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对海南岛北部玄武岩上发育的成土年代系列土壤的研究表明 ,土壤中高岭石含量随风化成土年代的增加而逐渐增高 ,至富铁土时含量已达最高 ,之后含量下降。三水铝石含量逐渐增加。赤铁矿含量和结晶程度也随风化成土年代增加而增高。磁赤铁矿也有增加的趋势
The study on the soil series dating from the basalts in northern Hainan Island showed that the content of kaolinite in the soil increased gradually with the increase of the age of weathering soil and reached the highest content in the iron-rich soil, and then decreased. Gibbsite content gradually increased. The content of hematite and the degree of crystallinity also increase with the increase of weathering age. Maghemite also has an increasing trend