关于海洋铁锰结核成因的现代概念,在成矿机制方面存在着许多矛盾之处。虽然海水中锰氧化物稳定性的热力学计算表明,相对于MnO_2的平衡浓度,深层海水中的Mn~(2+)过饱和时,就可以析出固相的二氧化锰,但是海水中Mn~(2+)的浓度极低,为0.001—0.002毫克/升,这就对堆积大量富锰沉积物的可能性产生 The modern concept of the origin of marine iron-manganese nodules has many contradictions in the mechanism of mineralization. Although the thermodynamic calculation of the manganese oxide stability in seawater shows that the solid phase manganese dioxide can be precipitated when Mn 2+ in deep seawater is supersaturated with respect to the equilibrium concentration of MnO 2, 2+) is very low at 0.001-0.002 mg / L, which gives rise to the possibility of accumulating large amounts of manganese-rich sediments