中太平洋富钴锰结壳水羟锰矿研究  

Study on Vernadite in Co-Rich Crust from the Central Pacific Ocean

作　　者：胡大千[1,2] 初凤友[2,3] 姚杰[1] 

机构地区：[1]吉林大学地球科学学院,长春130061 [2]国家海洋局海底科学重点实验室,杭州310012 [3]国家海洋局第二海洋研究所,杭州310012

出　　处：《吉林大学学报（地球科学版）》2009年第4期706-710,748,共6页Journal of Jilin University：Earth Science Edition

基　　金：国家大洋专项重点研究课题(DY105-01-01-08)

摘　　要：采用场发射电镜（JSM-6700F）和透射电镜（JEM-2000FX）研究究了富钴结壳中水羟锰矿的形态和结构。结果表明：水羟锰矿单体片径一般为30-50nm，集合体成片状或鳞片状；获得了水羟锰矿d=0．1429nm的单晶和三连晶电子衍射结构；水羟锰矿中Fe^3＋、Co^3＋、Ni^3＋为高自旋态离子，Co^3＋、Ni^3＋、Cu^3＋易与Mn‘’形成类质同像置换，部分Fe^3＋与Mn^4＋可能存在有限的类质同像置换，置换反应为3Mn^4＋=4Co^3＋（Ni^3＋、Cu^3＋、Fe^3＋），体系总电价平衡。The authors report the results of study on the crystal habit and texture of vernadite in a co-rich crust from the Central Pacific Ocean using the JEM - 6700F and JSM - 2000FX. The results show that vernadites generally occur as a schistose singgle crystal, and schistose or scaly aggregates, and that the single schistose is 30- 50 nm in size. The single and trilling crystals electron diffraction patterns of vernadites, i.e. , d=0. 142 9 nm, were obtained by JEM- 2000FX. Fe^3＋ , Co^3＋ , and Ni^3＋ exist in vernadite as high spin. Co^3＋ , Ni^3＋ , and Cu^3＋ are easy to substitute for Mn^4＋ in vernadite in a complete isomorphous form. Mn^3＋ is replaced by Fe^3＋ in a limited isomorphous pattern. The reaction is 3Mn^4＋ = 4Co^3＋ （Ni^3＋ .Cu^3＋ .Fe^3＋ ）, reaching the total electrovalent equilibrium in the system.

关 键 词：水羟锰矿 晶体形态 电子衍射结构 类质同像 富钴结壳 太平洋 

分 类 号：P618.62[天文地球—矿床学]