The Kenya rift revisited: insights into lithospheric strength through data-driven 3-D gravity and thermal modelling

摘要: Abstract. We present three-dimensional (3-D) models that describe the present-day thermal and rheological state of lithosphere greater Kenya rift region aiming at a better understanding evolution, with particular focus on plume–lithosphere interactions. The key methodology applied is 3-D integration diverse geological geophysical observations using gravity modelling. Accordingly, resulting lithospheric-scale density model consistent (i) reviewed descriptions lithological variations in sedimentary volcanic cover, (ii) known trends crust mantle seismic velocities as revealed by seismological data (iii) the observed field. This data-based first to image configuration crystalline for entire northern Tanzania. An upper basal crustal layer are differentiated, each composed several domains different average densities. interpret these trace back Precambrian terrane amalgamation associated East African Orogeny magmatic processes during Mesozoic Cenozoic rifting phases. In combination velocities, densities indicate compositional differences. derived have been used parameterise steady-state models. These temperatures decrease from west eastern Kenya, while integrated strength increases. Thereby, detailed appears strongly controlled complex inherited structure, which may decisive onset, localisation propagation rifting.