| 黄海、渤海铅-210沉积速率的分布特征及其影响因素 |
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| 引用本文： | 胡邦琦,李国刚,李军,杨敏,王利波,布如源.黄海、渤海铅-210沉积速率的分布特征及其影响因素[J].海洋学报,2011,33(6):125-133. |
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| 作者姓名： | 胡邦琦 李国刚 李军 杨敏 王利波 布如源 |
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| 作者单位： | 1.国土资源部 海洋油气资源和环境地质重点实验室,山东 青岛 266071;青岛海洋地质研究所,山东 青岛 266071 |
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| 基金项目： | "我国近海海洋综合调查与评价"专项(908-01-CJ04;908-01-CJ05);国家自然科学基金项目(40976036;40906033);海洋公益性行业科研专项(200805063-5)。 |
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| 摘 要： | 对黄海、渤海17个箱式柱样进行了210Pb放射性活度测定,计算了近百年来210Pb沉积速率,并结合前人资料对黄海、渤海区210Pb沉积速率的空间分布特征及其影响因素进行探讨,结果表明,黄河口附近站位沉积速率最高(＞2 cm/a),而在渤海中部、渤海湾以及山东半岛沿岸的站位沉积速率较小(≈0.5 cm/a),部分站位沉积...
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| 关 键 词： | 黄海、渤海 铅-210沉积速率 黄河 沉积物运移 |
| 收稿时间： | 2010/10/9 0:00:00 |
| 修稿时间： | 4/7/2011 12:00:00 AM |
Spatial variability of the 210Pb sedimentation rates in the Bohai and Huanghai Seas and its influencing factors |
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| HU Bang-qi,LI Guo-gang,LI Jun,YANG Min,WANG Li-bo and BU Ru-yuan.Spatial variability of the 210Pb sedimentation rates in the Bohai and Huanghai Seas and its influencing factors[J].Acta Oceanologica Sinica (in Chinese),2011,33(6):125-133. |
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| Authors: | HU Bang-qi LI Guo-gang LI Jun YANG Min WANG Li-bo and BU Ru-yuan |
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| Institution: | 1.Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and Resources, Qingdao 266071, China;Qingdao Institute of Marine Geology,Qingdao 266071, China2.Marine Engineering and Prospecting Institute of North China Sea, North Sea Branch, State Oceanic Administration, Qingdao 266033, China |
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| Abstract: | A total of 17 box-cores, collected from the Bohai and Huanghai Seas (BHS), were studied to investigate the sedimentation rate (SR) using the 210Pb geochronology.The results show that the SRs at the offshore of Huanghe Delta show the highest values(＞2 cm/a), whereas the SRs are always lower than 0.5 cm/a in the Bohai Gulf, the central Huanghai.Combined with the previous studies, the distribution pattern of the 210Pb SR in the BHS is obtained, which is mainly controlled by the riverine sediment supply and the marine dynamics conditions.The high SRs are found in the mouths of rivers surrounding the BHS, whereas the offshore areas are characterized by the low SRs. In the northern Shandong Peninsula, the isoline of SRs extended northeastward and decreased stepwise, with the lowest SR areas located at the east Chengshantou. The SRs displayed a concave-like type in the southern Huanghai Sea (SHS), with higher SR on both sides and lower in the central area.In the southwest SH, a ligule-like isoline of SRs extended toward the central SHS. Based on the distribution pattern of the 210Pb SR in the southern Bohai and Huanghai Seas, the dispersal pattern of the Huanghe sediments can be illustrated. Most of the Huanghe sediments were deposited within the coastal area. However, small parts of the Huanghe sediments were transported along the northern Shandong Peninsula and through the Bohai Straits into the northern Huanghai Sea. Furthermore, in the SHS, the distribution of the Huanghe sediments may be limited in the west of 123 E areas, whereas the Korean riverine sediments in the east of 125°E, which may be related to the ocean fronts in the southern Huanghai Sea. |
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| Keywords: | Bohai and Huanghai Seas lead-210 geochronology Huanghe River sediment dispersal |
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