干旱区生态环境知识资源中心(Arid): Petrology,geochemistry,radioactivity,and M-W type rare earth element tetrads of El Sela altered granites,south eastern desert,Egypt

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	Petrology,geochemistry,radioactivity,and M-W type rare earth element tetrads of El Sela altered granites,south eastern desert,Egypt
	El Mezayen A M; Heikal M A; El Feky M G; Shahin H A; Abu Zeid I K; Lasheen S R
来源期刊	Acta Geochimica
ISSN	2096-0956
出版年	2019
卷号	38 期号:1 页码:95-119
英文摘要	The southern part of the Eastern Desert of Egypt-about 30 km southwest of Abu-Ramad city-is mainly covered by ophiolitic rocks (Sul Hamed),island arc assemblage,younger granites (muscovite granites of Qash Amer and two mica granites of El Sela),and various acidic and basic dikes.Field,petrological,and geochemical studies indicate that the El Sela shear zone has been subject to hydrothermal and supergene alteration such as kaolinization,albitization,sericitization,and hematitization.It is invaded by quartz ENE-WSW veins associated with hydrothermal alteration accompanied by radioactive mineralization.The investigated younger granitic rocks had very low contents of compatible elements,such as Cr,Ni,and Co;and high contents of incompatible elements,such as Zr,and large ion lithophiles,such as Sr,especially in the El Sela shear zone.Major oxide and trace element analyses revealed calc-alkaline affinity and peraluminous character.These highly differentiated granitic rocks' lower Zr/Hf and higher Y/Ho than the normal ratio are consistent with hydrothermal alteration.Most samples had rare earth element (REE)-patterns with an M-type tetrad effect in the first and fourth segments and a W-type tetrad in the third segment.The average REE in the studied granites was lower than the world granite average;the ratio of light to heavy REEs greater.The main radioactive,uranium-bearing,and uraniferous Fe and Mn minerals are uranothorite,autunite,uranophane and autunite as compounds,kasolite,columbite,xenotime,uranophane-bearing zircon and jarosite,silver-bearing pyrite,hematite,and autunite-bearing pyrolusite.
英文关键词	Geochemistry REE-tetrad effect Radioactive minerals Radiometric measurements Qash Amer El Sela
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Geology
CSCD记录号	CSCD:6435351
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336073
作者单位	El Mezayen A M, Geology Department,Faculty of Science,Al Azhar University, Cairo, Egypt.; Heikal M A, Geology Department,Faculty of Science,Al Azhar University, Cairo, Egypt.; Lasheen S R, Geology Department,Faculty of Science,Al Azhar University, Cairo, Egypt.; El Feky M G, Nuclear Material Authority, Cairo, Egypt.; Shahin H A, Nuclear Material Authority, Cairo, Egypt.; Abu Zeid I K, Nuclear Material Authority, Cairo, Egypt.
推荐引用方式 GB/T 7714	El Mezayen A M,Heikal M A,El Feky M G,et al. Petrology,geochemistry,radioactivity,and M-W type rare earth element tetrads of El Sela altered granites,south eastern desert,Egypt[J],2019,38(1):95-119.
APA	El Mezayen A M,Heikal M A,El Feky M G,Shahin H A,Abu Zeid I K,&Lasheen S R.(2019).Petrology,geochemistry,radioactivity,and M-W type rare earth element tetrads of El Sela altered granites,south eastern desert,Egypt.Acta Geochimica,38(1),95-119.
MLA	El Mezayen A M,et al."Petrology,geochemistry,radioactivity,and M-W type rare earth element tetrads of El Sela altered granites,south eastern desert,Egypt".Acta Geochimica 38.1(2019):95-119.