| 湛江湾海域表层沉积物稀土元素特征及其物源指示意义 |
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| 引用本文： | 远继东,姜正龙,代友旭,郝连成,张健康,张德程,郑立龙.湛江湾海域表层沉积物稀土元素特征及其物源指示意义[J].现代地质,2022,36(1):77-87. |
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| 作者姓名： | 远继东 姜正龙 代友旭 郝连成 张健康 张德程 郑立龙 |
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| 作者单位： | 1. 中国地质调查局烟台海岸带地质调查中心,山东 烟台 2640042. 中国地质大学(北京) 海洋学院,北京 1000833. 中国地质大学(北京) 地球科学与资源学院, 北京 100083 |
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| 基金项目： | 中国地质调查局项目“雷州半岛东部海岸带综合地质调查”(DD20208011)； |
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| 摘 要： | 通过对湛江湾近海海域表层沉积物样品粒度和稀土元素(RE E)测试分析,系统地研究海域沉积物稀土元素地球化学特征并探讨其物质来源.结果表明,研究区沉积物的稀土元素含量变化较大,平均值为163.23μg/g,湾外的REE含量(168.61μg/g)高于湾内的REE含量(142.17μg/g);不同类型沉积物的稀土元素含量存...
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| 关 键 词： | 表层沉积物 稀土元素 物源 湛江湾海域 |
| 收稿时间： | 2021-05-28 |
| 修稿时间： | 2021-11-09 |
REE Characteristics in Surface Sediments of Zhanjiang Bay and their Provenance Indicating Significance |
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| YUAN Jidong,JIANG Zhenglong,DAI Youxu,HAO Liancheng,ZHANG Jiankang,ZHANG Decheng,ZHENG Lilong.REE Characteristics in Surface Sediments of Zhanjiang Bay and their Provenance Indicating Significance[J].Geoscience——Journal of Graduate School,China University of Geosciences,2022,36(1):77-87. |
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| Authors: | YUAN Jidong JIANG Zhenglong DAI Youxu HAO Liancheng ZHANG Jiankang ZHANG Decheng ZHENG Lilong |
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| Institution: | 1. Yantai Center of Coastal Zone Geological Survey, China Geological Survey, Yantai, Shandong 264004, China2. School of Ocean Sciences, China University of Geosciences, Beijing 100083, China3. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China |
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| Abstract: | Sediment geochemical characteristics and provenance in offshore Zhanjiang Bay were systematically studied by analyzing the grain size and rare earth elements (REEs) of surface sediment samples. The results show that the REE contents of sediments vary greatly (average 163.23 μg/g). The REE contents of outside the bay (168.61 μg/g) is higher than those in the bay (142.17 μg/g). The REE contents in different sediment types vary, which increase with the decrease of grain size. (La/Yb)N ranges from 4.80 to 11.76 (average 8.01); Europium anomaly (δEu) value ranges from 0.22 to 0.61 (average 0.45); Cerium anomaly (δCe) value ranges from 0.98 to 1.07 (average 1.03). The samples are characterized by typical light rare earth element (LREE) enrichment, homogeneity of heavy rare earth element (HREE) and distinct negative Eu anomaly, indicating that these sediments are terrigenous. Chondrite-normalized REE curves and REE parameters show that the sediments in Zhanjiang Bay are approximately homologous with those from around Jianjiang, Moyangjiang and Pearl Rivers, and are mainly sourced from granitoids in South China, basalts in northern Leizhou Peninsula, and unconsolidated sediments of the Zhanjiang and Beihai Formations. |
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| Keywords: | surface sediment rare earth element provenance Zhanjiang Bay |
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