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本文根据钻孔岩心的岩性、岩相组合及“~(14)C年代资料,讨论了防城湾湾顶、湾口和湾外不同部位冰后期沉积层序的类型、分布、沉积过程和沉积速率,冰后期海进过程中,该区自湾外至湾顶开始接受沉积的时间分别为距今8000年和6000年,因防城河的影响,海湾沉积速率在湾顶高于湾外,据大量钻孔的沉积层平均厚度及平均沉积速率推算,防城湾冰后期的充填速度是缓慢的。
Based on the lithology, lithofacies assemblage and data of ~ (14) C in the borehole core, this paper discusses the types, distribution, depositional processes and sediments of the late glacial ores in different parts of the bay, During the later stage of sea-level transgression, the deposition time in the area from the bay to the top of the bay was 8000 and 6000 years ago respectively. Due to the influence of the anti-ghetto, the gulf sedimentation rate was higher at the top of the bay than at the bay. According to a large number of borehole sediment average thickness and average sedimentation rate calculation, Fangchengwan ice late filling speed is slow.