| 黏粒和有机质对黄河口潮间带沉积物微团聚体的影响 |
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| 引用本文： | 陈友媛,赵文娟,贾永刚,许国辉.黏粒和有机质对黄河口潮间带沉积物微团聚体的影响[J].海洋地质与第四纪地质,2009(1). |
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| 作者姓名： | 陈友媛 赵文娟 贾永刚 许国辉 |
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| 作者单位： | 中国海洋大学环境科学与工程学院;中国海洋大学海洋环境与生态教育部重点实验室; |
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| 基金项目： | 国家自然科学基金项目(40606020);;国家高新技术研究发展计划(2008AA09Z109) |
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| 摘 要： | 微团聚体是形成沉积物结构的基本单元,沉积物的结构性影响了土体的稳定性、渗透性和强度等工程地质性质。对废弃黄河口刁口流路潮间带沉积物微团聚体受黏粒含量、有机质和生物黏液等胶结作用进行分析,结果表明,研究区沉积物多团聚成粉粒级微团聚体(0.05～0.01 mm),含量在85.3%～95.8%之间,与黄土高原土相比,0.05～0.01 mm微团聚体增加,而0.1～0.05 mm微团聚体减少,团聚性差,易于侵蚀;黏粒含量与团聚度表现出显著正相关性,说明黏粒含量增加了沉积物微团聚体的稳定性;沉积物中有机质含量在0.27%～0.61%之间,有机质含量较少,对沉积物微团聚体贡献少;生物扰动的螃蟹洞壁土、螃蟹掘出物的团聚度明显大于表层未受生物扰动土的团聚度,说明螃蟹分泌的黏液能加大微团聚体的稳定性。
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| 关 键 词： | 微团聚体 黏粒 有机质 生物黏液 黄河口 |
THE INFLUENCE OF CLAY AND ORGANIC MATTER ON THE SEDIMENT AGGREGATION IN THE YELLOW RIVER ESTUARY |
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| CHEN Youyuan,ZHAO Wenjuan,JIA Yonggang,XU Guohui.THE INFLUENCE OF CLAY AND ORGANIC MATTER ON THE SEDIMENT AGGREGATION IN THE YELLOW RIVER ESTUARY[J].Marine Geology & Quaternary Geology,2009(1). |
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| Authors: | CHEN Youyuan ZHAO Wenjuan JIA Yonggang XU Guohui |
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| Institution: | CHEN Youyuan1,2,ZHAO Wenjuan1,JIA Yonggang1,XU Guohui1,2 |
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| Abstract: | Aggregation is a basic unit to form sediment structure.The structure of sediments impacts on the stability,infiltration and strength of engineering geologic properties.A study was implemented in the abandoned riverway of Yellow River Estuary,Diaokou,on the influence of clay,organic matter and biologic EPS(extracellular polymeric substances) on the aggregation.The results indicate that the sediments mainly become 0.05~0.01 mm aggregation.The content of the aggregation is between 85.3% and 95.8%.Compared with... |
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