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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 |
ISBN | 90-5809-163-5 |
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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