In search for the missing arc root of the Southern
01/10/2020· Arclogitc compositions of these rocks at high PT conditions of equilibration (600-900 °C, 12-28 kbar) and a bimodal U-Pb zircon age distribution overlapping that of the Mojave Desert region strongly implies the formation of these rocks as a continental arc root to the SCB. Titanite ages and Cenozoic Sm-Nd whole rock-garnet ages point toward post-displacement thermal overprints, perhaps a