| 龚晓波,廖阮颖子,孟標,郭道军.长寿地区Se元素地球化学特征[J].地质找矿论丛,2015,30(1):133-137 |
| 长寿地区Se元素地球化学特征 |
| Geochemical characteristics of selenium in Changshou district,Chongqing |
| 投稿时间：2013-09-09 |
| DOI：10.6053/j.issn.1001-1412.2015.01.019 |
| 中文关键词: 长寿地区 土壤 Se元素 地球化学特征 重庆市 |
| 英文关键词:Changshou District soil selenium geochemistry Chongqing city |
| 基金项目: |
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| 中文摘要: |
| 文章阐述了重庆市长寿区渡舟镇—江南镇一带表层土壤中Se元素的含量水平、空间分布以及Se元素与Pb,Zn,Hg等8个重金属元素、pH值之间的关系。研究区表层土壤中Se元素经迭代剔除后背景均值为0.14×10-6,处于低含量水平;Se含量在城镇区域明显高于农田区域,局部富Se水平;土壤中Se元素分布主要受地层、岩性及土壤对Se元素富集特性的控制,在侏罗系中下统自流井组—新田沟组中,Se元素含量随地层年代由老到新逐渐减少;在侏罗系中上统沙溪庙组—蓬莱镇组中,随地层时代由老到新呈逐渐增加的趋势;随着Se元素含量的升高,As,Cd,Cr,Cu,Pb,Zn元素含量逐渐升高,呈显著正相关关系(P<0.01),Hg,Ni元素含量略具升高趋势,而pH值则无明显升降,相关性不明显。 |
| 英文摘要: |
| The paper presents content level of selenium in surface soil and the spatial distribution in soil, and its relation to eight heavy metal elements, such as Selenium, Pb, Zn, Hg etc. and pH value. Iterative method procession of the Se data shows that its average background value is 0.14×10-6, a low selenium level. Selenium content of the town area is significantly higher than in the farmland area and locally reaches the Se-enriched level. Distribution of Selenium in soil is mainly affected by strata, lithology and local characteristics of the soil. In the Middle-Lower Jurassic Series Ziliujing Formation and Xintiangou Formation, selenium content is reducing gradually from the older to the younger but in middle -upper Jurassic Shaximiao Formation to Penglaizhen Formation is opposite, increases from the older to the younger. With the increase of Selenium, the content of As, Cd, Cr, Cu, Pb and Zn increase gradually showing positive correlation (P<0.01), and content of Hg、Ni increase slightly. Increase or decrease of Se is not obviously correlated to pH value. |
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