珠三角沿海地区土壤硒的来源和富集成因初探

Preliminary Study on the Source and Origin of Selenium-rich Soils in the Coastal Area of the Pearl River Delta

本文总结了珠三角沿海地区土壤硒含量的分布特征及其与成土母质的关系,探讨了该区域土壤中硒的来源及富集影响因素,提出珠三角地区土壤富硒是亚热带季风性气候湿热条件下花岗岩类强烈化学风化和富集改造的结果,土壤富硒作用的实质是杂质元素从成土母质中大量活化并分离移出,从而使硒元素发生相对富集的过程。本文对珠三角沿海地区土壤硒富集规律的总结显示该地区硒资源具有巨大潜力,具有广阔的开发富硒资源前景。

In this study, distribution of selenium in the soils from the Pearl River Delta and their relationship with the parent materials are reviewed. By discussing the source of selenium in soils and impact factors of selenium enrichment, we propose that the selenium-rich soils in the Pearl River Delta are the products of intense chemical weathering of granitoids under subtropical mansoon. The essence of selenium enrichment in soil is that impurity elements are activated and removed from the parent material, which results in relative enrichment of selenium. Our studies for the regularities of selenium enrichment in soils of the Pearl River Delta suggest that this area might have great prospecting potential for development of selenium-rich resources.