Petrogenesis,Geodynamics and Radioactivity of the Granitic Rocks of the Nugrus Weakness Zone,South Eastern Desert,Egypt

作     者：Soliman ABU ELATTA Abdallah Mahmoud Gehad M.R.MANSOUR Soliman ABU ELATTA Abdallah Mahmoud;Gehad M.R.MANSOUR

作者机构：Nuclear Materials AuthorityCairoEgypt.P.O.Box 530 El Maadi 

出 版 物：《Acta Geologica Sinica(English Edition)》 (地质学报（英文版）)

年 卷 期：2021年第95卷第4期

页      面：1183-1198页

核心收录：

学科分类：0709[理学-地质学] 070901[理学-矿物学、岩石学、矿床学] 07[理学] 

主　　题：partial melting biotite-muscovite granites peraluminous geodynamic radioactivity Nugrus 

摘      要：The studied granitic bodies belong to the south Eastern Desert of *** extend in a NNW–SSE trend along the same strike of the Nugrus weakness zone by which they are structurally *** rocks are composed of biotite and biotite-muscovite monzogranites to ***,a higher abundance of Ba and Rb in biotite granites with a relatively low abundance in biotite-muscovite granites as well as the diversity of Th,U,Nb,Ta,Zr,and REE reflects their origin from different sources and geodynamic *** biotite granites are predominantly metaluminous to low peraluminous whereas the biotite-muscovite granites have a peraluminous *** enrichment at the expense of calcium in these rocks reflects a derivation from crustal sources by partial melting in the presence of a volatile *** investigation showed high abundances of U(up to 38 ppm)and Th(up to 26 ppm)in biotite-muscovite granites relative to biotite granites(up to 5 ppm U and 18 ppm Th).Radioactive anomalies furthermore have been recorded in parts of biotite-muscovite granites that were affected by the faults(up to 116 ppm eU and 97 ppm eTh).Consequently,biotite-muscovite granites form a potentially fertile source for uranium mineralization.