Authors
1
Geology Department, Faculty of Science, Al Azhar University, Cairo, Egypt.
2
Tiba University, AL Madina El Menwarah, Saudi Arabia.
3
Faculty of Engineering, Northern Border Univ. Arar, Saudi Arabia.
4
Metallurgical Development Research Center, Helwan, Egypt .
Abstract
Wadi El- Sherm El- Qibli granite outcrops forming the northern - northeastern rims of Wadi El Sherm
El Qibli comprise two types; pale whitish pink altered muscovite albite granite (M A granite with
alteration zones) and the red alkali feldspar granite (A F granite). The A F granites are intruding with
sharp intrusive contact the M A granite, island arc meta-volcano-sedimentary and meta-andesite rocks.
The A F granites are coarse- grained, composed of quartz, orthoclase, microcline, and plagioclase
arranged in decreasing order with the accessories; zircon, muscovite, sericite and opaques, showing
hypidiomorphic, occasionally porphyritic, more common perthitic and pioklitic textures of anorogenic
within-plate tectonic setting. The EDAX and ore microscope investigations recorded magnetite, ilmenite,
hematite, pyrite, arsenopyrite, galena, rutile, zircon and monazite. Besides these investigations show that
hematite- rutile, sericite-muscovite, are alteration products of ilmenite and plagioclase respectively. As
well, the substitution of zircon by REEs, U, Hf, and the stannite - celestite are products of alteration
processes due to action of oxidizing hydrothermal fluids co-magmatic to the intrusion of the A F granites.
The recorded Cr, Ni, Sn, Nb, Ba, Sr, Cu, Zn, Pb geochemical association beside the recorded Au in Khor
Abu-Meriewa is an evidence of existence of cordilleran-extensional gold deposit at deeper levels and Nb-
U-Th-REEs-Hf mineralization occurs within the alteration zones of M A granite.
Keywords
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