海桑属花粉在南海晚第四纪地层中的分布及其意义

DISTRIBUTION OF SONNERATIA POLLEN IN THE LATE QUATERNARY STRATA OF THE SOUTH CHINA SEA AND ITS SIGNIFICANCE

海桑属(Sonneratia)植物是热带滨海特有的盐滩植物,是气候和环境的指示植物,其花粉可作为滨海相沉积的重要标志。此属花粉在南海南部晚第四纪地层中分布较广,在南海中部的深海盆地,由于海流的影响,也有少量的断续分布,而处于南海北部的香港地区,在晚更新世中晚期的地层中,曾大量出现过。分析海桑属花粉在晚第四纪地层中的分布,对深入研究南海海区的物质来源、古环境和古气候等有着重要的意义。

The Sonneratia plant is dicotyledon belonging to Sonneratiaceae.The mangrove which mainly consists of Sonneratia is a special plant community of the tropical coast, which exists in identical and distinctive ecological environment, therefore, Sonneratia can be taken for an indicator-plant of climate and environment, and Sonneratia pollen can be regarded as an important sign for strata of shore and shallow sea facies. Based on the data of 9 cores, the paper found that a lot of Sonneratia pollen are widely distributed in the late Quaternary strata from the southern sea area of the South China Sea and the middle and late Pleistocene strata from the Hong Kong region in the northern coast of the South China Sea, and a few Sonneratia pollen are disjointedly distributed in the strata from deep-sea basin in the central sea area of the South China Sea. The environmental and climatic fluctuation of the late Quaternary in the South China Sea was explored by analysing the distribution of Sonneratia pollen.