Geochemical studies (WD-XRF, ICP-MS, and GF-AAS) have shown that polymetallic nodules from the eastern Clarion-Clipperton Zone (CCZ) in the Pacific Ocean are enriched in several metals such as Cu (mean 1.16%), Ni (1.15%), Co (0.15%), and Zn (0.14%), as well as remarkable contents of Mo (0.059%), V (0.04%), Ce (0.019%), Nd (0.011%), Li (0.015), and Pt (43 ppb). The average content of REE, together with Y and Sc, is 620 ppm. In nodules from the CCZ metal concentrations are often much higher than those reported in nodules from other ocean basins in the world. The bulk-nodule mean value of the Mn/Fe ratio is 5.3, which is characteristic for a mixed (hydrogenetic and diagenetic) origin of the nodules. Microprobe investigation revealed two different chemical compositions of the layers, and ascertained their general metal content. The nodules analyzed are composed mainly of concentric-collomorphic laminae of Mn and Fe (oxy)hydroxides which crystallized around mineral nuclei (e.g., quartz, clay minerals), bioclasts or rock fragments. They are from 3.3 to 7.6 cm in diameter. The chemical and physical properties of the laminae allowed distinction of two genetic types: hydrogenetic and diagenetic. Those formed as a result of hydrogenesis had increased values of Co, Si, Cl and S, while formed diagenetically showed increased levels of Cu, Ni, Mg, Zn and K. These lamina types are characterized by different growth structures, reflectivity, density and Mn/Fe ratios. The ratio of the diagenetic layers to hydrogenetic layers (192/53) in representative polymetallic nodules shows that the nodules of this study are of mixed hydrogenetic-diagenetic type. A mixed genesis was also shown by discriminant diagrams, with these CCZ samples being located at the transition between typical hydrogenetic and diagenetic fields.

地球化学研究（WD-XRF、ICP-MS 和 GF-AAS）表明，来自太平洋东部克拉里昂-克利珀顿区 (CCZ) 的多金属结核富含多种金属，例如铜（平均 1.16%）、镍(1.15%)、Co (0.15%) 和 Zn (0.14%)，以及显着的 Mo (0.059%)、V (0.04%)、Ce (0.019%)、Nd (0.011%)、Li ( 0.015) 和 Pt (43 ppb)。REE 与 Y 和 Sc 的平均含量为 620 ppm。CCZ 结核中的金属浓度通常比世界上其他海洋盆地的结核中报告的要高得多。Mn/Fe 比率的块状结核平均值为 5.3，这是结核混合（水成岩和成岩）起源的特征。微探针调查揭示了这些层的两种不同化学成分，并确定了它们的一般金属含量。所分析的结核主要由在矿物核（例如石英、粘土矿物）、生物碎屑或岩石碎片周围结晶的 Mn 和 Fe（氧）氢氧化物的同心同晶层组成。它们的直径为 3.3 至 7.6 厘米。叶片的化学和物理特性允许区分两种遗传类型：氢化和成岩。水成作用形成的层中 Co、Si、Cl 和 S 的含量增加，而成岩作用形成的 Cu、Ni、Mg、Zn 和 K 的含量增加。这些纹层类型的特征在于不同的生长结构、反射率、密度和锰/铁比率。代表性多金属结核中成岩层与加氢层的比例（192/53）表明，本研究的结核属于加氢-成岩混合型。