Arid
DOI10.1016/j.oregeorev.2012.12.009
Mineralogy, geochemistry and origin of Mn in the high-Mn iron ores, Bahariya Oasis, Egypt
Baioumy, Hassan M.1; Khedr, Mohamed Z.2; Ahmed, Ahmed H.3
通讯作者Baioumy, Hassan M.
来源期刊ORE GEOLOGY REVIEWS
ISSN0169-1368
EISSN1872-7360
出版年2013
卷号53页码:63-76
英文摘要

Although Mn is one of the major impurities in the economic iron ores from the Bahariya Oasis, information on its modes of occurrence and origin is lacking in previous studies. High-Mn iron ores from El Gedida and Ghorabi-Nasser iron mines were subjected to detailed mineralogical, geochemical, and petrographic investigations using X-ray diffraction (XRD), infrared absorption spectrometry (IR), Raman spectroscopy, X-ray fluorescence (XRF), scanning electron microscopy (SEM), and electron probe microanalyzer (EPMA) to clarify the modes of occurrence of Mn in these deposits and its origin. The results showed that the MnO2 contents range between 0.03 and 13.9 wt.%. Three mineralogical types have been identified for the Mn in the high-Mn iron ores, including: (1) inclusions within the hematite and goethite and/or Mn accumulated on their active surfaces, (2) coarse-grained and crystalline pyrolusite, and (3) fine-grained cement-like Mn oxide and hydroxide minerals (bixbyite, cryptomelane, aurorite, romanechite, manjiroite, and pyrochroite) between the Fe-bearing minerals. The Mn carbonate mineral (rhodochrosite) was detected only in the Ghorabi-Nasser high-Mn iron ores. Since IR patterns of low-Mn and high-Mn samples are almost the same, a combination of XRD analysis using non-filtered Fe-K alpha radiations and Raman spectroscopy could be the best way to identify and distinguish between different Mn minerals.


Assuming that both Fe and Mn were derived from the same source, the occurrence of high-Mn iron ores at the base of the stratigraphic section of the deposits overlain by the low-Mn iron ores indicated a supergene origin of the studied ores by descending solutions. The predominance of Mn oxide and hydroxide minerals in botryoidal shapes supports this interpretation. The small grain size of Mn-bearing minerals as well as the features of microbial fossils such as spherical, elliptical, and filamentous shapes of the Fe-bearing minerals suggested a microbial origin of studied iron ores.


Variations in the distribution and mineralogy types of Mn in the iron ores of the Bahariya Oasis demanded detailed mineralogical and petrographic characterizations of the deposits before the beneficiation of high-Mn iron ores from the Bahariya Oasis as feedstock for the ironmaking industries in Egypt by magnetizing reduction. High Mn contents, especially in the Ghorabi-Nasser iron ore and occurrence of Mn as inclusions and/or accumulated on the surface of the Fe-bearing minerals would suggest a possible utilization of the high-Mn iron ores to produce ferromanganese alloys. (C) 2012 Elsevier B.V. All rights reserved.


英文关键词Manganese Iron ores Bahariya Oasis Egypt
类型Review
语种英语
国家Egypt
收录类别SCI-E
WOS记录号WOS:000318453000005
WOS关键词MANGANESE DEPOSITS ; WESTERN DESERT ; RAMAN-SPECTROSCOPY ; OXIDES ; MN(II) ; OXIDATION ; KINETICS ; FEOOH
WOS类目Geology ; Mineralogy ; Mining & Mineral Processing
WOS研究方向Geology ; Mineralogy ; Mining & Mineral Processing
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/179087
作者单位1.Cent Met R&D Inst, Cairo, Egypt;
2.Kafr El Sheikh Univ, Fac Sci, Dept Geol, Kafr Al Sheikh, Egypt;
3.Helwan Univ, Fac Sci, Dept Geol, Cairo, Egypt
推荐引用方式
GB/T 7714
Baioumy, Hassan M.,Khedr, Mohamed Z.,Ahmed, Ahmed H.. Mineralogy, geochemistry and origin of Mn in the high-Mn iron ores, Bahariya Oasis, Egypt[J],2013,53:63-76.
APA Baioumy, Hassan M.,Khedr, Mohamed Z.,&Ahmed, Ahmed H..(2013).Mineralogy, geochemistry and origin of Mn in the high-Mn iron ores, Bahariya Oasis, Egypt.ORE GEOLOGY REVIEWS,53,63-76.
MLA Baioumy, Hassan M.,et al."Mineralogy, geochemistry and origin of Mn in the high-Mn iron ores, Bahariya Oasis, Egypt".ORE GEOLOGY REVIEWS 53(2013):63-76.
条目包含的文件
文件名称/大小 资源类型 版本类型 开放类型 使用许可
Mineralogy, geochemi(3573KB)期刊论文出版稿开放获取CC BY-NC-SA浏览
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Baioumy, Hassan M.]的文章
[Khedr, Mohamed Z.]的文章
[Ahmed, Ahmed H.]的文章
百度学术
百度学术中相似的文章
[Baioumy, Hassan M.]的文章
[Khedr, Mohamed Z.]的文章
[Ahmed, Ahmed H.]的文章
必应学术
必应学术中相似的文章
[Baioumy, Hassan M.]的文章
[Khedr, Mohamed Z.]的文章
[Ahmed, Ahmed H.]的文章
相关权益政策
暂无数据
收藏/分享
文件名: Mineralogy, geochemistry and origin of Mn in the high-Mn iron ores, Bahariya Oasis, Egypt.pdf
格式: Adobe PDF
此文件暂不支持浏览

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。