中国地质2011，Vol.38Issue(2)：462-472,11.
太平洋多金属结核和富钴结壳稀土元素地球化学对比及其地质意义
A comparison of REE geochemistry between polymetallic nodules and cobaltrich crusts in the Pacific Ocean
摘要
Abstract
Polymetallic nodules and cobalt-rich crusts are two types of ferro-manganese deposits in the ocean.In order to probe into their REE geochemical characteristics in different oceanic areas of the Pacific Ocean, the authors collected samples from eastern Pacific basin, central Pacific Ocean and western Pacific Ocean and examined REE characteristics by means of ICP-AES.There are obvious positive Ce anomalies, rich LREE (light REE) and high total REE (∑REE) in the crusts.In contrast, there are rich HREE (heave REE) and relatively low ∑REE in the nodules.Ce anomalies have different styles, such as positive, negative and indistinct anomalies caused by different genetic types of nodules.The "M" type tetrad effects of nodules indicate that the nodules have suffered diagenesis, while the crusts have not been subjected to this effect.There exist different modes of occurrence of REE in nodules and crusts in different oceanic areas.REE in the crusts from central Pacific Ocean and in the nodules from eastern Pacific Ocean probably exist in the Fe-mineral phase, whereas REE in the crusts from western Pacific Ocean might exist in the Mn-mineral phase.REE in the nodules and crusts might have been mainly derived from seawater and seamount altered basalt respectively, with limited hydrothermal contribution.关键词
多金属结核/富钴结壳/稀土元素/对比/太平洋Key words
polymetallic nodules / cobalt-rich crusts / rare earth elements (REE) / comparison / Pacific Ocean分类
天文与地球科学引用本文复制引用
何高文,孙晓明,杨胜雄,朱克超,宋成兵..太平洋多金属结核和富钴结壳稀土元素地球化学对比及其地质意义[J].中国地质,2011,38(2):462-472,11.基金项目
中国大洋协会国际海底区域研究开发课题(DY105-01-02-1、DYXM-115-01-1-02)资助. （DY105-01-02-1、DYXM-115-01-1-02）
