赵青芳, 龚建明, 李双林, 贺行良, 付少英. 南海神狐海域表层沉积物稀土元素地球化学[J]. 海洋地质与第四纪地质, 2010, 30(1): 65-70. DOI: 10.3724/SP.J.1140.2010.01065
引用本文: 赵青芳, 龚建明, 李双林, 贺行良, 付少英. 南海神狐海域表层沉积物稀土元素地球化学[J]. 海洋地质与第四纪地质, 2010, 30(1): 65-70. DOI: 10.3724/SP.J.1140.2010.01065
ZHAO Qingfang, GONG Jianming, LI Shuanglin, HE Xingliang, FU Shaoying. GEOCHEMICAL CHARACTERISTICS OF RARE EARTH ELEMENTS OF SURFACE SEDIMENTS IN SHENHU AREA OF SOUTH CHINA SEA[J]. Marine Geology & Quaternary Geology, 2010, 30(1): 65-70. DOI: 10.3724/SP.J.1140.2010.01065
Citation: ZHAO Qingfang, GONG Jianming, LI Shuanglin, HE Xingliang, FU Shaoying. GEOCHEMICAL CHARACTERISTICS OF RARE EARTH ELEMENTS OF SURFACE SEDIMENTS IN SHENHU AREA OF SOUTH CHINA SEA[J]. Marine Geology & Quaternary Geology, 2010, 30(1): 65-70. DOI: 10.3724/SP.J.1140.2010.01065

南海神狐海域表层沉积物稀土元素地球化学

GEOCHEMICAL CHARACTERISTICS OF RARE EARTH ELEMENTS OF SURFACE SEDIMENTS IN SHENHU AREA OF SOUTH CHINA SEA

  • 摘要: 南海神狐海域表层沉积物稀土元素总量变化较大,分布范围为66.8~218.3 μg/g,平均值为128.1 μg/g,相对接近于中国黄土(w (∑REE)=170.66 μg/g);∑REE受"粒度效应"控制,主要富集于黏土质粉砂中;各类沉积物及与中国黄土、上陆壳和珠江口沉积物的稀土元素标准化曲线的变化趋势基本一致,表明这些沉积物具有相同的物源区,且具有大陆地壳性质。铈的负异常主要受陆源源区气候环境变化控制,而与海水关系不大。∑REE与CaO、CaCO3和Sr元素呈负相关,与Al2O3、K2O、SiO2呈正相关,表明稀土元素与生物作用基本无关,可能主要吸附于黏土矿物表面和赋存于陆源碎屑矿物的晶格中。

     

    Abstract: The total content of rare earth element(∑REE) ranges from 66.8 to 218.3μg/g in surface sediments of Shenhu area of South China Sea. The average content of ∑REE is 128.1μg/g, relatively approaching the average content of ∑REE in China Loess; ∑REE is controlled by grain size and mainly concentrated in clayey silt. The change trend of standard curves of REE has no difference in various types of sediments, which suggests that the surface sediments of Shenhu come from the same material source and have characters of upper continental crust. Negative Ce anomaly is mainly affected by climate and environment changes in the source area, and has little to do with the sea. REE concentrations are negatively correlated with the contents of CaO,CaCO3 and Sr, but positively correlated with the contents of Al2O3,K2O and SiO2 in these sediments, which shows that REE has nothing to do with the biological role, probably existing in the crystal lattice of Alsilicate minerals and being adsorbed on clay.

     

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