Synplutonic dikes in the wadi Um-Mara area, Sinai

Sets of parallel andesitic schistose dikes intruding granodiorite country rocks were themselves intruded by the same country rock. This mutual cross-cutting relationship is explained as synplutonic dikes that intruded the granodioritic crystal mush in its last stages of crystallization. Four deformation phases affected the dikes as a result of which they became schistose and were folded, faulted, boudinaged and rotated. The kind of strain was dependent on relative competency of these dikes and the granodiorite which changes during the cooling history. All the deformation phases ceased before the end of crystallization of the granodioritic body.