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通过对白令海和北冰洋楚科奇海 39个表层沉积样品中有孔虫的定量分析 ,发现表层沉积中浮游有孔虫稀少可能与该区表层生产力低、碳酸盐溶解作用较强有关 ,而底栖有孔虫的分布则主要受表层初级生产力以及与水深相关的碳酸盐溶解作用和水团性质所控制 ,其中北冰洋楚科奇海陆架区有孔虫以Elphidiumspp .组合和Nonionellarobusta组合为主 ,丰度和分异度低 ,受北冰洋沿岸水团控制 ;白令海陆坡区有孔虫以Uvigerinaperegrina -Globobuliminaaffinis组合为主 ,含N .robusta较多 ,丰度和分异度相对高 ,受太平洋中层和深层水团控制 ,但该区碳酸盐溶跃层和补偿深度 (CCD)相对浅 ,约分别位于 2 0 0 0和 380 0m处 .此外 ,白令海陆坡上部表层沉积中含有北冰洋陆坡区典型深水底栖有孔虫种Stetsoniaarctica ,说明白令海峡两侧的海区曾有深部水交流 .
Based on the quantitative analysis of foraminifera in 39 surface sedimentary samples in the Bering Sea and the Arctic Ocean in the Chukchi Sea, it was found that the rarefaction of planktonic foraminifera in surface sediments might be related to the low surface productivity and carbonate dissolution in this area The distribution of benthic foraminifera was mainly controlled by surface primary productivity and water depth related carbonate dissolution and water mass properties. Among them, the foraminifera of the Chukchi shelf area in the Arctic Ocean was dominated by the combination of Elphidium spp. And Nonionellarobusta , The abundance and the degree of differentiation are low and controlled by the water mass of the Arctic coast. The foraminifera in the Bering Sea slope area is dominated by the combination of Uvigerina peregrina-Globobulimina affinis, which contains more N.robusta and has relatively higher abundance and differentiation. Middle and deep water masses. However, the dissolved carbonate layer and compensation depth (CCD) in this area are relatively shallow, which are located at about 200 and 380 m, respectively. In addition, the surface sediments of the upper Bering Sea continental slope contain the Arctic continental slope The typical deep-water benthic foraminifera Stetsoniaarctica shows that there was deep water exchange in the sea area on both sides of the Bering Strait.