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本文对海南岛三亚三井全新世形成的珊瑚礁中稀土元素进行了系统分析研究。结果表明，稀土元素具有明显分布特征：１．在井深４—７ｍ范围内，ΣＲＥＥ变化频繁；２．ＬＲＥＥ／ＨＲＥＥ的比值增大；３．Ｃｅ出现相对大的负异常。这些特征表明，在井深４—７ｍ范围内，珊瑚礁成岩环境频繁受到古气候变化的影响，径流和风化作用增强，并且出现了相对强的氧化环境。而径流和风化作用的增强及相对强的氧化环境的形成，通常由暧湿的古气候所致。说明珊瑚礁中稀土元素对古气候变化有良好的指示作用
In this paper, the rare earth elements in the coral reefs formed by the Holocene in the Triassic of Sanya, Hainan Island were systematically analyzed. The results show that rare earth elements have obvious distribution characteristics: 1. In the depth of 4-7m, ΣREE changes frequently; LREE / HREE ratio increases; 3. Ce shows a relatively large negative anomaly. These characteristics indicate that the coral reef diagenetic environments are frequently affected by paleoclimate changes, runoff and weathering enhancements, and relatively strong oxidative environments occur within a depth of 4-7m. However, the enhancement of runoff and weathering and the formation of a relatively strong oxidizing environment are usually caused by the warm and humid paleoclimate. Reefs indicate that rare earth elements have a good indicator of paleoclimatic change