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由南海南部海区NS93 - 5柱样的浮游有孔虫氧同位素地层学和浮游有孔虫分析结果获得的古环境参数 ,揭示了距今 1 90ka以来南部海区受西太平洋热带水的影响 ,以及南沙海区表层水和苏禄海变性水的变化历史 ;在末次盛冰期碳酸盐含量较低 ,但是碳酸盐含量的最低值出现在氧同位素 4期 ;表层水体的含氧量呈现为间冰期大于冰期 ,而古生产力的变化则为冰期大于间冰期 ;依据氧同位素和浮游有孔虫特征分析结果 ,建立了南部海区距今 1 90ka以来的古气候演变序列。
The paleoenvironmental parameters derived from the planktonic foraminiferal oxygen isotope stratigraphy and planktonic foraminifera from NS93 - 5 samples in the southern South China Sea reveal that the southern sea area is affected by the tropical water in the western Pacific since 1 90 ka, The surface water in the sea area and the degenerated water in the Sulu Sea. In the last ice age, the carbonate content was lower, but the lowest carbonate content appeared in the fourth stage of oxygen isotope. The oxygen content in the surface water body appeared to be greater than The paleoclimatic evolution of the South China Sea was from glaciation to paleoclimate. The evolution of paleoclimate was greater than the interglacial during the glacial period. Based on the analysis of the characteristics of oxygen isotopes and planktonic foraminifera, the paleoclimate evolution sequence of the southern sea area since the present 1 90 ka was established.