海南岛三亚三井珊瑚礁中稀土元素地球化学特征及其古气候意义  

GEOCHEMICAL CHARACTERISTICS OF REE IN CORAL REEF OF SANYA 3 WELL AND ITS PALEOCLIMATIC SIGNIFICANCE

作　　者：周世光[1] 业渝光[1] 刘新波[1] 

机构地区：[1]地质矿产部海洋地质研究所

出　　处：《海洋地质与第四纪地质》1997年第2期103-110,共8页Marine Geology & Quaternary Geology

基　　金：地质行业科技发展基金

摘　　要：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。REE in Holocene coral reef of Sanya 3 well of Hainan Island has been systematically studied.The results have indicated that REE has the following characteristics of distribution:(1)from 4m to 7m of well depth,ΣREE changes frequently,(2)LREE/HREE ratio increases,and (3)relatively larger Ce negative anomaly takes place.All these tell that within the range of 4 7m well depth,the formation environment of coral reef is frequently affected by climate,the actions of runoff and weathering increase and relatively strong oxidation environment occurs.And all these are the rescults of warm and humid climate.This indicates that REE in coral reef is a good indicator of climatic changes.

关 键 词：海南岛 珊瑚礁 古气候 稀土族 地球化学 

分 类 号：P588.248[天文地球—岩石学] P532[天文地球—地质学]