Spreading segments of the Mid-Atlantic Ridge show negative bull's-eye anomalies in the mantle Bouguer gravity field. Seismic refraction results from 33 degrees S indicate that these anomalies can be accounted for by variations in crustal thickness along a segment. The crust is thicker in the center and thinner at the end of the spreading segment, and these changes are attributable to variations...

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 tectoni...

SUMMARY The complex Moho topography beneath the northwestern Andes is result of multiple geodynamic processes during Cenozoic. To contribute to our understanding depth distribution this region, we inverted gravity data from two widely used satellite-derived sets (EGM2008 and EIGEN-6C4) one regional airborne Bouguer anomaly map (ANH2010). Their inversion allowed choosing ANH2010, based on lower ...