a seaward development model of river-mouth bars with shoreline migration. The oldest river-mouth bar called Hongqiao sand body, which is located most landward, was dated at 6.0-5.5. cal. kyr BP in this study, nearly one thousand years younger than the previous estimates. A tide-dominated, funnel-shaped estuary was formed at 8.0. cal. kyr BP, and lasted until the Hongqiao sand bar became exposed. This stage is regarded as an aggradation-dominated initial stage of the Changjiang delta, followed by a progradation-dominated stage that is characterized by the formation of a series of seaward migrating river-mouth bars. A relative sea level highstand in the mid-Holocene may be associated with glacio-hydro-isostatic tilting © 2013 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69617
Appears in Collections:过去全球变化的重建

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作者单位: State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China; Geological Survey of Japan, AIST, Central 7, Higashi 1-1-1, Tsukuba 305-8567, Japan; National Institute of Polar Research, 10-3, Midoricho, Tachikawa, Tokyo 190-8518, Japan; Graduate School of Environmental Studies, Nagoya University, Fur-cho, Chikusa, Nagoya 464-8601, Japan; Yunnan Institute of Environmental Science, No. 23 Wang Jiaba, Kunming 650034, China; School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China

Recommended Citation:
Song B.,Li Z.,Saito Y.,et al. Initiation of the Changjiang (Yangtze) delta and its response to the mid-Holocene sea level change[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,388
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