Structures related to Red Sea evolution in northern Eritrea

摘要: Structural analysis of remotely sensed images Eritrea, guided by the common presence a mid-Oligocene datum at base flood basalt different elevations, helps to piece together Tertiary history western flank Red Sea basin. Many faults are reactivated shear zones in Pan-African basement, most important fault foot Escarpment marking site pre-Tertiary boundary between andesitic island-arc crust and deeper, perhaps older granitoid migmatites. The initiation extensional sedimentary basins Eritrea clearly followed volcanism, as did doming uplift. This sequence lends some support active mantle upwelling primary tectonic impetus, specifically massive melting simultaneous with plume impact lithosphere. coincidence major mid-crustal lower-crustal silicic basement may indicate that processes were focused Theologically weak lithosphere, postulated Dixon et al. (1989).