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东海30个表层沉积样和6个站位18个浮游样分析的结果表明,沉积物中颗石类丰度随着离岸水深加大而增高,冲绳海槽的丰度比内陆架高数千倍,但在残留砂分布区则明显降低。东海共见颗石类28种,以EmiIiania huxleyi和Ggphyrocapsa oceanica两种占压倒优势。冲绳海槽的颗石类组合与太平洋的相近,而不同于低分异度的陆架组合。陆架水柱中仅在中层浮游样中发现较高含量的颗石类,而且保存不佳,颗石球罕见,推测系从海底再悬浮而来。
The results of 30 surface sediment samples in the East China Sea and 18 planktonic samples at 6 stations show that the abundance of petrologic rocks in sediments increases with the increase of offshore water depth and the abundance of the Okinawa Trough is higher than that of the inland A thousand times, but the residual sand distribution area is significantly reduced. There are 28 species of pebbles in the East China Sea, dominated by EmiIiaia huxleyi and Ggphyrocapsa oceanica. The Okinawa Trough is similar to the Pacific Ocean in rock and stone assemblages, unlike the low-index shelf assemblages. In the shelf water column, only higher levels of petrology were found in the mid-level planktonic samples and were poorly preserved. The pebble spheres were rare, suggesting that they resuspended from the seabed.