This article discussed the petrographic and geochemical characteristics and tectonic setting of Abu-Marawat metavolcanics as part of the Arabian–Nubian Shield in the Central Eastern Desert of Egypt. They comprise metamorphosed basalt, basaltic andesites, dacite, and rhyolites associated with their volcaniclastics. The presence of large amounts of pyroclastics infers that their magma were erupted in submarine environments. They underwent low-grade regional metamorphism related to greenschist facies during the Pan-African orogeny. The geochemical characteristics revealed that the metavolcanics are characterized by low-medium-k calc-alkaline affinity. Analyses of major and trace elements showed that these rocks are relatively enriched in large ion lithophile elements (LILEs; Ba, Rb, K, Pb, and Sr) and depleted in high field strength elements (HFSEs; Zr, Y, P, and Ti) proving subduction component. The marked depletion of specific trace and major elements from basalts to rhyolites reflected the magmatic fractionation. Chemical characteristics, tectonic discrimination diagrams, and N-MORB normalized spider plots of the present study support that their magmas were erupted in an arc setting.

本文讨论了埃及中东部沙漠地区的阿布-马拉瓦特超火山的岩石学，地球化学特征和构造背景。它们包括与火山碎屑有关的变质玄武岩，玄武质安山岩，榴辉岩和流纹岩。大量的火山碎屑岩的存在推断其岩浆在海底环境中爆发。他们在泛非造山运动中经历了与绿片岩相有关的低品位区域变质作用。地球化学特征表明，该超火山岩的特征是低-k-钙-碱性亲和力。对主要元素和痕量元素的分析表明，这些岩石相对富含大型的离子亲石元素（LILE； Ba，Rb，K，Pb和Sr），而高场强元素（HFSEs）却贫乏。Zr，Y，P和Ti）证明俯冲分量。从玄武岩到流纹岩的特定痕迹和主要元素的显着减少反映了岩浆分离。本研究的化学特征，构造判别图和N-MORB归一化的蜘蛛图支持它们的岩浆在电弧环境中喷发。