| 长江口水下三角洲沉积物记录的古环境演化 |
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| 引用本文： | 张瑞虎,谢建磊,刘韬,赵宝成.长江口水下三角洲沉积物记录的古环境演化[J].海洋地质与第四纪地质,2011(1):1-10. |
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| 作者姓名： | 张瑞虎 谢建磊 刘韬 赵宝成 |
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| 作者单位： | 华东师范大学地理系;淮阴师范学院城市与环境学院;上海市地质调查研究院; |
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| 基金项目： | 上海市科委科技攻关项目(09231203300) |
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| 摘 要： | 长江口水下三角洲60 m的HYZK5钻孔,揭示了末次冰期以来河流相、滨海湖沼相、河口湾-浅海相(前三角洲相)和水下汉道相的沉积环境演化.泥炭层形成于末次冰期的冷湿气候环境;有孔虫丰度的变化反映了12 000 cal.aBP以来海平面迅速上升,但在11 200～10 000 cal.aBP出现短暂的停顿.沉积物的粒度、磁...
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| 关 键 词： | 古环境 磁化率 有机元素 有孔虫丰度 长江口 水下三角洲 |
PALAEOENVIRONMENTAL EVOLUTION OF SUBAQUEOUS YANGTZE DELTA INFERRED FROM SEDIMENTARY RECORDS |
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| ZHANG Ruihu,XIE Jianlei,LIU Tao,ZHAO Baocheng.PALAEOENVIRONMENTAL EVOLUTION OF SUBAQUEOUS YANGTZE DELTA INFERRED FROM SEDIMENTARY RECORDS[J].Marine Geology & Quaternary Geology,2011(1):1-10. |
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| Authors: | ZHANG Ruihu XIE Jianlei LIU Tao ZHAO Baocheng |
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| Affiliation: | ZHANG Ruihu1,2,XIE Jianlei3,LIU Tao1,ZHAO Baocheng3(1 Department of Geography,East China Normal University,Shanghai 200062,2 School of Urban and Environmental Science,Huaiyin Normal University,Huaian,Jiangsu 223001,3 Institute of Shanghai Geological Survey,Shanghai 200092) |
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| Abstract: | A ~60 m long core HYZK5 was taken from the subaqueous Yangtze River delta.It consists of fluvial,coastal marsh,estuarine-shallow marine(prodelta)and distributary facies deposited since the latest glacial maximum.Peat was formed during the last glaciation when the climate was cold and wet.Foraminifera abundance shows that sea level had risen rapidly since 12 000 cal.aBP,but paused during 11 200 ~ 10 000 cal.aBP.The data of grain size,magnetic susceptibility,organic carbon and nitrogen show obvious variations... |
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| Keywords: | palaeo-environment magnetic susceptibility organic elements foraminifera abundance Yangtze River Estuary subaqueous delta |
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