首页|珠江三角洲平原区第四纪沉积物地球化学特征及其控制因素

珠江三角洲平原区第四纪沉积物地球化学特征及其控制因素

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在珠江三角洲经济区多目标区域地球化学调查基础上，根据珠江三角洲第四纪地质、基底地形、水系走向等方面的资料，在珠江三角洲布署了6条钻孔剖面，共44个第四纪地质钻探，对其晚更新世以来沉积物的地球化学特征进行了系统分析。结果表明：珠江三角洲平原区重金属元素富集，特别是以Cd、Hg、Cu、Pb、Zn、Ni、As为代表的重金属元素较为富集，形成高背景区。不同区域富集元素类型及富集程度呈现较大差异，其中以西北江三角洲各元素最为富集，而潭江三角洲仅U、Al2O3富集，其Cl、Cd、Cu、Sb、CaO等元素含量明显低于全区平均含量，东江三角洲Mo、S、Th、Tl、U等元素富集，Cd、Cl、Co、Cr、Hg、Mn、Ni、Sb、Sr、Ti、V、MgO、CaO、Na2O等元素含量明显低于全区平均含量。元素空间分布差异的控制因素是三角洲平原物质来源差异及沉积体系变迁。
Element geochemical characteristics and controlling factors of the Qua-ternary Sediments in the Pearl River Delta plain
Based on multi-purpose regional geochemical survey in Pearl River Delta Economic Zone, quaternary sediments of 44 cores were emplaced in the Pearl River delta plain. Totally 39 elements and indicators for soils and sediments were determined. According to the characteristics of this area, we firstly carried out the study of geochemical characteristic of delta formation evolution. The results indicate that the average concentrations of most elements in sediment were significantly enriched, the heavy metal elements Cd、Hg、Cu、Pb、Zn、Ni、As have accumulated remarkably, especially. Element type and enrichment degree are distinguishing in different area of the Pearl River delta pain. The main enrichment areas are West River and North River alluvial, Tan River and East River alluvial are the background area;the main factors that control the element contents of sediments in this area are the source material and the change of sedimentary environment.

the Pearl River deltaquaternary sedimentelement of geochemistryDistribution characteristicsmaterial sourcessedimentary environment

李文胜、窦磊、刘子宁

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广东省地质调查院，广州510080

珠江三角洲 第四纪沉积物 元素地球化学 分布特征 物源 沉积环境

中国地质调查广东省环境保护专项

1212010511216粤环[2014]126

2016

10.3969/j.issn.1007-3701.2016.01.009

华南地质
武汉地质矿产研究所

华南地质

影响因子：0.516
ISSN：1007-3701
年,卷(期)：2016.32(1)
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