Subsurface structure of magmatic segments during continental breakup: Perspectives from a gravity data analysis along the Main Ethiopian Rift

In magma-rich continental rifts, extension is commonly localized as dike injection in discrete magmatic segments which appear from surface geology to mimic the along-axis segmentation of ocean ridges. However, subsurface morphology these zones magma unclear, and whether at what depth range they remain with subvolcanic plumbing systems not fully understood. addition, relationship between tectonic faulting also debated. The Main Ethiopian Rift (MER) provides a unique opportunity examine spatial scale, locus, geometries localization active rifts. We examined variations structure crust MER using gravity data better understand pattern injection. Results our study reveal Bouguer highs centers distinct right-stepping (Aluto, Gedemsa, Boseti), interpreted locus mafic intrusions. show that boundary each segment observed down depths ?20 km, suggesting have least mid-crust. Additionally, incorporating fault network shows densest occurs tips shown by highs. This similar axial slow ultra-slow spreading ridges suggests strong deformation mechanism, accommodating dominating towards ends. rift margin volcanic (Siltie Debrezeit, Yerer Tulu, Galema) are inferred bandpass anomaly maps, supported petrologic evidence, implies has occurred near flanks.