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A suite of mantle–crust transition zone (Moho transition zone = MTZ) rocks are exceptionally well exposed in Gebel Mudarjaj area, southeastern desert of Egypt. The MTZ rocks were thermally metamorphosed by younger granitic intrusion, forming mafic–ultramafic hornfels with characteristic metamorphic mineral assemblages. The MTZ rocks are remarkably thin (30–50m thick) and are composed mainly of dunites,...
Akarem Intrusion in the southern part of the Eastern Desert of Egypt is one of Alaskan-type ultramafic-mafic complexes of the Neoproterozoic age. The olivine and pyroxene-rich ultramafic core is surrounded by hornblende gabbro and hornblendite margin with gradational contacts. The pyroxene chemistry indicates that the intrusion was crystallized from tholeiitic arc magmas. The calculated liquids in...
The late Neoproterozoic of Wadi Ranga area, south Eastern Desert was characterized by extensive magmatism consisting predominantly of calc-alkaline older granitoids, Ranga volcanics and granite porphyry intrusions forming a belt of volcanic-intrusive complexes. Geological studies of the Ranga volcanics revealed two sequences of volcanic suites: the older mafic sequence composed essentially of basalt/basaltic...
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