干旱区生态环境知识资源中心(Arid): Petrogenesis of post-orogenic Pan-African rare-element granitic pegmatites in the western Arabian-Nubian Shield, Aswan area, southern Egypt

Arid

DOI	10.1016/j.jseaes.2021.105003
	Petrogenesis of post-orogenic Pan-African rare-element granitic pegmatites in the western Arabian-Nubian Shield, Aswan area, southern Egypt
	Abdelfadil, Khaled M.; Gharib, Moustafa E.; Uher, Pavel; Putis, Marian
通讯作者	Abdelfadil, KM (corresponding author), Sohag Univ, Fac Sci, Dept Geol, Sohag 82524, Egypt.
来源期刊	JOURNAL OF ASIAN EARTH SCIENCES
ISSN	1367-9120
EISSN	1878-5786
出版年	2022
卷号	224
英文摘要	Pegmatites with rare-element mineralization from the Aswan area in southern Egypt intruded the post-orogenic Pan-African granitic rocks and the associated gneisses. The granitic pegmatites show a regular pattern of concentric zoning and display a weak affinity to the Nb-Y-F (NYF) pegmatite family. These pegmatites consist mainly of K-feldspar, albite, quartz, and subordinate muscovite, accessory minerals include Nb-Ta oxide minerals, monazite-(Ce), xenotime-(Y), zircon, rutile, and magnetite. Field observations combined with the petrography, mineralogy and geochemistry of pegmatites and associated rocks in the Aswan area indicate that the pegmatites evolved via fractional crystallization of the parental granitic magma with an effective role for the post-magmatic alterations. The wide compositional variations of Nb-Ta minerals in term of their major and trace elements reflect the pegmatite formation stages. Primary magmatic generation of columbite-(Fe) occurs as homogeneous grains or showing oscillatory zoning with high Nb/Ta and Fe/Mn ratios. Late ixiolite shows patchy and irregular zoning with high Sc and W replacing the earlier regular texture, indicating metasomatic replacement. Electron microprobe U-Th-Pb dating of monazite from the studied pegmatites yielded post-orogenic PanAfrican age of 578 +/- 5 Ma, comparable with age of the fine-grained granite in this area, but it is younger than the previously estimated U-Pb zircon age of surrounding the Monumental granites and gneisses (similar to 600 to 620 Ma). The similarity in age and geochemical characteristics of the pegmatites and the fine-grained granite proved their genetic relationship.
英文关键词	Rare-element pegmatites Aswan pegmatites Pan-African Columbite Monazite Xenotime Ixiolite
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000729113100002
WOS关键词	A-TYPE GRANITES ; GEOCHEMICAL CHARACTERISTICS ; METAL PEGMATITES ; SOLID-SOLUTIONS ; EASTERN DESERT ; COMPLEX ; DISCRIMINATION ; ZIRCON ; MINERALOGY ; TA
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/2XILL650/374505
作者单位	[Abdelfadil, Khaled M.] Sohag Univ, Fac Sci, Dept Geol, Sohag 82524, Egypt; [Gharib, Moustafa E.] Helwan Univ, Fac Sci, Geol Dept, Cairo 11795, Egypt; [Uher, Pavel; Putis, Marian] Comenius Univ, Fac Nat Sci, Dept Mineral Petrol & Econ Geol, Ilkovicova 6, Bratislava 84215, Slovakia; [Abdelfadil, Khaled M.] Jacobs Univ, Dept Phys & Earth Sci, Campus Ring 1, D-28759 Bremen, Germany
推荐引用方式 GB/T 7714	Abdelfadil, Khaled M.,Gharib, Moustafa E.,Uher, Pavel,et al. Petrogenesis of post-orogenic Pan-African rare-element granitic pegmatites in the western Arabian-Nubian Shield, Aswan area, southern Egypt[J],2022,224.
APA	Abdelfadil, Khaled M.,Gharib, Moustafa E.,Uher, Pavel,&Putis, Marian.(2022).Petrogenesis of post-orogenic Pan-African rare-element granitic pegmatites in the western Arabian-Nubian Shield, Aswan area, southern Egypt.JOURNAL OF ASIAN EARTH SCIENCES,224.
MLA	Abdelfadil, Khaled M.,et al."Petrogenesis of post-orogenic Pan-African rare-element granitic pegmatites in the western Arabian-Nubian Shield, Aswan area, southern Egypt".JOURNAL OF ASIAN EARTH SCIENCES 224(2022).