摘要
浮游有孔虫Neogloboquadrinapachyderma(sin.)在北冰洋的古海洋学研究中已经得到广泛的应用。然而对该属种的研究主要集中在北冰洋的东部。本文对中国首次及第二次北极科学考察在北冰洋西部所采集的32个表层沉积物中N.pachyderma(sin.)壳体进行了稳定氧、碳同位素分析,并试图找出其与水团性质的关系。对北冰洋西部N.pachyderma(sin.)的研究显示,该属种主要生活在北冰洋西部30—100m水深范围,其壳体的δ18O差异在楚科奇海主要反映水体盐度和温度的差异,而在楚科奇海台、北风脊海域和加拿大海盆则主要反映水体盐度的差异。N.pachyderma(sin.)壳体的δ13C差异主要反映水体营养状况的差异,在楚科奇海中部其壳体δ13C的轻值反映低营养盐利用率,在北风脊东侧的加拿大海盆反映营养盐的再生环境,而在楚科奇海台和北风脊海域其壳体δ13C的重值反映低营养环境。
Planktonic foraminifer species Neogloboquadrina pachyderma （sin.） is widely used in paleoceanographic studies in the Arctic Ocean. However, studies on this species are mainly in the eastern Arctic Ocean. N. pachyderma （sin.） from 32 western Arctic Ocean surface sediment samples collected by the First and Second Chinese Arctic Expedition were analyzed for stable oxygen and carbon isotopes. In this paper we try to establish the relationship between the δ^18 O, δ^13 C and water properties.
Studies on N. pachyderma （sin.） indicate that this species mainly lives between 30 to 100 m water depth in western Arctic Ocean δ^18 O records of this species in the Chukchi Sea indicate the variations of water temperature and salinity, while in the Chukchi Plateau and eastern Northwind Ridge Canadian Basin, they mainly indicate the salinity difference. δ^13 C records of this species reflect the nutrient level of the water mass. Heavy δ^13 C in central Chukchi Sea and eastern Northwind Ridge Canadian Basin reveals the low nutrient usage in this area, while light δ^13 C in the Chukchi Plateau and Northwind Ridge indicates nutrient-poor environment in this area.
出处
《微体古生物学报》
CSCD
北大核心
2006年第4期361-369,共9页
Acta Micropalaeontologica Sinica
基金
国家重点基础研究发展规划项目(G200078500)
国家自然科学基金项目(Nos.40321603
40576029
40676030)
高等学校全国优秀博士学位论文作者专项资助(No.200126)
高等学校博士学科点专项科研基金(No.20040247028)资助项目。
