| 曹园园,倪萍,石天池,杨建锋,单志伟,王超,陈晓晶.宁夏石嘴山地区土壤硒的来源及影响因素研究[J].矿产勘查,2022,13(12):1889-1897 |
| 宁夏石嘴山地区土壤硒的来源及影响因素研究 |
| Research of origin and influence factors of selenium-riched soil in Ningxia Shizuishan Area |
| 投稿时间：2021-11-13 |
| DOI：10.20008/j.kckc.202212019 |
| 中文关键词: 石嘴山地区 硒 物质来源 影响因素 宁夏 |
| 英文关键词: Shizuishan area selenium genesis and origin influence factors Ningxia |
| 基金项目:本文受宁夏地勘基金项目“石嘴山地区富硒土地质量调查评价(HZ20170040-Ⅲ)”和宁夏自然科学基金项目“宁夏石嘴山富硒区硒的来源及迁移转化研究(2020AAC03450)”联合资助。 |
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| 中文摘要: |
| 宁夏石嘴山地区作为新发现富硒土地的地区,前人对该区土壤硒的来源及影响因素研究甚少。本文以石嘴山地区富硒土壤为研究对象,通过采集岩石、表层土壤、土壤剖面样品,研究Se元素在土壤中的分布特征、成因来源及影响因素。本文认为石炭系地层是Se元素的有利赋存层位,Se元素的含量为0.847~1.728 μg/g。砂岩、页岩中较发育的石英裂隙及石英的重结晶作用为硒晶体的共生和填充提供了场所。另外,通过表层土壤Se和垂向剖面土壤Se的含量分布特征,较全面地分析了土壤Se的影响因素,结果显示,表层土壤中Se元素的含量与Cd、Cr、Zn、Pb、TFe2O3、N和有机质呈明显的正相关,与pH呈负相关。土壤Se在垂向上主要受淋滤作用的影响,而生物积累作用的影响不大。本次研究成果对富硒土地资源的开发与利用具有一定的指导意义。 |
| 英文摘要: |
| Shizuishan area of Ningxia is a newly discovered are of Se-enriched land, but there few studies on the genesis and origin of soil selenium, and influencing factors of soil selenium in this area. Taking Se-enriched soil in Shizuishan area as the research object, the distribution, origin and influencing factors of Se element in soil were studied by collecting rock samples, surface soil samples and soil profile samples. It is considered that the Carboniferous strata are favorable for the occurrence of Se, and the average Se content is 0.847~1.728 μg/g. The well-developed quartz fissures and quartz recrystallization in the shale and sandstone rock series provide a place for the symbiosis and filling of selenium crystals. In addition, through the distribution characteristics of Se content in surface soil and vertical soil profile, the influence factors of Se in soil were comprehensively analyzed. The results showed that the content of Se in surface soil was positively correlated with Cd, Cr, Zn, Pb, Fe2O3, N and organic matter, and negatively correlated with pH. The accumulation of Se in vertical profile was mainly influenced by leaching, but not by bioaccumulation. The results of this study have important guiding significance for the development and utilization of selenium-rich land resources. |
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