The changes of types and relative contents of iron oxides in iron-manganese nodules were similar to corresponding soils, however, the ratios of G/(G+H) in nodules were higher than those in soils.

• 相应土壤铁锰结核中氧化铁类型及相对含量的变化与土壤中的变化具有一致性。但铁锰结核中的G/（G+H）比值一般较相应土壤中的G/（G+H）比值略高。