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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 foraminifera Neogloboquadrinapachyderma (sin.) Has been widely used in paleoceanographic studies of the Arctic Ocean. However, the study of the genus mainly concentrated in the eastern Arctic Ocean. In this paper, the stable oxygen and carbon isotopes of 32 samples of 32 surface sediments collected in the western Arctic Ocean from China’s first and second Arctic scientific expeditions were studied. Relationship. Studies of N. pachyderma (sin.) In the western Arctic Ocean show that the genus mainly lives in the water depth of 30-100 m in the western Arctic Ocean. The δ18O difference in the shell of the genus mainly reflects the difference in salinity and temperature in the Chukchi Sea In the Chukchi Sea platform, the northern wind ridge and the Canadian Basin mainly reflect the differences in salinity. The difference of δ13C in N. pachyderma (sin.) Shell mainly reflects the difference in nutrient status of water body. The slight value of δ13C in shell of central Chukchi Sea reflects the utilization of low nutrient, which is reflected in the Canadian basin to the east of north ridge Nutrient regeneration environment, while the δ13C values of the shell in the Chukchi Sea platform and the north wind ridge reflect the low nutrient environment.