山东半岛东北部海域表层沉积物底栖有孔虫分布特征及影响因素

    Distribution characteristics and influencing factors of benthic foraminifera in surface sediments in the northeastern sea area of Shandong Peninsula

    • 摘要: 有孔虫是海洋环境及其演化研究中最广泛的微体古生物类群,在海洋环境指示方面有重要意义。本文对山东半岛东北部海域表层沉积物中有孔虫分布特征进行了统计分析,研究区以底栖有孔虫为主。根据因子分析结果将研究区底栖有孔虫分为4个组合,组合1为Verneuilinulla advena-Astrononion gallowayi-Cribrononion gnythosuturatum,组合2为Astrononion gallowayi-Buccella frigida-Elphidium advenum,组合3为Hanzawaia convexa-Buccella frigida-Cribrononion subincertum,组合4为Rotalinoides compressiuscula-Elphidium advenum-Ammonia ketienziensis。对影响研究区内底栖有孔虫的环境因素进行了研究,发现海水温度、盐度、水深、沉积物粒度、沿岸海流以及冷水团对其分布存在一定程度的影响。

       

      Abstract: Foraminifera are the most widely studied micropaleontological group in marine environment and has important significance in marine environment indication. In this paper, the distribution of foraminifera in surface sediments near Shandong Peninsula is described. The study area is dominated by benthic foraminifera. The result of factor analysis, showed that the benthic foraminifera in the study area could be divided into four assemblages. Assemblages 1 is Verneuilinulla advena-Astrononion gallowayi-Cribrononion gnythosuturatum, Assemblages 2 is Astrononion gallowayi-Buccella frigida-Elphidium advenum, Assemblages 3 is Hanzawaia convexa-Buccella frigida-Cribrononion subincertum, and Assemblages 4 is Rotalinoides compressiuscula-Elphidium advenum-Ammonia ketienziensis. We found that the environmental factors on the foraminiferal distribution in the study area included sea temperature, salinity, depth, grain size, coastal current and the North Yellow Sea Cold Water Mass.

       

    /

    返回文章
    返回