| 摘要: |
| 以盘锦港荣兴港区海底表层沉积物为主要研究对象，通过对不同位置表层沉积物样品的粒度特征进行对比，探讨该区的沉积环境。利用贝克曼库尔特激光粒度仪对其粒度进行了检测，并计算了粒度参数，结果表明：本区7个沉积物样品以粉砂、砂为主，样品平均粒径值介于3.19～5.46Φ。分选性为较差-很差。样品偏度表现为正态-极正偏。峰度的等级为平坦-尖锐。借助Weibull函数计算出了样品2个组分的众数值和百分含量，粒度像图显示样品的初始水动能普遍较大，只是平均水动能存在差异。说明：沉积区的物源距离较近，物质来源比较稳定，以陆源沉积为主，沉积主要受辽河和大辽河控制；在河流沉积作用为主的大背景下，研究区东北部的沉积环境受潮流的影响比较大，中西部则受剥蚀作用影响较大。 |
| 关键词: 粒度分析 海底表层 沉积环境 盘锦港 |
| DOI： |
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| 基金项目:辽宁师范大学开放实验室资助项目. |
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| Grain Size Characteristics and Sedimentary Environment of Surface Sediments in Panjin Harbor |
| WANG Xu,ZHANG Ge |
| Liaoning Normal University;Heilongjiang University of Science and Technology |
| Abstract: |
| Based on the study of the surface sediments of the Panjin port,the surface sediments of different locations were compared to discuss the sedimentary environment.The particle size was measured by Beckman Kurt laser particle size analyzer,grain size parameters,and the calculation results showed that the average particle size of 7 sediment samples in this area of silt and sand samples is 3.19~5.46,whose sorting is poor-very poor,the samples skewness performance is normal to very positive bias and rating of flat-sharp for the kurtosis.With the help of Weibull function,the numerical values and percentage values of the 2 components of the samples are calculated.The particle size image shows that the initial kinetic energy of the sample is larger,but the average kinetic energy of the sample is different,which demonstrates that the distance between source materials of sedimentary provenance is close and relatively stable,the terrigenous sediments deposited are mainly controlled by Liaohe River and Daliaohe River.Under the background of river sedimentation,the influence of sedimentary environment of the study area in the northeast by the trend is relatively large,and the midwest is greatly affected by denudation. |
| Key words: Particle size analysis,Sea surface layer,Depositional environment,Panjin port |
