检索结果-南通市图书馆

检索条件"主题词=magnetite-BIF"

共 1 条记录，以下是1-10 订阅

全选清除本页清除全部题录导出标记到"检索档案"

详细简洁

排序：

Modeling and Targeting of Iron Resources with ETM+Data Interpretation, Alteration Mineral Mapping and Synthetic Analysis, Tonkolili Iron Field, Northern Sierra Leone

Modeling and Targeting of Iron Resources with ETM+Data Inter...

引用

作者： Lamin Rahman Mansaray 长安大学

学位级别：硕士

Iron resources have become very important in the global economy as they provide theinputs for the steel industry. The rapid industrial development of countries such as China,India, Brazil and other emerging economies in Asia and Africa have led to an increasingdemand for steel products. This has resulted to an increase in global iron ore *** in the world’s biggest underdeveloped iron ore province (West Africa), SierraLeone is correspondingly home to Africa’s largest iron ore (magnetite) deposit at *** Tonkolili iron field in northern Sierra Leone forms the focus of this study. Theprimary iron mineralization here is magnetite. At the laterite and saprolite horizons havedeveloped a supergene iron-oxide enrichment blanket which covers almost the entirearea. Iron-oxides show diagnostic spectral features in the visible near infra-red (VNIR)portions of the electromagnetic spectrum which allows their remote *** this study, Landsat7Enhanced Thematic Mapper plus (ETM+) data are applied inmodeling and targeting iron resources in Tonkolili. The key objectives are the mapping ofbanded iron formation (bifs), discrimination of alteration zones and targeting new areasfor bifs and haematite prospects in the Tonkolili iron field. The methods employed inETM+image enhancement are the RGB, Crosta, band ratios and false color *** results show that for the mapping of magnetite-bif, the ETM321and754in RGBcolor composites produced the most spectrally unique colors. The principal component-based Crosta technique enhanced areas with iron-oxides and hydroxyl-bearing *** band ratio technique was only effective in enhancing areas with iron-oxide mineralsusing band ratios3/1and5/4. The modeled alteration anomalies were overlain with thesimplified geological map of Tonkolili and iron-oxide anomalies were found to followthe NE-SW trending of magnetic anomalies. This trend points to the fact that oxidative-weathering of the surface magnetite

关键词： Tonkolili iron resources magnetite-bif alteration mapping ETM+data

来源：

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

全选清除本页清除全部题录导出标记到“检索档案”

共1页 << < 1 > >>

回到顶部

执行限定条件

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

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

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：