【摘要】 大地构造环境、物质来源和环境的氧化还原条件是控制稀土分布的三个重要因素。粤西不同时代沉积岩稀土元素分布具三段式特点,与地槽（Z（?）—S）、地台（D—P）和地洼（T₃—K）三个阶段对应。地槽沉积岩的稀土元素分布特征具陆壳成分的特点;地台、地洼沉积岩稀土特征具有一定的继承性。由震旦纪（?）至白垩纪,随环境的氧化条件变化,δCe由0.62上升为1.01。更多还原

【Abstract】 Corresponding to the three stages of geotectonie evolution: the geosyn-cline （Z（? ） --S）, the platform （D--P）, and the diwa （T₃-E）, thereare three types of rare earth element distribution in sedimentory rocks ofdifferent periods in western Guangdong.the rare earth element distributionof sedimentory rocks of the geosyncline is characterized by peculirities ofcontiriental crust materials, ∑REE 183.3 ppm, ∑LREE/∑HREE 8.3, δEu0.66 （mean value）. The rare earth element distribution of sedimentaryrocks of the platform and the diwa is of a certain inherited character.From Z（?） to K, δCe increases gradually （0.62～1.01） as environmentoxidizing condition varies.The studies of the rare earth element chemis-try show that the rare earth element distribution is depended on the tec-tonic condition, sources of material, and environment oxidizing-reductioncondition.更多还原