珠江口盆地表层沉积物浮游有孔虫含量与水深关系定量研究

QUANTITATIVE RESEARCH OF PLANKTONIC FORAMINIFERA CONTENT(IN THE SURFICIAL SEDIMENT)RELATED TO WATER DEPTH IN THE ZHUJIANG (PEARL)RIVER MOUTH BASIN

本文对珠江口盆地１００多个表层沉积物样品进行详细的研究，排除了含明显再沉积类型的样品后，对剩余的８２个样品进行定量分析，并对鉴定结果进行计算机模似。表明该区水深Ｄ与浮游有孔虫占整个有孔种群的个体百分含量Ｐ％之间存在如下关系：ｌｎ（Ｄ）＝３．３２＋０．０２４３Ｐ该关系适用水深浅于３１４ｍ的海区。水深区２５０ｍ以内的海区，随水深的加深，浮游有孔虫的含量迅速增加；水深超过２５０ｍ之后，浮游有孔虫渐趋稳定。

we studied more than 100 samples collected from the surface of the Zhujiang RiverMouth Basin.After taking out the reworked samples,the rest 82 samples were quantita-tively analysed. The relation between the content of planktonic foraminifera(p%)andthe depth of water in this area can be described by:In(D)=3.32+0.0243p.This equa-tion works at <314m water depth.Planktonic foraminifera content increases rapidly at<250m depth,and grades intostable situation from 250m down.