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南极半岛西北海域表层沉积特中,微植物有机质颗粒包括五种类型:现代孢粉、再沉积孢粉、具结构有机质残骸、无结构有机质颗粒以及海藻类。按成因可分为陆生物质和海生物质两大类。本文分析陆生微植物有机质、特别是再沉积孢粉和无结构有机颗粒的组分、丰度、时代及分布格局,指出区内表层沉积物可能属于近源补给成因,半岛陆架、南设德兰群岛岛架和岬湾等的水动力条件强于海峡中央,并探讨了物源与海流的关系。
There are five types of micro-plant organic matter particles in the special sediments of the Antarctic Peninsula in the northwest sea area: modern sporopollen, re-deposited sporopollen, structural organic matter debris, unstructured organic matter particles and seaweeds. By reason can be divided into two major categories of marine and marine biomass. In this paper, the composition, abundance, age and distribution patterns of terrestrial microecosystems, especially re-deposited sporel and unstructured organic particles, are analyzed. It is concluded that the surface sediments in the terrestrial area may belong to the proximate source recharge, continental shelf and south Shetland The hydrodynamic conditions such as island shelf and promontory are stronger than those in the central strait, and the relationship between source and current is discussed.