| 摘要: |
| 1997年2月在东海北部取得悬浮体和底质样品，通过粒度分析和扫描电镜及能谱分析，探讨了陆架北部泥质区悬浮体的絮凝沉积作用。结果表明，生物因素是泥质区悬浮体的发生絮凝的机制之一，可影响悬浮体在海水中的行为。生物活动产生的软组织、分泌物和粘膜等有机质可将矿物碎屑和生物骨屑粘结、吸附和捕集在一起形成絮凝体而迅速沉积。在悬浮体含量较低、水化学环境相对稳定的东海陆架，絮凝作用是泥质区得以形成的关键过程之一。 |
| 关键词: 悬浮体 絮凝 东海陆架 泥质区 沉积作用 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金重点资助项目，49136140及49676289号 |
附件 |
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| SEDIMENTATION WITH AGGREGATION OF SUSPENDED SEDIMENT IN A MUD AREA OF THE NORTHERN EAST CHINA SEA |
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LEI Kun, YANG Zuo Sheng, GUO Zhi Gang
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College of Marine Geoscience, Ocean University of Qingdao, Qingdao,266003
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| Abstract: |
| Based on grain size analyses and observations with an SEM, sedimentation in response to aggregation of suspended material in a mud area of the northern East China Sea are studied. The results show that suspended sediment in the mud area become much finer after organic matter contained is removed. The organic matter is closely related to biological activities in the mud area. Biological activities supply biogenic matter for the mud area. The organic matter like mucus, secretion or organic films that are produced in biological activities can aggregate suspended particles (terrigenous detritus and biogenic detritus) by means of absorbing, agglutinating and or trapping. With this process, grain sizes of suspended sediment increase and it is much easier for suspended material to settle down to the sea floor. Therefore, aggregation is a key and significant process for the sedimentation of suspended material and the formation of the mud area, which has a small concentration of suspended sediment and is far from the land-source area. |
| Key words: Suspended sediment, Aggregation, The continental shelf of East China Sea, The mud area, Sedimentation |
