干旱区生态环境知识资源中心(Arid): Geochemistry, mineralogy, and radioactivity of the Abu Furad Area, Central Eastern Desert, Egypt

Arid

DOI	10.1007/s11631-018-0302-7
	Geochemistry, mineralogy, and radioactivity of the Abu Furad Area, Central Eastern Desert, Egypt
	El Mezayen, A. M.; Abu Zeid, E. K.; Hosny, W. S.; El-Feky, M. G.; Omar, S. M.; Taalab, S. A.
通讯作者	Taalab, SA
来源期刊	ACTA GEOCHIMICA
ISSN	2096-0956
EISSN	2365-7499
出版年	2019
卷号	38 期号:2 页码:307-326
英文摘要	Abu Furad is in the Central Eastern Desert, Egypt. It comprises metasediments, metavolcanics, metagabbros, syn- to late-orogenic granites, and post-orogenic granites, in addition to numerous dykes and veins of different shapes and composition invading all the older rocks cropping out in the study area. Field, petrographic, mineralogical, and chemical investigations led to the classification of Abu Furad granites as quartz diorite, tonalite, granodiorite, and syenogranites.Major oxide and trace element data revealed that the syn- to late-orogenic granites and post-orogenic granites are peraluminous. Syn- to late-orogenic granites originated from calc-alkaline volcanic arc-related magma; while the post-orogenic granites (syenogranite) are highly fractionated, calc-alkaline granite from a within plate regime. Radiometrically, the studied quartz diorite, tonalite, and granodiorite had lower uranium and thorium contents and higher eU/eTh ratios than the syenogranites. This may indicate that the syn- to late-orogenic rocks originated from sources depleted in these elements. The average eTh/eU ratio of syenogranites was higher than that of average continental crust, suggesting that the syenogranites are relatively depleted in U. The studied altered syenogranites were strongly enriched in U and Th compared to the Earth's crust. On the other hand, the average of eU in pegmatites is lower than the global average for uraniferous pegmatites. The most recorded accessory minerals in the altered syenogranites were thorite, fergusonite, samarskite, columbite, zircon, monazite, xenotime, apatite, fluorite, sphene, atacamite, and malachite, in addition to chromium and nickel inclusions.
英文关键词	Hydrothermal alterations Major oxide and trace elements Radiometry Mineralogy Geochemistry Altered syenogranites Egypt
类型	Article
语种	英语
收录类别	ESCI
WOS记录号	WOS:000460607100010
WOS关键词	GRANITES ; DISCRIMINATION ; CLASSIFICATION ; ISHIKAWAITE ; SAMARSKITE ; CHEMISTRY ; ELEMENT
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/333427
作者单位	[El Mezayen, A. M.; Taalab, S. A.] Al Azhar Univ, Geol Dept, Fac Sci, Cairo, Egypt; [Abu Zeid, E. K.; Hosny, W. S.; El-Feky, M. G.; Omar, S. M.] Nucl Mat Author, Cairo, Egypt
推荐引用方式 GB/T 7714	El Mezayen, A. M.,Abu Zeid, E. K.,Hosny, W. S.,et al. Geochemistry, mineralogy, and radioactivity of the Abu Furad Area, Central Eastern Desert, Egypt[J],2019,38(2):307-326.
APA	El Mezayen, A. M.,Abu Zeid, E. K.,Hosny, W. S.,El-Feky, M. G.,Omar, S. M.,&Taalab, S. A..(2019).Geochemistry, mineralogy, and radioactivity of the Abu Furad Area, Central Eastern Desert, Egypt.ACTA GEOCHIMICA,38(2),307-326.
MLA	El Mezayen, A. M.,et al."Geochemistry, mineralogy, and radioactivity of the Abu Furad Area, Central Eastern Desert, Egypt".ACTA GEOCHIMICA 38.2(2019):307-326.