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利用ICP-AES法和重铬酸钾氧化还原容量法测定珠江口沉积物中的微量元素和总有机质含量,结合沉积物粒度参数,采用因子分析方法识别控制沉积物化学组成和元素行为的3个因子:流域侵蚀因子、表生沉积作用控制因子和海洋环境控制因子.研究发现,3个控制因子的得分曲线基本反映了该地区气候干湿、冷暖的强弱变化,可作为恢复古气候环境的代用曲线;在本岩心所代表的沉积年代中共有5次较为明显的环境变化,为深入研究珠江三角洲区域古环境、古气候演化提供了重要的参考依据.
The contents of trace elements and total organic matter in the sediments from the Pearl River Estuary were measured by ICP-AES and potassium dichromate redox capacity method. The sediment particle size parameters were used to identify the chemical composition and elemental behavior of sediment controlled by three factors Factors: watershed erosion factor, superficial sediment control factor and marine environmental control factor.The study found that the score curves of three control factors basically reflect the change of climate wet-dry and warm-cold in the region, which can be used as the restoration of paleoclimate environment Substitution curves. There are five obvious environmental changes in the depositional age represented by this core, which provides an important reference for further studying the paleoenvironment and paleoclimate evolution in the Pearl River Delta.