海南岛近岸沉积物中的有孔虫特征与分布  

FORAMINIFERAL CHARACTERISTICS AND DISTRIBUTION IN THE SEA SURFACE SEDIMENTS NEAR HAINAN ISLAND

作　　者：李保华[1] 王晓燕[1] 龙江平[2] 

机构地区：[1]中国科学院南京地质古生物研究所,南京210008 [2]国家海洋局第二海洋研究所,杭州310012

出　　处：《微体古生物学报》2008年第3期225-234,共10页Acta Micropalaeontologica Sinica

基　　金：国家自然科学基金(40276012);国家重点基础研究发展计划项目(2007CB815902);中国近海海洋综合调查与评价(908)项目联合资助

摘　　要：对位于海南岛近岸7—170m水深、180个站位沉积物表层样的有孔虫分析表明,研究区浮游有孔虫类型较少、共发现浮游有孔虫19种,单个站位最多含有浮游有孔虫16种,而且浮游有孔虫含量(丰度)亦较低。底栖有孔虫则较为丰富,仅在较粗砂中底栖有孔虫丰度相对较低。常见近40多个底栖有孔虫属种,多数样品中以含有螺旋式与平旋式玻璃质底栖有孔虫为主,少数样品以胶结壳、列式玻璃质壳或大型底栖有孔虫为优势特征。本研究在详细阐述了底栖有孔虫主要特征属种的基础上进行了有孔虫分区,从而揭示其所包含的环境意义。Foraminifera from 180 surface sediments taken from 7 to 170 m sea water depth near Hainan Island were quantitatively analyzed. Planktonic foraminifera have a low diversity and low abundance in these samples; even can not be found in some samples. There are total 19 planktonic foraminiferal species in all these samples, with the highest 16 species in one sample. However, the benthic foraminifera are abundant, only less in some coarse sand samples. There are more than 40 common benthic foraminiferal species found, most characterized by Rotaliina （planospiral or trochospiral）. Only several samples are mainly composed of Textulariina, Miliolina or large benthic foraminiferal species. The distributions of main benthic foraminifera were detailedly analyzed. In addition to the sea water temperature （a warm water mass）, the water depth is suggested to be the most important environmental factor which influences the foraminiferal fauna in the study area.

关 键 词：有孔虫 近岸环境 表层沉积物 海南岛 南海 

分 类 号：Q915[天文地球—古生物学与地层学]