| 南黄海辐射沙洲中心沿岸晚更新世以来的沉积环境演变 |
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| 引用本文： | 朱晓东,任美锷,朱大奎.南黄海辐射沙洲中心沿岸晚更新世以来的沉积环境演变[J].海洋与湖沼,1999,30(4):427-434. |
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| 作者姓名： | 朱晓东 任美锷 朱大奎 |
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| 作者单位： | 南京大学海岸与海岛开发国家试点实验室!南京，210093，南京大学海岸与海岛开发国家试点实验室!南京，210093，南京大学海岸与海岛开发国家试点实验室!南京，210093 |
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| 基金项目： | 国家自然科学基金!49236120，南京大学海岸与海岛开发国家试点实验室成果!SCIEL21199104 |
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| 摘 要： | 对南黄海辐射沙洲中心沿岸地区两个钻孔采用高密度、定量采样方法进行有孔虫和沉积分析。结果表明，该地区晚更新世晚期可能发育了古长江河道、河口、河流边滩或河漫滩以及泛滥平原乃至泛滥湖沼等陆相沉积环境。进入全新世，则先后依次出现了潮滩、河口、潮滩、潮流沙体和潮滩，及至最终成陆。
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| 关 键 词： | 辐射沙洲 钻孔分析 有孔虫 古环境 南黄海 |
| 收稿时间： | 1997/10/8 0:00:00 |
| 修稿时间： | 1998/12/16 0:00:00 |
CHANGES IN DEPOSITIONAL ENVIRONMENTS IN THE AREA NEAR THE CENTER OF THE NORTH JIANGSU RADIAL BANKS SINCE THE LATE PLEISTOCENE |
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| ZHU Xiao-dong,REN Mei-e and ZHU Da-kui.CHANGES IN DEPOSITIONAL ENVIRONMENTS IN THE AREA NEAR THE CENTER OF THE NORTH JIANGSU RADIAL BANKS SINCE THE LATE PLEISTOCENE[J].Oceanologia Et Limnologia Sinica,1999,30(4):427-434. |
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| Authors: | ZHU Xiao-dong REN Mei-e and ZHU Da-kui |
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| Institution: | State pilot Lab of Coast and Island Exploitation, Nanjing University, Nanjing, 210093;State pilot Lab of Coast and Island Exploitation, Nanjing University, Nanjing, 210093;State pilot Lab of Coast and Island Exploitation, Nanjing University, Nanjing, 210093 |
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| Abstract: | The North Jiangsu Radial Banks (NJRB) on the irmer shelf of the southwestem Yellow Sea is one of the largest sand bank systems in the world. Its origin has been debated for over a decade. The major disapreement lies in tha whether or not the ancient Changiiang fover once ran through the radial central area of the NJRB. Based on foeamiferal and sedimentological analysis of tWo coastal cores collected from the fadial central area of the NJRB, the following scenallo of the ancient environmnt is suggested. During the lare pleistocene, the sedimenop environmnt was nonmallne. Forminifera appeared only in the bottom sechon, indicating an estuarine (the ancient Yangtze fover) environment. Then there was a fluvial sedimenop environment,distant from the river mouth, namely beyond the hdal lithet. Within the deposits no marine fossils were foun. The subenvironmnt mny have included river channels, bank flats, flood plains and lakes. The hard dark green mud may have resulted from a flood plain or lacustrine environment. The Holocene sediment record represents searelared environmnts. The environment evolved from a hdal flat at the begiedng of the Holocene to estuarine bay and neanshore environments, sindlar to the present hdal sandbank environmnt. Hnally, the area changed into hdal flso and eventually became land. The results suggest that the NJRB may have a sediment sorwe from the lare pleistocene Changjiang River delta. |
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| Keywords: | Radial sand banks Core analysis Foraminifera Paleo-environment |
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