曹妃甸近岸海域表层沉积物粒度特征及其沉积环境

发布时间：2018-03-23 06:27

本文选题：曹妃甸　切入点：沉积物　出处：《矿物岩石地球化学通报》2016年03期 　论文类型：期刊论文

【摘要】：为探讨河北曹妃甸人工填海对近岸海域沉积环境及水动力条件的影响,对该区沉积物粒度特征进行了研究。利用LS13320系列激光粒度分析仪对13个站位沉积物粒度进行测试,分析了其粒级组成与特征参数。结果表明,研究区分为3个岩性区:北部海域潮间带沉积物以砂质粉砂为主;中部工业区周围海域沉积物偏粗,以粉砂质砂为主;南部沿岸海域沉积物较细,以黏土质粉砂为主。沉积物平均粒径介于2.94~6.87Φ,粒级组分为黏土、粉砂和砂,质量分数平均值分别为18.16%、52.30%和29.53%。粒度频率曲线偏态Ski为0.07~0.81,峰态Kg为0.63~2.21,自北向南,由单峰逐渐过渡为主峰或弱峰,与2007年人工填海初期沉积环境相比,沉积物类型变单一、组分粗化,表明人工填海工程对曹妃甸近岸海域沉积环境是有影响的。
[Abstract]:In order to investigate the effect of artificial reclamation in Caofeidian, Hebei Province, on the sedimentary environment and hydrodynamic conditions in the coastal waters, the grain size characteristics of sediments in this area were studied. The grain size of sediment at 13 stations was measured by LS13320 series laser particle size analyzer. The grain size composition and characteristic parameters are analyzed. The results show that the study is divided into three lithologic areas: the sandy silt is the main sediment in the intertidal zone of the northern sea area, the coarse sediment is mainly silty sand in the sea area around the central industrial area, and the silty sand is the main sediment in the middle industrial area. The sediments in the southern coastal area are fine, mainly clay silty sand. The average diameter of sediment is between 2.94 and 6.87 桅, and the grain size is composed of clay, silt and sand. The average mass fraction was 18.16% 52.30% and 29.53%, respectively. The grain size frequency curve deviated Ski was 0.07 ~ 0.81, and peak K _ g was 0.63 ~ 2.21. From north to south, the sediment type changed from single peak to main peak or weak peak. Compared with the initial sedimentary environment of artificial reclamation in 2007, the sediment type became single. The coarsening of components indicates that artificial reclamation works have an effect on the sedimentary environment of Caofeidian inshore.
【作者单位】：天津科技大学天津市海洋资源与化学重点实验室;
【基金】：天津市蓬莱19-3油田溢油事故补偿款项目(19-3BC2014-05)
【分类号】：P736.21

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