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南海是东亚古季风产物的主要沉积盆地，保存着比陆地更加完整和连续的沉积记录。详细分析了ODP 1143号钻井晚中新世的放射虫化石群，主要根据标志种 Diartus petterssoni，D.hughesi和Stichocorys delmontensis等的分布特征，分别建立了南海南部晚中新世的 RN6，RN7和RN8等3个放射虫化石带，并讨论了其地层年龄。探讨了以地层中放射虫的丰度变化特征等在南海南部作为东亚古夏季风活动替代性指标的可能性，初步说明东亚古夏季风可能早于8．7Ma B．P．出现，约在 8．24Ma B．P．强化达到高峰，认为与印度季风的出现几乎同步或略早。
The South China Sea is the main sedimentary basin of the ancient monsoonal products in East Asia, preserving a more complete and continuous sedimentary record than the land. Detailed analysis of late Miocene larvae of ODP No. 1143 drilling, mainly based on the distribution characteristics of the species Diartus petterssoni, D. hughesi and Stichocorys delmontensis, established the late Miocene RN6, RN7 and RN8 in southern South China Sea And other three radiolarian fossils, and discussed the stratigraphic age. This paper discusses the possibility of using the abundance characteristics of radiolarian fauna in the strata as a proxy for the East Asian summer monsoon activity in the southern South China Sea, which shows that the East Asian paleo-summer monsoon may be earlier than 8.7Ma B. P. Appeared, about 8.24Ma B. P. Intensification peaked and is believed to be almost in sync or slightly earlier with the onset of the Indian monsoon.