人工岛建设对龙口湾表层沉积物粒度及黏土矿物组成特征的影响

发布时间：2017-12-27 11:32

本文关键词：人工岛建设对龙口湾表层沉积物粒度及黏土矿物组成特征的影响　出处：《海洋科学进展》2016年04期 　论文类型：期刊论文

【摘要】：通过对2013年采自龙口湾的表层沉积物样品进行激光粒度分析和X-射线衍射(XRD)分析,根据其表层沉积物粒度及黏土矿物组成分布特征,来探讨大规模人工岛建设对龙口湾表层沉积物粒度分布及黏土矿物组成特征的影响。结果表明,龙口湾沉积物粒度以粉砂为主(62.90%),黏土(18.05%)和砂(19.05%)的质量分数相近。龙口湾表层沉积物的黏土矿物组成与莱州湾整体沉积物组成相近,其不同组分质量分数表现为伊利石蒙皂石绿泥石高岭石,但个别矿物的含量仍存在一定差异。表层沉积物粒度分布及黏土矿物的组合特征表明,尽管龙口湾的沉积物仍以沿岸河流输沙、风沙和岛岸侵蚀为主,但沿岸大规模人工岛建设已对其组合特征产生重要影响。粒度组成上黏土质量分数略有升高,砂质量分数略有下降;黏土矿物组成上表现为蒙皂石的最大质量分数升高24.55%,绿泥石和高岭石的最大质量分数均下降35%左右,而伊利石质量分数最高且变化不大。通过对龙口湾表层沉积物粒度分布及黏土矿物组成特征的研究,可在一定程度上揭示大规模人工岛建设对龙口湾的沉积环境的影响。
[Abstract]:According to the 2013 collected samples of surface sediments from Longkou Bay by laser particle size analysis and X- ray diffraction (XRD) analysis, according to the composition and distribution of the surface sediment grain size and clay minerals, to investigate the impact of large-scale artificial island construction of Longkou Bay surface sediment grain size distribution and clay mineral composition characteristics. The results show that the grain size of Longkou Bay is mainly silty sand (62.90%), and the mass fraction of clay (18.05%) and sand (19.05%) is similar. Surface sediments of Longkou clay mineral composition and Laizhou Bay sediments are similar, the different mass fraction is illite smectite chlorite kaolinite mineral content, but there are still some differences in the individual. The particle size distribution of the surface sediments and the combination characteristics of clay minerals indicate that although the sediment of Longkou Bay is still dominated by sediment transport, wind sand and Island bank erosion along the coast, the construction of large-scale coastal island has had an important impact on its combination characteristics. The size composition of clay content increased slightly, the quality of the sand fraction decreased slightly; clay mineral composition showed the largest mass fraction of smectite increased 24.55%, the maximum mass fraction of chlorite and kaolinite decreased by about 35%, while the highest concentration of illite with little change. By studying the particle size distribution and clay mineral composition characteristics of surface sediments in Longkou Bay, we can reveal the influence of large-scale artificial island construction on the sedimentary environment of Longkou bay to a certain extent.
【作者单位】：青岛大学化学科学与工程学院;福建师范大学地理研究所湿润亚热带生态地理过程教育部重点实验室;中国科学院烟台海岸带研究所海岸带环境过程重点实验室;鲁东大学地理与规划学院;
【基金】：中国科学院重点部署项目——北方典型海岸带水动力变化和复合污染机制及其生态损害评估课题Ⅰ:人工填海、造岛对近岸水动力及物质输运的影响机制与数值模拟任务-填海工程影响下潮间带及邻近海域沉积环境变化研究(KZZD-EW-14);中国科学院“一三五”规划生态突破项目——黄河三角洲陆海界面过程、生态演变与修复技术课题Ⅰ:黄河水沙运移、沉积与生态演变(Y254021031) 国家自然科学基金项目——黄河口生态恢复工程对湿地氮循环关键生物地球化学过程的影响(41171424)和黄河口新生湿地系统碳氮循环关键过程队外源氮输入的响应(41371104)
【分类号】：P756.8;P736
【正文快照】： 4.鲁东大学地理与规划学院,山东烟台26402)龙口市入选山东半岛蓝色经济区核心区,但其发展明显受到陆域狭小、空间资源不足的限制,为解决该问题,保持经济的持续稳定增长,采用了人工岛式填海和区块组团式填海相结合的方式建设离岸人工岛群[1]。离岸人工岛群的建设势必会改变龙口

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