| 南海东北部末次冰期以来沉积环境演变 |
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| 引用本文： | 黄元辉,蓝东兆.南海东北部末次冰期以来沉积环境演变[J].海洋通报(英文版),2007,9(1):46-54. |
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| 作者姓名： | 黄元辉 蓝东兆 |
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| 作者单位： | 1. 华东师范大学地理系,上海,200062
2. 国家海洋局第三海洋研究所海洋与海岸地质环境开放实验室,福建,厦门,361005 |
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| 基金项目： | Acknowledgements We thank Prof. Chen Chenghui for his helpful suggestions and Lan Binbin for his assistances in the pretreatment of the diatom analysis samples. This study was supported by the open fund of Key Laboratory of Marine Sedimentology and Environmental Geology, State 0ceanic Administration （Grant No. MASEG200401）. |
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| 摘 要： | 利用南海东北部上陆坡处所取的D孔(21°23′02″N,116°47′13″E,水深405m)进行硅藻分析,结合粒度分析与碎屑矿物分析结果,探讨该海域末次冰期以来沉积环境演变过程。结果表明:粒度与硅藻分析结果较为吻合,共同显示D孔可分为上下两层,上层(0-2cm)的砂质沉积层为经冰后期海进过程改造的晚更新世残留沉积层;下层(2-130cm)主要是末次冰期形成的浅海沉积。整个柱样可反映出海洋同位素MIS4期海退至MIS3期海进与MIS2期海退至冰后期海进的沉积韵律。
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| 关 键 词： | 硅藻 粒度分析 沉积环境 末次冰期 南海东北部 |
| 修稿时间： | 2006-04-17 |
Development of Sedimentary Environment in the Northeastern South China Sea Since the Last Glacial Stage |
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| HUANG Yuanhui,LAN Dongzhao.Development of Sedimentary Environment in the Northeastern South China Sea Since the Last Glacial Stage[J].Marina Science Bulletin,2007,9(1):46-54. |
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| Authors: | HUANG Yuanhui LAN Dongzhao |
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| Institution: | 1. Department of Geography, East China Normal University, Shanghai 200062, China ;2. Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, Fujian, China |
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| Abstract: | Core D(21°23′02″N,116°47′13″E, water depth 405 m)was sampled from the upper slope from the northeastern South China Sea (SCS) and applied to analyze the sedimentary environmental change in this sea area since the last glacial stage. The results of grain size analysis, diatom analysis and detrital mineral analysis were well matched. We divided the core D into two layers. The surface sand layer (0 - 2 cm) consisted of residual sediments, which might be originally the sediment in the late Pleistocene and later suffered from being transformed in the post glacial transgression. The lower layer (2 - 130 cm) was quite different from the surface one, which might mainly result from a neritic sedimentary environment in the last glacial stage. Two sedimentary cycles could be detected in the core D: regression during Marine isotope stage (MIS) 4 to transgression during MIS 3 and regression during MIS 2 to transgression during the post glacial. |
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| Keywords: | diatom grain size sedimentary environment the last glacial stage the northeastern South China Sea |
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