中文摘要：

文章采用火试金分离富集法和等离子发射光谱（ICP-MS）测定了东太平洋CC区多金属结核中PGE和Au元素的含量，结果显示：结核中PGE相对于洋壳明显富集，尤其是Pt含量较高，wPt平均值为100．90×10^-9。各种类型的多金属结核PGE和Au的球粒陨石配分曲线及有关参数非常一致，均表现为Pt正异常和Pd负异常，显示其中PGE和Au具有相似的来源。多金属结核与海底海山富钴结壳PGE配分模式及特征元素比值对比表明，两者PGE可能具有相同的来源，可能主要来源于海底玄武岩的水岩反应，部分来源于铁陨石，而并非主要来自海底热液及正常海水。

英文摘要：

The platinum-group elements and Au concentrations of polymetallic nodules from the CC zone of East Pacific Ocean were determined by a combined NiS fire assay and ICP-MS method, in which PGE were preconcentrated and then measured by ICP-MS. The nodules are enriched with more PGEs than the oceanic crust. Pt, in particular, reaches a high concentration with an average of 100.90 ×10^-9 in nodules. Different types of nodules have quite similar PGE and Au chondrite-normalized patterns and related parameters, with positive Pt and negative Pd anomalies, indicating that PGE and Au in different types of nodules have the same sources. Besides, the similar PGE chondrite-normalized patterns and element ratios between seamounts cobaltrich crusts and nodules suggest that they may also have similar sources of PGE, perhaps derived mainly from seawater-rock interaction in submarine basalt and partially from iron meteorite, but not directly from submarine hydrothermal sulfides and seawater.