山东省定陶地区富锶土壤地质成因研究

Study on Geological Origin of Strontium Rich Soil in Dingtao Area in Shandong Province

摘要:

为研究山东省定陶地区土壤富锶的地质成因，更好地规划潜在富锶土壤种植区域，指导农业生产，发展绿色经济，本文在对该区土壤样品的相关元素化验分析的基础上，进行了定陶地区富锶土壤的沉积环境分析、黄河故道变迁分析和水化学分析。通过研究分析发现，土壤中富集的锶非当地风化沉积而成，而是从锶含量较高的区域搬运而来。历史上黄河故道曾流经研究区，并且该区全部位于黄泛区内，黄河源头及流经区域多处富含锶矿及锶含量高的岩石，研究区土壤元素Sr/Cu值显示古沉积环境为湿润的，说明由富锶区域水流搬运而来。黄河故道流经研究区，其源头为产出天青石矿的大省，研究区地下水中为HCO3Na型，地下水中Sr与SO24为极显著相关，相关系数为0.719，远大于与HCO3的相关系数，符合天青石矿与水作用规律。进一步验证了研究区富锶土壤为黄河故道沉积而来，推测研究区锶为黄河故道沉积得来，沉积速度为0.5～1.6cm/a。

Abstract:

In order to study the geological causes of soil strontium rich in Dingtao area of Shandong Province, better plan the potential planting area of strontium rich soil, guide agricultural production and develop green economy, based on the analysis of relevant elements of soil samples in this area, the sedimentary environment analysis of Strontium rich soil in Dingtao area, the change analysis of the Old Yellow River channel and the hydrochemical analysis were carried out. t is found that the enrichment of Strontium in soil is not formed by local weathering, but transported from areas with high strontium content. In history, the old course of the Yellow River once flowed through the study area, and the area was all located in the Yellow River flood area. There are many strontium rich ores and rocks with high strontium content in the source and flow area of the Yellow River. The Sr/Cu value of soil elements in the study area shows that the paleosedimentary environment was humid, indicating that it was transported by the water in the strontium rich area. The old channel of the Yellow River flows through the study area, and its source is the province producing celestite. The groundwater in the study area is HCO3Na type. The correlation coefficient between Sr and SO24in groundwater is very significant, with the correlation coefficient of 0.719, which is far greater than the correlation coefficient with HCO3, which conforms to the law of celestite and water interaction. It is further verified that the strontium rich soil in the study area is deposited from the old channel of the Yellow River. It is also speculated that strontium in the study area was deposited in the old channel of the Yellow River with a deposition velocity of 0.5~1.6cm/a.