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| Geochemical and Mineralogical Studies of the Mylonite Xenoliths and Monzogranite Rocks at Wadi Abu Rusheid, South Eastern Desert, Egypt: Insights on the Genesis of Mineralization | |
| Kamar Mohamed Salem | |
| 来源期刊 | Acta Geologica Sinica
 |
| ISSN | 1000-9515 |
| 出版年 | 2021 |
| 卷号 | 95期号:5页码:1551-1567 |
| 英文摘要 | Abu Rusheid area lie in the south of the Eastern Desert of Egypt and comprises (1) ophiolitic melange, consisting of ultramafic rocks and layered metagabbros in metasedimentary matrix (2) cataclastic group, consisting of protomylonites, mylonites, ultramylonites and silicified ultramylonites (3) monzogranites (4) pegmatite pockets, quartz veins and postgranite dykes. Focus on the monzogranites and the xenoliths of mylonite rocks from the geochemical and mineralogical points of view introduces a new view about the genesis of the related mineralization. Geochemically, the monzogranites have a metaluminous character and were crystallized under moderate water-vapor pressure around 3 kb and temperatures of 750-800℃. The monzogranites are altered along strike-slip faults exhibiting propylitic, with slightly sodic metasomatism and record high radioactive measurements. The average uranium and thorium (U and Th) contents in fresh monzogranites, mylonite xenolith and altered monzogranites are (7.3, 21.20), (40.36, 94.82), (60.34 and 347.88 ppm), respectively. These high radioactivities are attributed to the presence of kasolite, uranothorite, cerite, fluorite, zircon, apatite and columbite. The mylonite xenolith is higher in radioactivity than the surrounding fresh monzogranites, reflecting U and Th enrichment before emplacement of the monzogranites, then the latter were subjected to right lateral strike-slip faulting with producing hydrothermal solution rich in Th and U. |
| 英文关键词 | geochemistry mineralogy uranium mylonite monzogranites Wadi Abu Rusheid |
| 类型 | Article |
| 语种 | 英语 |
| 收录类别 | CSCD |
| WOS类目 | Mineralogy |
| CSCD记录号 | CSCD:7075976 |
| 资源类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/377399 |
| 作者单位 | Kamar Mohamed Salem, Nuclear Materials Authority, Cairo, Egypt. |
| 推荐引用方式 GB/T 7714 | Kamar Mohamed Salem. Geochemical and Mineralogical Studies of the Mylonite Xenoliths and Monzogranite Rocks at Wadi Abu Rusheid, South Eastern Desert, Egypt: Insights on the Genesis of Mineralization[J],2021,95(5):1551-1567. |
| APA | Kamar Mohamed Salem.(2021).Geochemical and Mineralogical Studies of the Mylonite Xenoliths and Monzogranite Rocks at Wadi Abu Rusheid, South Eastern Desert, Egypt: Insights on the Genesis of Mineralization.Acta Geologica Sinica,95(5),1551-1567. |
| MLA | Kamar Mohamed Salem."Geochemical and Mineralogical Studies of the Mylonite Xenoliths and Monzogranite Rocks at Wadi Abu Rusheid, South Eastern Desert, Egypt: Insights on the Genesis of Mineralization".Acta Geologica Sinica 95.5(2021):1551-1567. |
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