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本文探讨了海南岛玄武岩上发育的热带地球化学景观中土壤重金属与机械组成,矿物成分和矿物组合之间的关系。结果表明,砖红壤粘粒并不富集重金属元素,这与砖红壤各粒级矿物分布特征有关,在其粉粒级和砂粒级中有大量氧化铁矿物,面粘粒级中主要是高岭石和三水铝矿。此外,水稻土随粒径变大,重金属含量减少,这同水稻土随粒径增大,粘土矿物迅速减少,长石、石英增多有关。这和一般土壤重金属在不同粒级中分布规律相符合。
This paper discusses the relationship between heavy metals and mechanical composition, mineral composition and mineral assemblages of soils in tropical geochemical landscapes developed on basalts in Hainan Island. The results show that the clay granules in the red soil are not enriched in heavy metal elements, which is related to the distribution characteristics of various grain-sized minerals in the latosol. There are a lot of iron oxide minerals in the grain size and sand grade, Ridge and gibbsite. In addition, with the increase of grain size, the content of heavy metals in paddy soil decreased, which was associated with the increase of grain size, the rapid decrease of clay minerals and the increase of feldspar and quartz in paddy soil. This is consistent with the distribution of heavy metals in different soil fractions.