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The Precambrian chromites of the Eastern Desert (Egypt) chromite mineral chemistry
Attia, AKM; Boulis, SN; Ahmed, AH; Hilmy, ME; Garuti, G; Zaccarini, F
通讯作者Attia, AKM
会议名称6th International Congress on Applied Mineralogy (ICAM 2000)
会议日期JUL 17-19, 2000
会议地点GOTTINGEN, GERMANY
英文摘要

Chromite deposits occur in the Eastern Desert of Egypt related with altered and metamorphosed Precambrian ophiolites. The composition of chromite has been investigated by electron microprobe, in selected samples from a number of localities. Chromite generally displays rims of magnetite and cores of chromite grains and shows TiO2 < 0.30 wt% and Fe2O3 less than 6.0 wt% and Cr-Al and Fe-Mg distribution in agreement with the attribution of the chromites to the podiform type. Two main groups of chromitite have been identified corresponding to Cr-rich (Cr2O3 = 55-63 wt%) and Al-rich (Al2O3 = 19-27 wt%) ores. This feature previously unreported for chromitites of this area suggests that the Precambrian ophiolites of the Eastern Desert are similar to Mesozoic and Paleozoic ophiolite complexes characterized by bimodal distribution and vertical zoning of the chromite deposits. The low silica and iron content recorded in the studied chromite make them quite suitable for refractory purposes.


来源出版物APPLIED MINERALOGY, VOLS 1 AND 2
出版年2000
页码259-262
ISBN90-5809-163-5
出版者A A BALKEMA PUBLISHERS
类型Proceedings Paper
语种英语
国家Egypt
收录类别CPCI-S
WOS记录号WOS:000089525700067
WOS类目Mineralogy
WOS研究方向Mineralogy
资源类型会议论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/292911
作者单位(1)Cent Met R&D Inst, Cairo, Egypt
推荐引用方式
GB/T 7714
Attia, AKM,Boulis, SN,Ahmed, AH,et al. The Precambrian chromites of the Eastern Desert (Egypt) chromite mineral chemistry[C]:A A BALKEMA PUBLISHERS,2000:259-262.
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