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DOI | 10.1007/s12517-015-1882-8 |
Abu Rusheid lamprophyre dikes, South Eastern Desert, Egypt: as physical-chemical traps for REEs, Zn, Y, U, Cu, W, and Ag | |
Ibrahim, Mohamed El-Ahmady1; Watanabe, Koichiro2; Saleh, Gehad Mohamed1; Ibrahim, Waleed Saad2 | |
通讯作者 | Ibrahim, Mohamed El-Ahmady |
来源期刊 | ARABIAN JOURNAL OF GEOSCIENCES
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ISSN | 1866-7511 |
EISSN | 1866-7538 |
出版年 | 2015 |
卷号 | 8期号:11页码:9261-9270 |
英文摘要 | Five lamprophyre dikes (L-1-L-5) intruded Abu Rusheid rocks (cataclastics and monzogranite) in the South Eastern Desert of Egypt along shear zones with NNW-SSE and E-W. The two sets of dikes differ in age, mineralization, and geochemical aspect. The NNW-SSE trending dikes (L-1 and L-2) are polymineralized and dislocate the E-W (L-3, L-4, and L-5) trending dikes. These dikes underwent multistage of hydrothermal processes (ferrugination, fluoritization, kaolinitization, and calcification). They are characterized by common box works (physical trap) filled by incoming mineralization, and their feldspars and micas are relatively altered to clay minerals (chemical trap). From the mineralogical point of view, the cataclastic rocks are rich in base metals (pyrite, sphalerite, molybdenite, chalcopyrite, and galena), radioactive minerals (thorite, uranophane, kasolite, uranothorite), and accessories phases (zircon, xenotime, cassiterite, molybdenite, copper, columbite, and fluorite). L-1 and L-2 lamprophyre dikes contain U minerals (uranophane, kasolite, autunite, and torbernite), Mn-franklinite, woodruffite, xenotime, fluorite, silver, copper, and scheelite. L-3 contains Zn and U minerals, whereas L-4 and L-5 contain Zn minerals only. The source magma producing lamprophyre dikes (L-1 to L-4) are peralkaline to alkaline, whereas L-5 lamprophyres are mainly calc-alkaline in character; they were generated from the mantle and had formed in a post-collision tectonic setting with extensive Ti-rich metasomatism. The average I REE pound content in (L-1 and L-2) lamprophyres is 8006 ppm. REE patterns display clear concave upward pattern of W-type tetrad effect in the REE pattern accompanied by enrichment of the HREE over the LREE and marked negative Eu anomaly due to secondary mobilization of REEs. |
英文关键词 | Lamprophyre Traps Uranium Zinc REEs |
类型 | Article |
语种 | 英语 |
国家 | Egypt ; Japan |
收录类别 | SCI-E |
WOS记录号 | WOS:000363719600021 |
WOS关键词 | CLASSIFICATION ; DEPOSITS ; ROCKS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/185942 |
作者单位 | 1.Nucl Mat Author, Cairo, Egypt; 2.Kyushu Univ, Fac Engn, Fukuoka 812, Japan |
推荐引用方式 GB/T 7714 | Ibrahim, Mohamed El-Ahmady,Watanabe, Koichiro,Saleh, Gehad Mohamed,et al. Abu Rusheid lamprophyre dikes, South Eastern Desert, Egypt: as physical-chemical traps for REEs, Zn, Y, U, Cu, W, and Ag[J],2015,8(11):9261-9270. |
APA | Ibrahim, Mohamed El-Ahmady,Watanabe, Koichiro,Saleh, Gehad Mohamed,&Ibrahim, Waleed Saad.(2015).Abu Rusheid lamprophyre dikes, South Eastern Desert, Egypt: as physical-chemical traps for REEs, Zn, Y, U, Cu, W, and Ag.ARABIAN JOURNAL OF GEOSCIENCES,8(11),9261-9270. |
MLA | Ibrahim, Mohamed El-Ahmady,et al."Abu Rusheid lamprophyre dikes, South Eastern Desert, Egypt: as physical-chemical traps for REEs, Zn, Y, U, Cu, W, and Ag".ARABIAN JOURNAL OF GEOSCIENCES 8.11(2015):9261-9270. |
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