| 渤海湾西北岸中全新世埋藏牡蛎礁的硅藻记录及古环境意义 |
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| 引用本文： | 李冬玲,范昌福,黄玥,蒋辉,王宏,商志文.渤海湾西北岸中全新世埋藏牡蛎礁的硅藻记录及古环境意义[J].海洋通报,2009,28(3). |
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| 作者姓名： | 李冬玲 范昌福 黄玥 蒋辉 王宏 商志文 |
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| 作者单位： | 1. 华东师范大学地理系,上海,200062
2. 天津地质矿产研究所,天津,300170 |
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| 摘 要： | 通过对渤海湾西北岸大吴庄牡蛎礁壳体内部的泥质填充物中硅藻组合的研究,试图探讨该区沉积硅藻组合变化指示的礁体古气候环境变化.分析结果表明,在 7 200～5 600 cal. a BP 整个礁体建造期间,沿岸种 Cyclotella stylorum 是含量最丰富的硅藻种类,其与海水种 Thalassionema nitzschioides 的含量变化指示了礁体生长区河流径流与海水相互作用的强弱波动,主要包括三个阶段:7 200～6 500 cal. a BP,礁体建造初期,礁体受海水影响显著;6 500～5 720 cal. a BP,礁体建造中期,礁体生长区的盐度降低,海水作用减弱,淡水作用增强;5 720～5 600 cal.a BP,礁体建造结束期,礁体生长区的盐度显著降低,礁体受海水影响进一步减弱.
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| 关 键 词： | 渤海湾 中全新世 牡蛎礁 古环境 硅藻 |
Paleo-environmental Reconstruction with Diatom Assemblages in the Buried Oyster Reef on the Northwest Coast of the Bohai Bay During the Middle Holocene |
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| LI Dong-ling,FAN Chang-fu,HUANG Yue,JIANG Hui,WANG Hong,SHANG Zhi-wen.Paleo-environmental Reconstruction with Diatom Assemblages in the Buried Oyster Reef on the Northwest Coast of the Bohai Bay During the Middle Holocene[J].Marine Science Bulletin,2009,28(3). |
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| Authors: | LI Dong-ling FAN Chang-fu HUANG Yue JIANG Hui WANG Hong SHANG Zhi-wen |
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| Institution: | 1. Department of Geography;East China Normal University;Shanghai 200062;China;2. Tianjin Institute of Geology and Mineral Resources;Tianjin 300170;China |
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| Abstract: | With the analysis of the diatom assemblage in the muddy deposition, which were filled in the two valves of oyster shells in the buried oyster reef at Dawuzhuang, the reconstruction of the paleo-environmental change recorded by the whole reef during 7 200 to 5 600 cal. a BP is studied. The littoral species Cyclotella stylorum is the dominated diatom during the whole reef buildup, and the amount of Cyclotella stylorum fluctuant B opposite with the neritic species Thalassionema nitzschioides. The increase or d... |
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| Keywords: | Bohai Bay middle holocene oyster reef palaeoenvironment diatom |
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