Enrichment of REEs in polymetallic nodules and crusts and its potential for exploitation  

作　　者：张振国 杜远生 高莲凤 张盈 史国媛 刘长水 张鹏 段杏宽 

机构地区：[1]Faculty of Earth Science,China University of Geosciences [2]College of Mining Engineering,Hebei United University [3]Key Laboratory Mineral Development and Security Technology of Hebei Province

出　　处：《Journal of Rare Earths》2012年第6期621-626,共6页稀土学报（英文版）

基　　金：National Natural Science Foundation of China(40972079,41172015 and 41030853);the State Key Research Develop-ment Program of China(2007CB411703);the Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology,Ministry of Landand Resources(MRE200912);the Fund of Education Department of Hebei Province(2009443,2010148)

摘　　要：Polymetallic nodules and crusts are two of the most important mineral deposits in the ocean. They are rich in rare earth elements （REEs）, iron, manganese, copper, cobalt, nickel, and other useful metals. This paper discussed the analysis of 25 nodule and crust samples collected from the South China Sea, the Pacific, Atlantic, and Indian Oceans. The samples were analyzed for REE content by ICP-MS/AES. The average REE concentration was found to be 1096.96×10^-6 in the nodules and 1623.88×10^-6 in the crusts. Both of these values are much higher than those recorded in Earth＇s dry-land crust and sedimentary rocks. This REE enrichment is mainly controlled by the absorption of ferromanganese oxides and clay minerals in the nodules and crusts and the high levels of REEs in seawater and sediments. High cerium enrichment in the nodules and crusts may lead to more effective exploitation of REEs in the future.Polymetallic nodules and crusts are two of the most important mineral deposits in the ocean. They are rich in rare earth elements （REEs）, iron, manganese, copper, cobalt, nickel, and other useful metals. This paper discussed the analysis of 25 nodule and crust samples collected from the South China Sea, the Pacific, Atlantic, and Indian Oceans. The samples were analyzed for REE content by ICP-MS/AES. The average REE concentration was found to be 1096.96×10^-6 in the nodules and 1623.88×10^-6 in the crusts. Both of these values are much higher than those recorded in Earth＇s dry-land crust and sedimentary rocks. This REE enrichment is mainly controlled by the absorption of ferromanganese oxides and clay minerals in the nodules and crusts and the high levels of REEs in seawater and sediments. High cerium enrichment in the nodules and crusts may lead to more effective exploitation of REEs in the future.

关 键 词：polymetallic nodules  crusts  REEs  enrichment characteristics  potential for exploitation rare earths 

分 类 号：P744[天文地球—海洋科学]