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| 1 | Petrology, geochemistry, radioactivity, and M–W type rare earth element tetrads of El Sela altered granites, south eastern desert,Egypt显示文摘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. | A.M.El Mezayen M.A.Heikal M.G.El-Feky H.A.Shahin I.K.Abu Zeid S.R.Lasheen | 2019 | Acta Geochimica2019，38，1： | 1 |
| 2 | Endogenous signalsreleased from necrotic cells augment inflammatory responses to bac-terial endotoxin显示文摘 | El Mezayen R El Gazzar M Seeds MC | 2007 | Immunol Lett2007，111，1： | 1 |
| 3 | Endogenous signals released from necrotic cells augment inflammatory responses to bacterial endotoxin显示文摘 | Rabab El Mezayen Mohamed El Gazzar Michael C. Seeds Charles E. McCall Stephen C. Dreskin Mark R. Nicolls | 2007 | Immunology Letters2007，，1： | 1 |
| 4 | Endogenous signals released from necrotic cells augment inflammatory responses to bac- terial endotoxin显示文摘 | EI Mezayen R EI Gazzar M Seeds MC | 2007 | Immunol Lett2007，111，1： | 1 |
| 5 | Anti-inflammatory effect of thymoquinone in a mouse model of allergic lung inflammation显示文摘 | El GAZZAR M El MEZAYEN R MARECKI J C | | 0，，07： | 1 |
| 6 | Endogenous signals released from necrotic cells augment inflammatory responses to bacterial endotoxin 显示文摘 | El Mezayen R El Gazzar M seeds MC | 2007 | lmmtmol Lett2007，111，1： | 1 |
| 7 | Remote sensing detection of gold related alteration zones in Um Rus area,Central Eastern Desert of Egypt显示文摘 | Amer R Kusky T E1 Mezayen A | | 0，，01： | 1 |
| 8 | Endogenous signals released from necrotic cells augment inflammatory responses to bacterial endotoxin 显示文摘 | El Mezayen R El Gazzar M Seeds MC | 2007 | Immunol Letter2007，111，1： | 1 |
| 9 | Effect of thymoquinone on cyclooxygenase expression and prostaglandin production in a mouse model of allergic airway inflammation显示文摘 | E1 Mezayen R E1 Gazzar M Nicolls MR Marecki JC Dreskin SC Nomiyama H | | 0，，01： | 1 |
| 10 | Effect of thymoquinone on cyclooxygenase expression and prostaglandin production in a mouse model of allergic airway inflammation显示文摘 | EL MEZAYEN R EL GAZZAR M NICOLLS M R | 2006 | Immunol Lett2006，106，： | 1 |
| 11 | Endogenoussignals released from necrotic cells augment inflammatoryresponses to bacterial endotoxin显示文摘 | El Mezayen R El Gazzar M Seeds MC | 2007 | Immunol Lett2007，111，1： | 1 |
| 12 | Contribution of Ara h 2 to peanut-specific, immunoglobulin E-mediated, cell activation显示文摘 | MCDERMOTT R A PORTERFIELD H S EL MEZAYEN R | 2007 | Clin Exp Allergy2007，37，5： | 1 |
| 13 | Endogenous signals released from necrotic cells augment inflammatory responses to bac- terial endotoxin显示文摘 | E1 Mezayen R E1 Gazzar M Seeds MC | 2007 | Immunol Lett2007，111，1： | 1 |
| 14 | Endogenous sig- nals released from necrotic cells augment inflammatory respons- es to bacterial endotoxin 显示文摘 | El Mezayen R E1 Gazzar M Seeds MC | 2007 | Immunol Lett2007，111，1： | 1 |
| 15 | Endogenous signals released from necrotic cells augment inflammatory responses to bac- terial endotoxin 显示文摘 | ~ E1 - Mezayen R El - Gazzar M Seeds MC | 2007 | Immunol Lett2007，111，1： | 1 |
| 16 | Endogenous signals released from necrotic cells augment inflammatory responses to bacterial endotoxin显示文摘 | EI Mezayen R EI Gazzar M seeds MC | 2007 | Immunol Lett2007，111，1： | 1 |
| 17 | Geochemistry, mineralogy, and radioactivity of the Abu Furad Area, Central Eastern Desert, Egypt显示文摘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 lateorogenic 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 e Th/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 e U 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. | A.M.El Mezayen E.K.Abu Zeid W.S.Hosny M.G.El-Feky S.M.Omar S.A.Taalab | 2019 | Acta Geochimica2019，38，2： | 0 |
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