| 摘要: |
| 辽东湾是渤海的三大湾之一,进入该区的主要河流有辽河、大凌河、滦河和六股河等，水深一般在10.2-35m之间，沉积环境很复杂。测定、研究该区现代沉积速率和沉积通量对沉积动力学的研究和海洋油气开发工程都有意义。
近年来,国内外学者在利用210Pb法测定江河、湖泊和海洋陆架的沉积速率等方面取得了有价值的成果。到目前为止,除在渤海锦州湾测得两个岩芯的沉积速率外(夏明等，1983),关于辽东湾大面积海域的现代沉积速率和沉积通量还未见报道。本文介绍了该区现代沉积速率和沉积通量,利用210Pb的垂直剖面,探讨该区近百年来的沉积作用和沉积环境,划分了沉积强度区。 |
| 关键词: 渤海辽东湾、现代沉积速率、沉积通量 |
| DOI： |
| 分类号: |
| 基金项目:中国科学院海洋研究所调查研究报告第1709号 |
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| THE RECENT SEDIMENTATION RATES AND SEDIMENT FLUX IN THE LIAODONG BAY |
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Li Fengye, Yuan Wei
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Institute of Oceanology, Academia Sinica
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| Abstract: |
| The recent sedimentation rates and sediment flux based on 210Pb activity of five sediment cores in the Liaodong Bay have been determined. 210Pb dating shows that the low rate of sedimentation is about 0.068 cm/a and the high rate of sedimentation is about 1.39 cm/a. The flux of sediment is from 0.082 to 1.60 g/(cm2.a).210Pb distribution, which is controlled by material source and hydrographic condition,is reflective of the sedimentation and the sedimentary envi-ronments in the last hundred years. Using the 210Pb dating, the sedimentation rates and material source in the Liaodong Bay have been discussed. |
| Key words: RECENT SEDIMENTATION RATES ,SEDIMENT FLUX,LIAODONG BAY |
