| 东太平洋CC区多金属结核铂族元素（PGE）地球化学及其意义 |
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| 引用本文：何高文，孙晓明，杨胜雄，薛 婷，宋成兵，石贵勇，张 美，韩喜球.2006.Platinum group elements (PGE) geochemistry of polymetallic nodules in CC zone, east Pacific Ocean [J].Mineral Deposits,25(2):164~174 |
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| 基金项目:中国大洋协会国际海底区域研究开发“十五"计划项目（DY105_01_02_1和DY105_2 _01_13）、国家自然科学基金（40343019和40473024）、中科院广州地球化学研究所南海海 洋研究所边缘海地质重点实验室开放基金（MSGLCAS03_4）、高等学校博士点基金（2004055 8049）和国土资源部百名优秀青年科技人才计划 |
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| 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。 |
| 中文关键词:地球化学 多金属结核 铂族元素（PGE）和Au 富钴结壳 成矿物质 来源 东太平洋CC区 |
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| Platinum group elements (PGE) geochemistry of polymetallic nodules in CC zone, east Pacific Ocean |
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| Abstract:The platinum_group elements and Au concentrations of polymetallic nodules from t he CC zone of East Pacific Ocean were determined by a combined NiS fire ass a y 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 particula r, reaches a high concentration with an average of 100.90×10－9 in nodule s. Different types of nodules have quite similar PGE and Au chondrite_normalized patterns and related parameters, with positive Pt and negative Pd anomalies, in dicating that PGE and Au in different types of nodules have the same sources. Be sides, the similar PGE chondrite_normalized patterns and element ratios between seamounts cobalt_rich crusts and nodules suggest that they may also have similar sources of PGE, perhaps derived mainly from seawater_rock interaction in submar ine basalt and partially from iron meteorite, but not directly from submarine hy drothermal sulfides and seawater. |
| keywords:geochemistry, polymetallic nodules, PGE and Au, cobalt_rich c rust, source of ore_forming materials, CC zone of East Pacific Ocean |
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