检索结果-南通市图书馆

The distribution of iodine and effects of phosphatization on it in the ferromanganese crusts from the mid-pacific ocean

引用

Acta oceanologica Sinica 2015年第8期34卷 13-19页

作者： JI Lihong LIU Guangshan HUANG Yipu XING Na CHEN Zhigang College of ocean and Earth Sciences Xiamen University College of Resources and Environment Linyi University

In the present paper, iodine （I）, iron （Fe）, manganese （Mn）, cobalt （Co）, phosphorus （P） and calcium （Ca） contents in three ferromanganese crusts from the pacific ocean are measured by spectrophotometric method and inductively coupled plasma atomic emission spectrometers （ICP-AES） to investigate the contents and distribution of iodine in ferromanganese crusts. The results show that iodine contents in three crusts vary between 27.1 and 836 mg/kg, with an average of 172 mg/kg, and the profile of iodine in the three crusts all exhibits a two-stage distribution zone： a young non-phosphatized zone and an old phosphatized zone that is rich in I, P and Ca. The iodine content ratios of old to young zone in MP5D44, CXD62-1 and CXD08-1 are 2.3, 3.4 and 13.7, respectively. The boundary depths of two-stage zone in MP5D44, CXD62-1 and CXD08-1 locate at 4.0 cm, 2.5 cm and 3.75 cm, respectively, and the time of iodine mutation in three crusts ranges from 17-37 Ma derived from 129I dating and Co empirical formula, which is consistent with the times of Cenozoic phosphatization events. The present study shows that the intensity of phosphatization is the main responsible for the distribution pattern of iodine in the crusts on the basis of the correlation analysis. Consequently, iodine is a sensitive indicator for phosphatization.

关键词： ferromanganese crust iodine phosphatization mid-pacific ocean two-stage distribution

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Geochemistry of rare earth elements in cobalt-rich crusts from the mid-pacific M seamount

引用

Journal of Rare Earths 2009年第1期27卷 169-176页

作者：崔迎春刘季花任向文石学法 Institute of oceanology Chinese Academy of Sciences Key Lab of Marine Sedimentology and Environmental Geology of State oceanic Administration First Institute of Oceanography Graduate University of Chinese Academy of Sciences

Rare earth elements（REEs） and major elements of 25 cobalt-rich crusts obtained from different depths of mid-pacific M seamount were analyzed using inductively coupled plasma-atomic emission spectrometer and gravimetric *** results showed that they were hydrogenous crusts with average ∑REE content of 2084.69 μg/g and the light REE（LREE）/heavy REE（HREE） ratio of *** shale-normalized REE patterns showed positive Ce *** total content of strictly trivalent REEs increased with water *** Ce content and LREE/HREE ratios in Fe-Mn crusts above 2000 m were lower than those below 2000 *** change in REE with water depth could be explained by two processes：adsorptive scavenging by setting matters and behaviors of REE in ***, the Ce abundance took no obvious correlation with water depth reflects the constant Ce *** Ce in crusts existed mainly as Ce（IV）, implying that the oxidative-enriching process was controlled by kinetic factors.

关键词： rare earth elements cobalt-rich crusts mid-pacific ocean M seamount

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：