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Five calc-alkaline plutons; Um Tagher, Abu Zawil, Um Gidri, Um Anab and El Ghuzah, in the northern Eastern Desert of Egypt were subjected to petrographic and mineralogical investigations. They are composed of varying proportions of quartz+plagioclase+potash feldspar+biotite +hornblende+/-epidote+/-calcite+titanite+magnetite+apatite and zircon.Electron microprobe analyses of coexisting hornblende and...
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