摘要
借助顺序提取技术对西太平洋富钴结壳的铁、锰氧化物进行了分级提取,并利用电感耦合等离子体光谱仪测定了其微量元素的组成。结果表明:锰矿物相(-δMnO2)主要富集Mn、Ba、Co、Ni、Sr;铁矿物相(FeOOH)富集Fe、As、Cu、Mo、P、Pb,V、Zn。计算了Co、Cu、Ni和Zn元素在铁、锰两相之间的分配系数D=(M/Fe)铁相/(M/Mn)锰相,探讨了其作为古环境替代指标的可行性。发现Co、Cu、Ni和Zn的分配系数与其在富钴结壳中的总质量分数无关,而与海洋生产力存在明显的正相关,其作用机理有待于进一步的研究。
Sequential leaching technology combined with inductively coupled plasma atomic emission spectroseopy（ICP-AES） was used to analyse cobalt-rich crust from Western Pacific seamounts. The results show that Mn, Ba, Co, Ni, Sr mainly enriched in manganese oxide phase（δ-MnO2）, meanwhile Fe, As, Cu, Mo, P, Pb, V and Zn relatively enriched in iron oxide phase （FeOOH）. Here, the partition coeffi- cient is defined as D = （M/Fe）Fe-phase/（M/Mn）Mn-phase to investigate the distribution characteristics of the trace elements. It is shown that there is a distinct D between hydrogenetic and hydrothermal precipitations. It is also noted that D has no correlation with the metal concentration but a positive correlation with marine primary productivity. Hence, partition coefficient between two major phases may be a potential proxy of paleoenvironment.
出处
《地质科技情报》
CAS
CSCD
北大核心
2008年第5期54-58,共5页
Geological Science and Technology Information
基金
国家自然科学基金重点项目(40531004)
中国大洋协会"十五"课题(DY-105-1-4-05)
中国石油化工股份有限公司"十一五"课题(G0800-06-2S-319)
关键词
富钴结壳
铁锰相
微量元素
分配系数
生产力
Co-rich crust
iron oxide and manganese oxide phase
trace element
partition coefficient
primary productivity
